BLACKSTONE SECURED LENDING FUND, 10-Q filed on 5/7/2026
Quarterly Report
v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 04, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Securities Act File Number 814-01299  
Entity Registrant Name Blackstone Secured Lending Fund  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-7020632  
Entity Address, Address Line One 345 Park Avenue  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10154  
City Area Code 212  
Local Phone Number 503-2100  
Title of 12(b) Security Common Shares of Beneficial Interest, $0.001 par value per share  
Trading Symbol BXSL  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   232,652,003
Entity Central Index Key 0001736035  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
v3.26.1
Condensed Consolidated Statements of Assets and Liabilities - USD ($)
Mar. 31, 2026
Dec. 31, 2025
ASSETS    
Investments at fair value $ 13,942,140,000 $ 14,207,294,000
Cash and Cash Equivalent 351,276,000 289,605,000
Receivable from broker 1,821,000 11,286,000
Deferred financing costs 18,700,000 19,753,000
Receivable for investments 2,311,000 3,187,000
Derivative assets at fair value (Note 6) 22,545,000 19,633,000
Total assets 14,436,610,000 14,656,463,000
LIABILITIES    
Debt (net of unamortized debt issuance costs of $41,840 and $39,900, respectively) 8,033,886,000 8,080,129,000
Payable for investments 11,326,000 2,172,000
Management fees payable (Note 3) 36,366,000 36,141,000
Income based incentive fees payable (Note 3) 2,294,000 26,400,000
Capital gains based incentive fees payable (Note 3) 0 0
Interest payable 60,581,000 61,952,000
Distribution payable 178,855,000 178,616,000
Board of Trustees’ fees payable 290,000 289,000
Accrued expenses and other liabilities 7,895,000 20,772,000
Total liabilities 8,336,930,000 8,411,288,000
Commitments and contingencies (Note 8)
NET ASSETS    
Common Shares, $0.001 par value (unlimited shares authorized; 232,279,811 and 231,969,058 shares issued and outstanding, respectively) 232,000 232,000
Additional paid in capital 6,055,864,000 6,047,750,000
Distributable earnings (loss) 43,584,000 197,193,000
Total net assets 6,099,680,000 6,245,175,000
Total liabilities and net assets $ 14,436,610,000 $ 14,656,463,000
Net asset value per share (in usd per share) $ 26.26 $ 26.92
Affiliated Entity    
LIABILITIES    
Due to affiliates $ 5,437,000 $ 4,817,000
Non-controlled/non-affiliated investments    
ASSETS    
Investments at fair value 13,903,727,000 [1],[2] 14,167,499,000 [3],[4]
Interest receivable from non-controlled/non-affiliated investments 97,807,000 105,695,000
Non-controlled/affiliated investments    
ASSETS    
Investments at fair value 38,413,000 [1],[2] 39,795,000 [3],[4]
Interest receivable from non-controlled/non-affiliated investments $ 10,000 $ 10,000
[1] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of March 31, 2026, the aggregate fair value of these securities is $13,941.7 million or 228.56% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[2] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of March 31, 2026, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[3] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of December 31, 2025, the aggregate fair value of these securities is $14,206.9 million or 227.48% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[4] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of December 31, 2025, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
v3.26.1
Condensed Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Cost $ 14,296,921 $ 14,387,967
Restricted cash 75,966 89,406
Net of unamortized debt issuance costs $ 41,840 $ 39,900
Common stock, par value (in usd per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares)
Common stock, shares issued (in shares) 232,279,811 231,969,058
Common stock, shares outstanding (in shares) 232,279,811 231,969,058
Non-controlled/non-affiliated investments    
Cost $ 14,257,276 [1],[2],[3] $ 14,349,416 [4],[5],[6]
Non-controlled/affiliated investments    
Cost $ 39,645 [1],[2],[3] $ 38,551 [4],[5],[6]
[1] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of March 31, 2026, the aggregate fair value of these securities is $13,941.7 million or 228.56% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[2] The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method in accordance with accounting principles generally accepted in the United States of America (“GAAP”).
[3] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of March 31, 2026, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[4] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of December 31, 2025, the aggregate fair value of these securities is $14,206.9 million or 227.48% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[5] The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method in accordance with accounting principles generally accepted in the United States of America (“GAAP”).
[6] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of December 31, 2025, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
v3.26.1
Condensed Consolidated Statements of Operations - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Investment income:    
Total investment income $ 325,471,000 $ 357,764,000
Expenses:    
Interest expense 100,169,000 92,976,000
Management fees (Note 3) 36,366,000 34,301,000
Income based incentive fees (Note 3) 2,294,000 34,301,000
Capital gains based incentive fees (Note 3) 0 0
Professional fees 1,217,000 886,000
Board of Trustees’ fees 290,000 306,000
Administrative service expenses (Note 3) 1,125,000 966,000
Other general and administrative expenses 1,006,000 1,063,000
Total expenses before tax expense 142,467,000 164,799,000
Net investment income before tax expense 183,004,000 192,965,000
Excise and other tax expense 4,090,000 4,169,000
Net investment income after tax expense 178,914,000 188,796,000
Net change in unrealized appreciation (depreciation):    
Net change in unrealized (appreciation) depreciation on investments (157,611,000) (40,754,000)
Derivative instruments (Note 6) 2,943,000 (1,921,000)
Translation of assets and liabilities in foreign currencies (735,000) 282,000
Income tax (provision) benefit 508,000 (1,481,000)
Net change in unrealized appreciation (depreciation), net of income tax (provision) benefit (154,895,000) (43,874,000)
Net realized gain (loss):    
Non-controlled/non-affiliated investments 1,161,000 8,525,000
Derivative instruments (Note 6) 1,842,000 (2,055,000)
Foreign currency transactions (1,776,000) (987,000)
Current tax expense on realized gains 0 (596,000)
Net realized gain (loss), net of tax expense 1,227,000 4,887,000
Net realized and change in unrealized gain (loss) (153,668,000) (38,987,000)
Net increase (decrease) in net assets resulting from operations $ 25,246,000 $ 149,809,000
Net investment income, basic (in usd per share) $ 0.77 $ 0.83
Net investment income, diluted (in usd per share) 0.77 0.83
Earnings (loss) per share basic (in usd per share) 0.11 0.66
Earnings (loss) per share diluted (in usd per share) $ 0.11 $ 0.66
Weighted average shares outstanding basic (in shares) 232,203,849 226,577,167
Weighted average shares outstanding diluted (in shares) 232,203,849 226,577,167
Non-controlled/non-affiliated investments    
Investment income:    
Interest income $ 302,216,000 $ 335,647,000
Payment-in-kind interest income 21,006,000 20,818,000
Dividend income 20,000 0
Other income 1,699,000 725,000
Net change in unrealized appreciation (depreciation):    
Net change in unrealized (appreciation) depreciation on investments (155,134,000) (40,105,000)
Net realized gain (loss):    
Non-controlled/non-affiliated investments 1,161,000 8,525,000
Non-controlled/affiliated investments    
Investment income:    
Interest income 0 39,000
Payment-in-kind interest income 530,000 535,000
Net change in unrealized appreciation (depreciation):    
Net change in unrealized (appreciation) depreciation on investments (2,477,000) (649,000)
Net realized gain (loss):    
Non-controlled/non-affiliated investments $ 0 $ 0
v3.26.1
Condensed Consolidated Statements of Changes in Net Assets - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Investment Company, Net Assets [Roll Forward]    
Beginning balance $ 6,245,175 $ 6,076,521
Issuance of Common Shares, net of offering and underwriting costs 0 184,830
Reinvestment of dividends [1] 8,114 5,130
Net investment income after tax expense 178,914 188,796
Net change in unrealized appreciation (depreciation), net of income tax (provision) benefit (154,895) (43,874)
Net realized gain (loss), net of tax expense 1,227 4,887
Dividends declared and payable from net investment income (178,855) (175,421)
Ending balance 6,099,680 6,240,869
Par Amount    
Investment Company, Net Assets [Roll Forward]    
Beginning balance 232 222
Issuance of Common Shares, net of offering and underwriting costs 0 6
Ending balance 232 228
Additional Paid in Capital    
Investment Company, Net Assets [Roll Forward]    
Beginning balance 6,047,750 5,749,762
Issuance of Common Shares, net of offering and underwriting costs 0 184,824
Reinvestment of dividends [1] 8,114 5,130
Ending balance 6,055,864 5,939,716
Distributable Earnings (Loss)    
Investment Company, Net Assets [Roll Forward]    
Beginning balance 197,193 326,537
Net investment income after tax expense 178,914 188,796
Net change in unrealized appreciation (depreciation), net of income tax (provision) benefit (154,895) (43,874)
Net realized gain (loss), net of tax expense 1,227 4,887
Dividends declared and payable from net investment income (178,855) (175,421)
Ending balance $ 43,584 $ 300,925
[1] The par amount of the shares is less than 1,000 and rounds to zero.
v3.26.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Cash flows from operating activities:    
Net increase (decrease) in net assets resulting from operations $ 25,246 $ 149,809
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:    
Net change in unrealized (appreciation) depreciation on investments 157,611 40,754
Net change in unrealized (appreciation) depreciation on derivative instruments (2,943) 1,921
Net change in unrealized (appreciation) depreciation on translation of assets and liabilities in foreign currencies 735 (282)
Net realized (gain) loss on investments (1,161) (8,525)
Net change due to hedging activity (659) (1,124)
Net realized (gain) loss on foreign currency transactions 1,776 0
Net accretion of discount and amortization of premium (11,383) (16,419)
Payment-in-kind interest capitalized (22,537) (22,613)
Amortization of deferred financing costs 1,450 1,409
Amortization of original issue discount and debt issuance costs (including premiums and discounts) 3,935 3,350
Purchases of investments (324,788) (689,214)
Proceeds from sale of investments and principal repayments 450,915 977,955
Changes in operating assets and liabilities:    
Interest receivable 7,888 4,789
Receivable for investments 876 (5,447)
Derivative instruments, net (18,815) (7,468)
Receivable from broker 9,465 (4,763)
Payable for investments 9,154 8,271
Due to affiliates 620 (89)
Management fees payable 225 1,996
Income based incentive fees payable (24,106) (4,407)
Capital gains based incentive fees payable 0 0
Interest payable (1,371) 3,953
Accrued expenses and other liabilities (12,876) (9,192)
Net cash provided by (used in) operating activities 249,257 424,664
Cash flows from financing activities:    
Borrowings on debt 1,367,849 846,940
Repayments on debt (1,380,700) (559,606)
Deferred financing costs paid (398) 0
Debt issuance costs paid (457) (827)
Dividends paid in cash (170,502) (165,622)
Proceeds from issuance of Common Shares, net of offering and underwriting costs 0 189,235
Net cash provided by (used in) financing activities (184,208) 310,120
Net increase (decrease) in cash and cash equivalents 65,049 734,784
Effect of foreign exchange rate changes on cash and cash equivalents (3,378) 615
Cash and cash equivalents (including restricted cash), beginning of period 289,605 229,606
Cash and cash equivalents (including restricted cash), end of period 351,276 965,005
Supplemental information and non-cash activities:    
Interest paid during the period 115,628 96,301
Distribution payable 178,855 175,421
Reinvestment of distributions during the period 8,114 5,130
Accrued but unpaid debt issuance costs 1,322 1,866
Excise and other taxes paid $ 16,022 $ 15,066
Not available
v3.26.1
Condensed Consolidated Schedule of Investments (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Percentage of portfolio above floor rate 90.00% 88.10%
Fair Value as % of Net Assets 228.60% 227.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 14,207,294  
Ending balance $ 13,942,140 $ 14,207,294
Non-controlled/non-affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 227.94% [1],[2] 226.84% [3],[4]
Unfunded commitments $ 1,644,109 $ 1,788,734
Fair Value (5,311) (5,969)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] 14,167,499  
Ending balance $ 13,903,727 [1],[2] $ 14,167,499 [3],[4]
Non-controlled/affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.63% [1],[2] 0.65% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 39,795  
Ending balance 38,413 [1],[2] $ 39,795 [3],[4]
Non-controlled/affiliated investments | Align Precision Group, LLC 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 8,762 0
Gross Additions 228 8,762
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) 0 0
Net Realized Gain (Loss) 0 0
Ending balance 8,990 8,762
Dividend and Interest Income 227 465
Non-controlled/affiliated investments | Align Precision Group, LLC 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 1,370 0
Gross Additions 495 1,366
Gross Reductions 0 (3)
Net Change in Unrealized Gains (Losses) 0 7
Net Realized Gain (Loss) 0 0
Ending balance 1,865 1,370
Dividend and Interest Income 42 106
Non-controlled/affiliated investments | Align Precision Group, LLC - Class A-3 Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 1,549 0
Gross Additions 0 384
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (868) 1,165
Net Realized Gain (Loss) 0 0
Ending balance 681 1,549
Dividend and Interest Income 0 0
Non-controlled/affiliated investments | Blackstone Donegal Holdings LP - LP Interests (Westland Insurance Group LTD)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 5,315 6,403
Gross Additions 0 0
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (94) (1,088)
Net Realized Gain (Loss) 0 0
Ending balance 5,221 5,315
Dividend and Interest Income 0 0
Non-controlled/affiliated investments | Material Holdings, LLC 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 22,074 21,547
Gross Additions 350 931
Gross Reductions (476) (297)
Net Change in Unrealized Gains (Losses) (1,515) (107)
Net Realized Gain (Loss) 0 0
Ending balance 20,433 22,074
Dividend and Interest Income 242 2,612
Non-controlled/affiliated investments | Material Holdings, LLC 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 0 1,397
Gross Additions 0 141
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) 0 (1,538)
Net Realized Gain (Loss) 0 0
Ending balance 0 0
Dividend and Interest Income 0 0
Non-controlled/affiliated investments | Material Holdings, LLC 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 725 0
Gross Additions 498 726
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) 0 (1)
Net Realized Gain (Loss) 0 0
Ending balance 1,223 725
Dividend and Interest Income 19 12
Non-controlled/affiliated investments | Material+ Holding Company, LLC - Class C Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 0 0
Gross Additions 0 0
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) 0 0
Net Realized Gain (Loss) 0 0
Ending balance 0 0
Dividend and Interest Income 0 0
Non-controlled/affiliated investments | Material+ Holding Company, LLC - Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 0  
Gross Additions 0  
Gross Reductions 0  
Net Change in Unrealized Gains (Losses) 0  
Net Realized Gain (Loss) 0  
Ending balance 0 0
Dividend and Interest Income 0  
Non-controlled/affiliated investments | Material+ Holding Company, LLC - Class A Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 0  
Gross Additions 0  
Gross Reductions 0  
Net Change in Unrealized Gains (Losses) 0  
Net Realized Gain (Loss) 0  
Ending balance 0 0
Dividend and Interest Income 0  
Non-controlled/affiliated investments | Material+ Holding Company, LLC - Class B Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 0  
Gross Additions 0  
Gross Reductions 0  
Net Change in Unrealized Gains (Losses) 0  
Net Realized Gain (Loss) 0  
Ending balance 0 0
Dividend and Interest Income 0  
Affiliated investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 39,795 29,347
Gross Additions 1,571 12,310
Gross Reductions (476) (300)
Net Change in Unrealized Gains (Losses) (2,477) (1,562)
Net Realized Gain (Loss) 0 0
Ending balance 38,413 39,795
Dividend and Interest Income $ 530 $ 3,195
Qualifying Assets    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 70.00% 70.00%
Non-qualifying Assets    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 18.00% 17.20%
Restricted Securities    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 228.56% 227.48%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 14,206,900  
Ending balance $ 13,941,700 $ 14,206,900
Investment, Identifier [Axis]: 123Dentist, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[6],[7],[8] 0.03% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 1,581  
Ending balance $ 1,556 [1],[2],[5],[6],[7],[8] $ 1,581 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: 123Dentist, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[6],[7],[8] 0.00% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 213  
Ending balance $ 210 [1],[2],[5],[6],[7],[8] $ 213 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: 123Dentist, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[6],[7],[8],[13] 0.08% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 4,948  
Ending balance 10,510 [1],[2],[5],[6],[7],[8],[13] $ 4,948 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: 123Dentist, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 18,176 23,908
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ACI Group Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.53% [1],[2],[5],[8],[15] 1.71% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 106,482  
Ending balance $ 93,594 [1],[2],[5],[8],[15] $ 106,482 [3],[4],[9],[12]
Investment, Identifier [Axis]: ACI Group Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[7],[8],[13],[15] 0.15% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 9,138  
Ending balance 7,952 [1],[2],[5],[7],[8],[13],[15] $ 9,138 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: ACI Group Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 116 116
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[8],[16] 0.11% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 6,708  
Ending balance $ 6,022 [1],[2],[8],[16] $ 6,708 [3],[4],[12],[17]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[16] 0.03% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 1,608  
Ending balance $ 1,443 [1],[2],[7],[8],[16] $ 1,608 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[13],[16] 0.00% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 186  
Ending balance 390 [1],[2],[7],[8],[13],[16] $ 186 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 780 1,115
Fair Value 0 $ 0
Investment, Identifier [Axis]: AGI Group Holdings, LP - Class A-2 Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] 1,511  
Ending balance [3],[4],[12]   $ 1,511
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   1.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] 93,442  
Ending balance [3],[4],[9],[12]   $ 93,442
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 6,087  
Ending balance [3],[4],[9],[11],[12]   $ 6,087
Investment, Identifier [Axis]: AI Altius Luxembourg S.à r.l. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[18] 0.02% [3],[4],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[19] $ 1,166  
Ending balance $ 1,172 [1],[2],[7],[8],[18] $ 1,166 [3],[4],[11],[12],[19]
Investment, Identifier [Axis]: AI Altius US Bidco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   500
Fair Value   $ 0
Investment, Identifier [Axis]: AI Altius US Bidco, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[5],[8] 0.12% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 7,531  
Ending balance $ 7,531 [1],[2],[5],[8] $ 7,531 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: AI Titan Group Holdings, LP - Class A-2 Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 49  
Ending balance 46 [1],[2],[8] $ 49 [3],[4],[12]
Investment, Identifier [Axis]: AI Titan Parent, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 675 675
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: AI Titan Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8],[13] 0.07% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,543  
Ending balance 4,543 [1],[2],[5],[7],[8],[13] $ 4,543 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: AI Titan Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 544 544
Fair Value $ (5) $ (5)
Investment, Identifier [Axis]: ALKU, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 774  
Ending balance $ 772 [1],[2],[5],[7],[8] $ 774 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: ALKU, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.42% [1],[2],[5],[8] 0.41% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 25,475  
Ending balance $ 25,410 [1],[2],[5],[8] $ 25,475 [3],[4],[9],[12]
Investment, Identifier [Axis]: AVE Holdings I Corp. - Series A-1 Preferred Shares | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 382  
Ending balance $ 266 [1],[2],[8] $ 382 [3],[4],[12]
Investment, Identifier [Axis]: Abacus Holdco 2, Oy 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[18] 0.01% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 855  
Ending balance $ 841 [1],[2],[6],[7],[8],[18] $ 855 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Abacus Holdco 2, Oy 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[13],[18] 0.00% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 130  
Ending balance 128 [1],[2],[6],[7],[8],[13],[18] $ 130 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Abacus Holdco 2, Oy | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 177 177
Fair Value $ 0 0
Investment, Identifier [Axis]: Accordion Partners, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 10,195  
Investment, Identifier [Axis]: Accordion Partners, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 1,956  
Investment, Identifier [Axis]: Accordion Partners, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,425 8,432
Fair Value 0 $ (21)
Investment, Identifier [Axis]: Accordion Partners, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   0.16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] 10,165  
Ending balance [3],[4],[9],[12],[14]   $ 10,165
Investment, Identifier [Axis]: Accordion Partners, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,789 1,789
Fair Value (9) (9)
Investment, Identifier [Axis]: Accuity Delivery Systems, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 15,982 15,982
Fair Value $ (80) $ 0
Investment, Identifier [Axis]: Accuity Delivery Systems, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[2],[7],[8],[13],[20] 0.51% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 31,778  
Ending balance 31,699 [1],[2],[7],[8],[13],[20] $ 31,778 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: Accuity Delivery Systems, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,327 5,327
Fair Value $ (27) $ (27)
Investment, Identifier [Axis]: Acumatica Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[7],[8],[13] 0.18% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 11,477  
Ending balance 11,477 [1],[2],[5],[7],[8],[13] $ 11,477 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Acumatica Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,935 1,935
Fair Value $ (19) $ (19)
Investment, Identifier [Axis]: Aevex Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.77% [1],[2],[8],[16] 0.75% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 46,598  
Ending balance $ 46,713 [1],[2],[8],[16] $ 46,598 [3],[4],[12],[17]
Investment, Identifier [Axis]: Aevex Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.77% [1],[2],[8],[16] 1.72% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 107,406  
Ending balance $ 107,661 [1],[2],[8],[16] $ 107,406 [3],[4],[12],[17]
Investment, Identifier [Axis]: Albireo Energy, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.25% [1],[2],[8],[16] 1.23% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 76,535  
Ending balance $ 76,333 [1],[2],[8],[16] $ 76,535 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Albireo Energy, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.47% [1],[2],[7],[8],[13],[16] 0.37% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 22,972  
Ending balance 28,847 [1],[2],[7],[8],[13],[16] $ 22,972 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Albireo Energy, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[17]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] 6,198  
Ending balance [3],[4],[11],[12],[17]   $ 6,198
Investment, Identifier [Axis]: Albireo Energy, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 25,000  
Fair Value 0  
Investment, Identifier [Axis]: Align Precision Group, LLC - Class A-3 Units | Non-Controlled Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[22]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[22] $ 1,549  
Ending balance [3],[4],[12],[22]   $ 1,549
Investment, Identifier [Axis]: Align Precision Group, LLC - Class A-3 Units | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[23] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[23] $ 681  
Investment, Identifier [Axis]: Align Precision Group, LLC 1 | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[8],[16],[23] 0.14% [3],[4],[11],[12],[17],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17],[22] $ 8,762  
Ending balance $ 8,990 [1],[2],[8],[16],[23] $ 8,762 [3],[4],[11],[12],[17],[22]
Investment, Identifier [Axis]: Align Precision Group, LLC 2 | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[13],[16],[23] 0.02% [3],[4],[11],[12],[14],[17],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17],[22] $ 1,370  
Ending balance 1,865 [1],[2],[7],[8],[13],[16],[23] $ 1,370 [3],[4],[11],[12],[14],[17],[22]
Investment, Identifier [Axis]: Align Precision Group, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 135 560
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Allium Buyer, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[13],[16] 0.02% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 1,557  
Ending balance 1,553 [1],[2],[7],[8],[13],[16] $ 1,557 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Allium Buyer, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 249 249
Fair Value $ (7) $ (7)
Investment, Identifier [Axis]: American Restoration Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[8],[16] 0.07% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 4,556  
Ending balance $ 4,522 [1],[2],[8],[16] $ 4,556 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[16] 0.02% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 1,357  
Ending balance $ 1,346 [1],[2],[7],[8],[16] $ 1,357 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[16] 0.02% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 1,143  
Ending balance $ 1,735 [1],[2],[7],[8],[16] $ 1,143 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[16] 0.06% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 3,514  
Ending balance $ 3,488 [1],[2],[7],[8],[16] $ 3,514 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[13],[16] 0.05% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 3,014  
Ending balance $ 3,726 [1],[2],[7],[8],[13],[16] $ 3,014 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[16] 0.01% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 587  
Ending balance 583 [1],[2],[7],[8],[16] $ 587 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: American Restoration Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,447 5,210
Fair Value $ 0 0
Investment, Identifier [Axis]: American Restoration Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   601
Fair Value   $ 0
Investment, Identifier [Axis]: Amerilife Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.58% [1],[2],[5],[8],[13] 1.53% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 95,857  
Ending balance $ 96,273 [1],[2],[5],[8],[13] $ 95,857 [3],[4],[9],[12]
Investment, Identifier [Axis]: Amerilife Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[13] 0.05% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 3,172  
Ending balance 2,511 [1],[2],[5],[7],[8],[13] $ 3,172 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Amerilife Holdings, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 29 29
Fair Value 0 0
Investment, Identifier [Axis]: Amerilife Holdings, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 31,555 31,555
Fair Value (79) (79)
Investment, Identifier [Axis]: Amerilife Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 13,350 13,350
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Amerivet Partners Management, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8],[13] 0.08% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 5,253  
Ending balance 5,103 [1],[2],[5],[8],[13] $ 5,253 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Amerivet Partners Management, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 589 589
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Anaplan, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.40% [1],[2],[5],[8],[13] 0.39% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 24,242  
Ending balance 24,181 [1],[2],[5],[8],[13] $ 24,242 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Anaplan, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 161 161
Fair Value (3) (3)
Investment, Identifier [Axis]: Animal Wellness Investments S.p.A | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,418  
Fair Value $ 0  
Investment, Identifier [Axis]: Animal Wellness Investments S.p.A | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[13],[18] 0.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[13],[18] $ 14,609  
Investment, Identifier [Axis]: Animal Wellness Investments SpA | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,400
Fair Value   0
Investment, Identifier [Axis]: Animal Wellness Investments SpA | Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   14,878
Fair Value   $ 0
Investment, Identifier [Axis]: Apex Companies, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[8],[16] 0.17% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 10,841  
Ending balance $ 10,813 [1],[2],[8],[16] $ 10,841 [3],[4],[12],[17]
Investment, Identifier [Axis]: Apex Companies, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[16] 0.03% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 1,817  
Ending balance $ 1,954 [1],[2],[7],[8],[16] $ 1,817 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Apex Companies, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[7],[8],[16] 0.12% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 7,242  
Ending balance $ 8,254 [1],[2],[7],[8],[16] $ 7,242 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Apex Companies, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 7,736  
Investment, Identifier [Axis]: Apex Companies, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 20,497  
Fair Value $ 0  
Investment, Identifier [Axis]: Apex Companies, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   1,030
Fair Value   0
Investment, Identifier [Axis]: Apex Companies, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   28,233
Fair Value   $ (141)
Investment, Identifier [Axis]: Armada Parent, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,247  
Ending balance $ 1,244 [1],[2],[5],[7],[8],[13] $ 1,247 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Armada Parent, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[5],[8] 0.40% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 25,216  
Ending balance 25,152 [1],[2],[5],[8] $ 25,216 [3],[4],[9],[12]
Investment, Identifier [Axis]: Armada Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,000 3,000
Fair Value 0 0
Investment, Identifier [Axis]: Arnhem BidCo, GmbH | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 9,126 9,126
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Arnhem BidCo, GmbH | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.98% [1],[2],[6],[8],[13],[18] 0.97% [3],[4],[10],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[19] $ 60,829  
Ending balance $ 59,828 [1],[2],[6],[8],[13],[18] $ 60,829 [3],[4],[10],[12],[14],[19]
Investment, Identifier [Axis]: Artisan Acquisitionco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.93% [1],[2],[6],[8],[18] 0.91% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 57,011  
Ending balance $ 57,011 [1],[2],[6],[8],[18] $ 57,011 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: Artisan Acquisitionco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[6],[8],[18] 0.13% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 7,918  
Ending balance $ 7,918 [1],[2],[6],[8],[18] $ 7,918 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: Aryeh Bidco Investment Ltd | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,049
Fair Value   0
Investment, Identifier [Axis]: Aryeh Bidco Investment Ltd | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   749
Fair Value   0
Investment, Identifier [Axis]: Aryeh Bidco Investment Ltd | Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,634
Fair Value   $ 0
Investment, Identifier [Axis]: Aryeh Bidco Investment, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 5,559  
Investment, Identifier [Axis]: Aryeh Bidco Investment, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8],[13] $ 136  
Investment, Identifier [Axis]: Aryeh Bidco Investment, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 898  
Fair Value 0  
Investment, Identifier [Axis]: Aryeh Bidco Investment, Ltd. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 748  
Fair Value $ (7)  
Investment, Identifier [Axis]: Ascend Buyer, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[5],[8],[13] 0.33% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 20,668  
Ending balance $ 20,615 [1],[2],[5],[8],[13] $ 20,668 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Ascend Buyer, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,599  
Ending balance 1,595 [1],[2],[5],[7],[8] $ 1,599 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Ascend Buyer, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,572 2,572
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Auctane, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.56% [1],[2],[5],[8] 4.39% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 274,123  
Ending balance $ 278,297 [1],[2],[5],[8] $ 274,123 [3],[4],[9],[12]
Investment, Identifier [Axis]: Auctane, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8] 0.05% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 3,224  
Ending balance $ 3,273 [1],[2],[5],[7],[8] $ 3,224 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: AuditBoard, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[2],[5],[8],[13] 0.22% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 13,684  
Ending balance $ 13,646 [1],[2],[5],[8],[13] $ 13,684 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: AuditBoard, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,752  
Ending balance 1,761 [1],[2],[5],[7],[8] $ 1,752 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: AuditBoard, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,766 1,766
Fair Value $ (4) $ 0
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. - Common Stock | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6] 0.01% [3],[4],[10]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10] $ 438  
Ending balance $ 405 [1],[2],[6] $ 438 [3],[4],[10]
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[6],[7],[8] 0.19% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 11,740  
Ending balance $ 11,740 [1],[2],[5],[6],[7],[8] $ 11,740 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[6],[7],[8],[13] 0.11% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 6,848  
Ending balance 6,848 [1],[2],[5],[6],[7],[8],[13] $ 6,848 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 8,805 8,805
Fair Value 0 0
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 8,805 8,805
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[2],[5],[8],[13] 0.59% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 36,919  
Ending balance 36,919 [1],[2],[5],[8],[13] $ 36,919 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,104 4,104
Fair Value $ (17) $ (17)
Investment, Identifier [Axis]: BP Purchaser, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[8] 0.09% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 5,751  
Ending balance $ 5,748 [1],[2],[5],[8] $ 5,751 [3],[4],[9],[12]
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.87% [1],[2],[5],[8] 0.85% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 53,135  
Ending balance $ 53,001 [1],[2],[5],[8] $ 53,135 [3],[4],[9],[12]
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8],[13] 0.06% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 3,644  
Ending balance 4,170 [1],[2],[5],[7],[8],[13] $ 3,644 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 729 1,260
Fair Value (7) (13)
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,339 10,339
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[13],[16] 0.02% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 956  
Ending balance $ 969 [1],[2],[7],[8],[13],[16] $ 956 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[16] 0.01% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 412  
Ending balance $ 401 [1],[2],[7],[8],[16] $ 412 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[16] 0.00% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 106  
Ending balance 104 [1],[2],[7],[8],[16] $ 106 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Bamboo US BidCo, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   24
Fair Value   0
Investment, Identifier [Axis]: Bamboo US BidCo, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 142 142
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[8],[16] 0.15% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 9,297  
Ending balance $ 9,274 [1],[2],[8],[16] $ 9,297 [3],[4],[12],[17]
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[7],[8],[16] 0.11% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 6,745  
Ending balance $ 6,731 [1],[2],[7],[8],[16] $ 6,745 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[13],[16] 0.02% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 1,308  
Ending balance $ 1,827 [1],[2],[7],[8],[13],[16] $ 1,308 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 132  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 9,646 10,169
Fair Value 0 0
Investment, Identifier [Axis]: Banyan Software Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 872 1,006
Fair Value $ 0 $ (3)
Investment, Identifier [Axis]: Barbri Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.30% [1],[2],[5],[8] 1.28% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 80,225  
Ending balance $ 79,423 [1],[2],[5],[8] $ 80,225 [3],[4],[9],[12]
Investment, Identifier [Axis]: Bayshore Intermediate #2, LP 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.61% [1],[2],[5],[8] 1.56% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 97,682  
Ending balance $ 98,374 [1],[2],[5],[8] $ 97,682 [3],[4],[9],[12]
Investment, Identifier [Axis]: Bayshore Intermediate #2, LP 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[13] 0.04% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 2,287  
Ending balance 2,287 [1],[2],[5],[7],[8],[13] $ 2,287 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Bayshore Intermediate #2, LP | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,936 6,936
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bazaarvoice, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.88% [1],[2],[8],[13],[18] 3.82% [3],[4],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[19] $ 238,337  
Ending balance 236,955 [1],[2],[8],[13],[18] $ 238,337 [3],[4],[12],[14],[19]
Investment, Identifier [Axis]: Bazaarvoice, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 37,992 37,992
Fair Value $ (190) $ 0
Investment, Identifier [Axis]: Beacon Dc, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.20% [1],[2],[5],[6],[8] 2.15% [3],[4],[9],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12] $ 134,152  
Ending balance $ 134,152 [1],[2],[5],[6],[8] $ 134,152 [3],[4],[9],[10],[12]
Investment, Identifier [Axis]: Beacon Dc, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[6],[7],[8],[13] 0.04% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 2,530  
Ending balance 2,374 [1],[2],[5],[6],[7],[8],[13] $ 2,530 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Beacon Dc, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 27,239 27,239
Fair Value (156) 0
Investment, Identifier [Axis]: Beacon Dc, Ltd. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 18,530 18,530
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Beacon HC, Ltd. - Class A Shares | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[8] 0.02% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 1,290  
Ending balance $ 1,290 [1],[2],[6],[8] $ 1,290 [3],[4],[10],[12]
Investment, Identifier [Axis]: Beacon HC, Ltd. - Class C Shares | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 72  
Ending balance $ 72 [1],[2],[6],[8] $ 72 [3],[4],[10],[12]
Investment, Identifier [Axis]: Bending Spoons US, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[2],[6],[16] 0.28% [3],[4],[10],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[17] $ 17,272  
Ending balance $ 16,043 [1],[2],[6],[16] $ 17,272 [3],[4],[10],[17]
Investment, Identifier [Axis]: Bidco 76 S.p.A. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.42% [1],[2],[6],[8],[18] 0.41% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 25,863  
Ending balance $ 25,438 [1],[2],[6],[8],[18] $ 25,863 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: Bimini Group Purchaser, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.13% [1],[2],[5],[8] 1.11% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 69,184  
Ending balance $ 69,009 [1],[2],[5],[8] $ 69,184 [3],[4],[9],[12]
Investment, Identifier [Axis]: Bimini Group Purchaser, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[2],[5],[7],[8],[13] 0.21% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 12,993  
Ending balance 12,971 [1],[2],[5],[7],[8],[13] $ 12,993 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Bimini Group Purchaser, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,337 7,337
Fair Value $ 0 0
Investment, Identifier [Axis]: Biotouch Global Solutions, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[13],[16] 0.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[13],[16] $ 23,347  
Investment, Identifier [Axis]: Biotouch Global Solutions, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 733  
Investment, Identifier [Axis]: Biotouch Global Solutions, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,409 5,409
Fair Value (41) $ (41)
Investment, Identifier [Axis]: Biotouch Global Solutions, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[14],[17]   0.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] 23,555  
Ending balance [3],[4],[12],[14],[17]   $ 23,555
Investment, Identifier [Axis]: Biotouch Global Solutions, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 865 1,623
Fair Value $ 0 $ (24)
Investment, Identifier [Axis]: BlackRock ICS US Treasury Fund    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2] 0.05% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 3,167  
Ending balance 166 [1],[2] $ 3,167 [3],[4]
Investment, Identifier [Axis]: Blackstone Donegal Holdings LP - LP Interests (Westland Insurance Group LTD) | Non-Controlled Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[22]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[22] $ 5,315  
Ending balance [3],[4],[10],[12],[22]   $ 5,315
Investment, Identifier [Axis]: Blackstone Donegal Holdings LP - LP Interests (Westland Insurance Group LTD) | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[23] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[23] $ 5,221  
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[8] 0.03% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 1,937  
Ending balance $ 1,952 [1],[2],[5],[8] $ 1,937 [3],[4],[9],[12]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 342  
Ending balance $ 345 [1],[2],[5],[7],[8] $ 342 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8] 0.00% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 235  
Ending balance $ 237 [1],[2],[5],[7],[8] $ 235 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,573  
Ending balance $ 1,585 [1],[2],[5],[7],[8] $ 1,573 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Bluefin Holding, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.45% [1],[2],[8],[13],[16] 0.44% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 27,291  
Ending balance 27,291 [1],[2],[8],[13],[16] $ 27,291 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: Bluefin Holding, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,244 2,244
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bond Lux HoldCo S.à r.l. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[6],[7],[8],[18] 0.18% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 11,389  
Ending balance $ 11,201 [1],[2],[6],[7],[8],[18] $ 11,389 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, LP) - Class A Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[12]
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, LP) - Class C Preferred Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[12]
Investment, Identifier [Axis]: Brave Parent Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.10% [1],[2],[8],[13],[20] 1.07% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 67,106  
Ending balance 66,935 [1],[2],[8],[13],[20] $ 67,106 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Brave Parent Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,409 3,641
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Brilliance Technologies, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[13],[20] 0.02% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 1,499  
Ending balance $ 1,494 [1],[2],[7],[8],[13],[20] $ 1,499 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: Brilliance Technologies, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[20] 0.04% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 2,400  
Ending balance $ 2,399 [1],[2],[7],[8],[20] $ 2,400 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Brilliance Technologies, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[20] 0.03% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 2,130  
Ending balance 2,129 [1],[2],[7],[8],[20] $ 2,130 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Brilliance Technologies, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,200 1,200
Fair Value (1) (1)
Investment, Identifier [Axis]: Brilliance Technologies, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 900 900
Fair Value (5) $ 0
Investment, Identifier [Axis]: Businessolver.com, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 5,096  
Ending balance [3],[4],[9],[12]   $ 5,096
Investment, Identifier [Axis]: Businessolver.com. Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 5,096  
Investment, Identifier [Axis]: CB Nike Holdco, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.67% [1],[2],[8],[16] 0.63% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 39,643  
Ending balance $ 40,738 [1],[2],[8],[16] $ 39,643 [3],[4],[12],[17]
Investment, Identifier [Axis]: CCBlue Bidco, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[7],[8] 0.16% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 10,035  
Ending balance $ 10,324 [1],[2],[5],[7],[8] $ 10,035 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: CCI Buyer, Inc. | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[5],[8],[13] 0.35% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 21,901  
Ending balance 21,846 [1],[2],[5],[8],[13] $ 21,901 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: CCI Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,289 1,289
Fair Value $ (13) $ (13)
Investment, Identifier [Axis]: CFCo, LLC (Benefytt Technologies, Inc.) - Class B Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[12]
Investment, Identifier [Axis]: CFCo, LLC (Benefytt Technologies, Inc.) | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[15],[18],[24] 0.00% [3],[4],[11],[12],[19],[25],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[19],[25],[26] $ 0  
Ending balance $ 0 [1],[2],[7],[8],[15],[18],[24] $ 0 [3],[4],[11],[12],[19],[25],[26]
Investment, Identifier [Axis]: CFGI Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[5],[8],[13] 0.10% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 5,971  
Ending balance 5,807 [1],[2],[5],[8],[13] $ 5,971 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: CFGI Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,050 1,050
Fair Value $ (26) $ (21)
Investment, Identifier [Axis]: CFS Brands, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.28% [1],[2],[8],[13],[16] 2.21% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 138,043  
Ending balance 139,291 [1],[2],[8],[13],[16] $ 138,043 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: CFS Brands, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,907 8,483
Fair Value 0 0
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,867 2,867
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[8],[13] 0.18% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 11,339  
Ending balance 11,310 [1],[2],[5],[8],[13] $ 11,339 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,912 1,912
Fair Value $ (16) $ (16)
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.46% [1],[2],[5],[8] 0.45% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 28,062  
Ending balance $ 27,992 [1],[2],[5],[8] $ 28,062 [3],[4],[9],[12]
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 407  
Ending balance $ 406 [1],[2],[5],[7],[8],[13] $ 407 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.46% [1],[2],[5],[7],[8],[13] 0.45% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 28,112  
Ending balance $ 28,041 [1],[2],[5],[7],[8],[13] $ 28,112 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[5],[8] 0.19% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 12,116  
Ending balance $ 12,086 [1],[2],[5],[8] $ 12,116 [3],[4],[9],[12]
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8],[13] 0.08% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 5,193  
Ending balance 5,180 [1],[2],[5],[7],[8],[13] $ 5,193 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 2,002 1,914
Fair Value 0 0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 1,735 1,735
Fair Value 0 0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. | Delayed Draw Term Loan 3    
Schedule of Investments [Line Items]    
Unfunded commitments 1,737 88
Fair Value 0 0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. | Delayed Draw Term Loan 4    
Schedule of Investments [Line Items]    
Unfunded commitments 1,165 1,737
Fair Value 0 0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. | Delayed Draw Term Loan 5    
Schedule of Investments [Line Items]    
Unfunded commitments   1,165
Fair Value   0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,904 5,904
Fair Value $ (59) $ (59)
Investment, Identifier [Axis]: Cadillac BidCo S.à r.l. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[18] 0.75%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[18] $ 46,007  
Investment, Identifier [Axis]: Caerus Midco 2 S.à r.l. - Additional Vehicle Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 1  
Ending balance $ 1 [1],[2],[6],[8] $ 1 [3],[4],[10],[12]
Investment, Identifier [Axis]: Caerus Midco 2 S.à r.l. - Vehicle Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 54  
Ending balance $ 47 [1],[2],[6],[8] $ 54 [3],[4],[10],[12]
Investment, Identifier [Axis]: Caerus US 1, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[5],[6],[7],[8] 0.18% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 11,169  
Ending balance $ 11,140 [1],[2],[5],[6],[7],[8] $ 11,169 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: Caerus US 1, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[6],[7],[8] 0.03% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 2,154  
Ending balance $ 2,148 [1],[2],[5],[6],[7],[8] $ 2,154 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: Caerus US 1, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[6],[7],[8] 0.01% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 315  
Ending balance $ 314 [1],[2],[5],[6],[7],[8] $ 315 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: Caerus US 1, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.81% [1],[2],[5],[6],[8] 0.79% [3],[4],[9],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12] $ 49,250  
Ending balance $ 49,125 [1],[2],[5],[6],[8] $ 49,250 [3],[4],[9],[10],[12]
Investment, Identifier [Axis]: Caerus US 1, Inc. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[6],[7],[8],[13] 0.02% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 1,014  
Ending balance 1,022 [1],[2],[5],[6],[7],[8],[13] $ 1,014 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Caerus US 1, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 265 273
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cambium Holdings, LLC - Senior Preferred Interest | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[8] 0.26% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 15,641  
Ending balance $ 16,066 [1],[2],[8] $ 15,641 [3],[4],[12]
Investment, Identifier [Axis]: Cambium Learning Group, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.49% [1],[2],[5],[8],[13] 4.41% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 275,439  
Ending balance 274,013 [1],[2],[5],[8],[13] $ 275,439 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Cambium Learning Group, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 43,592 43,592
Fair Value $ 0 0
Investment, Identifier [Axis]: Cambrex Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.37%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 22,565  
Investment, Identifier [Axis]: Cambrex Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 3,273  
Investment, Identifier [Axis]: Cambrex Corp. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   3,323
Fair Value   (17)
Investment, Identifier [Axis]: Cambrex Corp. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   7,735
Fair Value   $ 0
Investment, Identifier [Axis]: Cambrex Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   0.35%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] 22,105  
Ending balance [3],[4],[9],[12],[14]   $ 22,105
Investment, Identifier [Axis]: Cambrex Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,243 2,741
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[6],[7],[8],[16] 0.34% [3],[4],[10],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[17] $ 21,145  
Ending balance $ 20,808 [1],[2],[6],[7],[8],[16] $ 21,145 [3],[4],[10],[11],[12],[17]
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[6],[7],[8],[13] 0.02% [3],[4],[10],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[17] $ 1,399  
Ending balance $ 1,294 [1],[2],[5],[6],[7],[8],[13] $ 1,399 [3],[4],[10],[11],[12],[14],[17]
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[6],[7],[8],[18] 0.12% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 7,272  
Ending balance 7,269 [1],[2],[6],[7],[8],[18] $ 7,272 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,607 1,500
Fair Value 0 $ 0
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 5,404  
Ending balance [3],[4],[12],[17]   $ 5,404
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 5,391  
Investment, Identifier [Axis]: Caribou Bidco, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.84% [1],[2],[6],[8],[18] 0.85% [10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[12],[19] $ 52,948  
Ending balance $ 51,471 [1],[2],[6],[8],[18] $ 52,948 [10],[12],[19]
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[7],[8],[20] 0.12% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 7,388  
Ending balance $ 7,369 [1],[2],[7],[8],[20] $ 7,388 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[13],[20] 0.02% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 1,003  
Ending balance $ 1,222 [1],[2],[7],[8],[13],[20] $ 1,003 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[20] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[20] $ 1,144  
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,544 2,757
Fair Value 0 0
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 583 1,726
Fair Value $ 0 $ (9)
Investment, Identifier [Axis]: Cassipoee, SASU | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 184  
Ending balance $ 181 [1],[2],[6],[7],[8],[18] $ 184 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Castle Management Borrower, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[13],[16] 0.37%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[13],[16] $ 22,667  
Investment, Identifier [Axis]: Castle Management Borrower, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 992  
Investment, Identifier [Axis]: Castle Management Borrower, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 14,164 14,164
Fair Value 0 $ 0
Investment, Identifier [Axis]: Castle Management Borrower, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[14],[17]   0.36%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] 22,725  
Ending balance [3],[4],[12],[14],[17]   $ 22,725
Investment, Identifier [Axis]: Castle Management Borrower, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,925 2,917
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[5],[8],[13] 0.31% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 19,505  
Ending balance 19,116 [1],[2],[5],[8],[13] $ 19,505 [3],[4],[9],[12]
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 265  
Ending balance [3],[4],[9],[11],[12],[14]   $ 265
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,178 2,913
Fair Value $ (48) $ 0
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[8] 0.19% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 11,748  
Ending balance $ 11,718 [1],[2],[5],[8] $ 11,748 [3],[4],[9],[12]
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[5],[7],[8],[13] 0.09% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 5,634  
Ending balance 6,278 [1],[2],[5],[7],[8],[13] $ 5,634 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 6,235 6,235
Fair Value (16) (16)
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 493 1,152
Fair Value 0 0
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,152 1,152
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[13],[16] 1.38% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 86,330  
Ending balance $ 1,551 [1],[2],[7],[8],[13],[16] $ 86,330 [3],[4],[12],[17]
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[8],[16] 0.15% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 9,548  
Ending balance $ 13,901 [1],[2],[8],[16] $ 9,548 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[7],[8],[16] 0.22% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 13,933  
Ending balance $ 8,095 [1],[2],[7],[8],[16] $ 13,933 [3],[4],[12],[17]
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[2],[7],[8],[16] 0.13% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 8,115  
Ending balance $ 16,095 [1],[2],[7],[8],[16] $ 8,115 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[7],[8],[16] 0.26% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 16,136  
Ending balance 7,957 [1],[2],[7],[8],[16] $ 16,136 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 25,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 1.41%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 86,106  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 20,763 20,763
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 204  
Ending balance $ 200 [1],[2],[6],[7],[8],[18] $ 204 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[13],[18] 0.00% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 81  
Ending balance $ 81 [1],[2],[6],[7],[8],[13],[18] $ 81 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 76  
Ending balance $ 76 [1],[2],[6],[7],[8],[18] $ 76 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[13],[18] 0.00% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 44  
Ending balance 62 [1],[2],[6],[7],[8],[13],[18] $ 44 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Cielo Bidco, Ltd. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 17 18
Fair Value 0 0
Investment, Identifier [Axis]: Cielo Bidco, Ltd. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 81 100
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cisive Holdings Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[8],[13],[16] 0.13% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 8,126  
Ending balance 7,897 [1],[2],[8],[13],[16] $ 8,126 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: Cisive Holdings Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,111 1,111
Fair Value $ (22) $ (22)
Investment, Identifier [Axis]: Clearview Buyer, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[5],[8],[13] 0.12% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 7,182  
Ending balance 7,159 [1],[2],[5],[8],[13] $ 7,182 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Clearview Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,142 1,142
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Color Intermediate, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[5],[8] 0.32% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 19,758  
Ending balance 19,708 [1],[2],[5],[8] $ 19,758 [3],[4],[9],[12]
Investment, Identifier [Axis]: Commander Buyer, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,671 8,671
Fair Value $ (43) $ (43)
Investment, Identifier [Axis]: Commander Buyer, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[2],[5],[7],[8],[13] 0.50% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 31,454  
Ending balance 31,533 [1],[2],[5],[7],[8],[13] $ 31,454 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Commander Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,781 5,781
Fair Value $ (58) $ (58)
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[5],[8] 0.15% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 9,577  
Ending balance $ 9,553 [1],[2],[5],[8] $ 9,577 [3],[4],[9],[12]
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[13] 0.04% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 2,564  
Ending balance $ 2,656 [1],[2],[5],[7],[8],[13] $ 2,564 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[7],[8] 0.09% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 5,500  
Ending balance 5,486 [1],[2],[5],[7],[8] $ 5,500 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,531 4,531
Fair Value 0 0
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 868 965
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Community Management Holdings Parent, LP - Series A Preferred Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 341  
Ending balance 348 [1],[2],[8] $ 341 [3],[4],[12]
Investment, Identifier [Axis]: Compsych Investments Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,471 3,471
Fair Value $ (156) $ (152)
Investment, Identifier [Axis]: Compsych Investments Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[8],[13] 0.19% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 11,851  
Ending balance $ 11,816 [1],[2],[5],[8],[13] $ 11,851 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Confine Visual Bidco 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[2],[6],[7],[8],[18] 0.20% [10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[12],[19] $ 12,694  
Ending balance $ 13,369 [1],[2],[6],[7],[8],[18] $ 12,694 [10],[12],[19]
Investment, Identifier [Axis]: Confine Visual Bidco 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[18] 0.00% [10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[19] $ 303  
Ending balance $ 319 [1],[2],[6],[7],[8],[18] $ 303 [10],[11],[12],[19]
Investment, Identifier [Axis]: Confluence Technologies, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[20] 0.03% [11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [11],[12],[21] $ 2,182  
Ending balance $ 2,166 [1],[2],[7],[8],[20] $ 2,182 [11],[12],[21]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[8] 0.33% [9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[12] $ 20,820  
Ending balance $ 20,343 [1],[2],[5],[8] $ 20,820 [9],[12]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8],[13] 0.04% [9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[11],[12],[14] $ 2,308  
Ending balance $ 2,851 [1],[2],[5],[7],[8],[13] $ 2,308 [9],[11],[12],[14]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[11],[12] $ 1,115  
Ending balance $ 1,089 [1],[2],[5],[7],[8] $ 1,115 [9],[11],[12]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[11],[12],[14] $ 490  
Ending balance 639 [1],[2],[5],[7],[8],[13] $ 490 [9],[11],[12],[14]
Investment, Identifier [Axis]: Connatix Buyer, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 341 510
Fair Value 0 0
Investment, Identifier [Axis]: Connatix Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,390 3,042
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Connatix Parent, LLC - Class L Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 194  
Ending balance 75 [1],[2],[8] $ 194 [3],[4],[12]
Investment, Identifier [Axis]: Consor Intermediate II, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,361 2,361
Fair Value $ (4) $ 0
Investment, Identifier [Axis]: Consor Intermediate II, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[5],[7],[8],[13] 0.10% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 6,190  
Ending balance 6,224 [1],[2],[5],[7],[8],[13] $ 6,190 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Consor Intermediate II, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 800 854
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Continental Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.60% [1],[2],[5],[8],[13] 0.59% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 36,949  
Ending balance $ 36,829 [1],[2],[5],[8],[13] $ 36,949 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Continental Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[5],[7],[8] 0.35% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 21,855  
Ending balance 21,855 [1],[2],[5],[7],[8] $ 21,855 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Continental Buyer, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,163 4,163
Fair Value (10) (10)
Investment, Identifier [Axis]: Continental Buyer, Inc. | Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 2,715 2,715
Fair Value 0 0
Investment, Identifier [Axis]: Continental Buyer, Inc. | Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 4,350 4,350
Fair Value (22) (22)
Investment, Identifier [Axis]: Continental Buyer, Inc. | Revolver 3    
Schedule of Investments [Line Items]    
Unfunded commitments 2,081 2,081
Fair Value $ (10) $ (10)
Investment, Identifier [Axis]: Corfin Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.27% [1],[2],[5],[8] 4.18% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 261,290  
Ending balance $ 260,600 [1],[2],[5],[8] $ 261,290 [3],[4],[9],[12]
Investment, Identifier [Axis]: Corfin Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,564  
Ending balance 1,560 [1],[2],[5],[7],[8] $ 1,564 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Coupa Software, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 164 164
Fair Value $ (6) $ 0
Investment, Identifier [Axis]: Coupa Software, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[6],[7],[8],[13] 0.03% [9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[10],[11],[12],[14] $ 1,810  
Ending balance 1,790 [1],[2],[5],[6],[7],[8],[13] $ 1,810 [9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Coupa Software, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 126 126
Fair Value $ (8) $ (1)
Investment, Identifier [Axis]: Creek Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.11% [1],[2],[5],[8],[13] 1.08% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 67,597  
Ending balance 67,427 [1],[2],[5],[8],[13] $ 67,597 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Creek Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 9,893 9,893
Fair Value $ (173) $ (173)
Investment, Identifier [Axis]: Crewline Buyer, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.02% [1],[2],[8],[13],[16] 0.99% [12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [12],[14],[17] $ 61,956  
Ending balance 61,956 [1],[2],[8],[13],[16] $ 61,956 [12],[14],[17]
Investment, Identifier [Axis]: Crewline Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,438 6,438
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.16% [1],[2],[5],[8] 1.14% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 71,173  
Ending balance $ 70,462 [1],[2],[5],[8] $ 71,173 [3],[4],[9],[12]
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[5],[8] 0.24% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 14,758  
Ending balance $ 14,610 [1],[2],[5],[8] $ 14,758 [3],[4],[9],[12]
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.29% [1],[2],[5],[7],[8] 0.28% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 17,647  
Ending balance $ 17,471 [1],[2],[5],[7],[8] $ 17,647 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Crumbl Enterprises, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,484  
Ending balance 1,473 [1],[2],[5],[7],[8],[13] $ 1,484 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Crumbl Enterprises, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 120 120
Fair Value $ (1) $ (1)
Investment, Identifier [Axis]: CustomInk, LLC - Series A Preferred Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[8] 0.11% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 6,252  
Ending balance $ 6,252 [1],[2],[8] $ 6,252 [3],[4],[12]
Investment, Identifier [Axis]: CustomInk, LLC | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.90% [1],[2],[8],[16],[24] 2.82% [3],[4],[12],[17],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17],[19] $ 175,837  
Ending balance $ 175,835 [1],[2],[8],[16],[24] $ 175,837 [3],[4],[12],[17],[19]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[8],[15] 0.33% [3],[4],[9],[12],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[25] $ 20,358  
Ending balance $ 19,915 [1],[2],[5],[8],[15] $ 20,358 [3],[4],[9],[12],[25]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[15] 0.01% [3],[4],[9],[11],[12],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[25] $ 824  
Ending balance $ 804 [1],[2],[5],[7],[8],[15] $ 824 [3],[4],[9],[11],[12],[25]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[7],[8],[15] 0.11% [3],[4],[9],[11],[12],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[25] $ 6,772  
Ending balance 6,611 [1],[2],[5],[7],[8],[15] $ 6,772 [3],[4],[9],[11],[12],[25]
Investment, Identifier [Axis]: DCG Acquisition Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,724 1,724
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: DCG Acquisition Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.64% [1],[2],[5],[8],[13] 0.63% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 39,245  
Ending balance 39,245 [1],[2],[5],[8],[13] $ 39,245 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: DCG Acquisition Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,937 5,937
Fair Value $ (59) $ (59)
Investment, Identifier [Axis]: DM Intermediate Parent, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.29% [1],[2],[5],[8] 0.29% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 18,039  
Ending balance $ 17,994 [1],[2],[5],[8] $ 18,039 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: DM Intermediate Parent, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[5],[7],[8],[13] 0.08% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,727  
Ending balance $ 7,622 [1],[2],[5],[7],[8],[13] $ 4,727 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: DM Intermediate Parent, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 350  
Ending balance $ 416 [1],[2],[5],[7],[8],[13] $ 350 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: DM Intermediate Parent, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 5,421  
Investment, Identifier [Axis]: DM Intermediate Parent, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 187 3,082
Fair Value 0 0
Investment, Identifier [Axis]: DM Intermediate Parent, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 7,898 13,319
Fair Value 0 (67)
Investment, Identifier [Axis]: DM Intermediate Parent, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,790 4,790
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: DTA Intermediate II, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.70% [1],[2],[8],[16] 0.68% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 42,431  
Ending balance $ 42,431 [1],[2],[8],[16] $ 42,431 [3],[4],[12],[17]
Investment, Identifier [Axis]: DTA Intermediate II, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[8],[13],[16] 0.17% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 10,713  
Ending balance $ 10,713 [1],[2],[8],[13],[16] $ 10,713 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: DTA Intermediate II, Ltd. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.37% [1],[2],[7],[8],[16] 0.37% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 23,176  
Ending balance 22,700 [1],[2],[7],[8],[16] $ 23,176 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: DTA Intermediate II, Ltd. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,769 10,769
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: DTA, LP - Class A Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[8] 0.07% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 4,064  
Ending balance $ 4,064 [1],[2],[8] $ 4,064 [3],[4],[12]
Investment, Identifier [Axis]: Daylight Beta Parent, LLC (Benefytt Technologies, Inc.) | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[15],[18],[24] 0.01% [3],[4],[11],[12],[19],[25],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[19],[25],[26] $ 921  
Ending balance 921 [1],[2],[7],[8],[15],[18],[24] $ 921 [3],[4],[11],[12],[19],[25],[26]
Investment, Identifier [Axis]: Dellner Couplers Group, AB | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[19]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[19] $ 1,179  
Ending balance [3],[4],[10],[11],[19]   $ 1,179
Investment, Identifier [Axis]: Denali Bidco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[13],[18] 0.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[13],[18] $ 23,130  
Investment, Identifier [Axis]: Denali Bidco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[18] 0.62%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[18] $ 37,595  
Investment, Identifier [Axis]: Denali Bidco, Ltd. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10],[11],[12],[14],[19]   0.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[14],[19] 23,674  
Ending balance [10],[11],[12],[14],[19]   $ 23,674
Investment, Identifier [Axis]: Denali Bidco, Ltd. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10],[11],[12],[19]   0.58%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[19] 36,508  
Ending balance [10],[11],[12],[19]   $ 36,508
Investment, Identifier [Axis]: Denali Bidco, Ltd. 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10],[11],[12],[19]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[19] 1,909  
Ending balance [10],[11],[12],[19]   $ 1,909
Investment, Identifier [Axis]: Denali Bidco, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 300 300
Fair Value $ (3) $ (3)
Investment, Identifier [Axis]: Denali Holdco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.27% [1],[2],[6],[7],[8],[18] 0.26% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 16,188  
Ending balance $ 16,229 [1],[2],[6],[7],[8],[18] $ 16,188 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Denali Holdco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[6],[7],[8],[18] 0.17% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 10,737  
Ending balance $ 10,784 [1],[2],[6],[7],[8],[18] $ 10,737 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[5],[6],[7],[8],[13] 0.15% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 9,137  
Ending balance 9,126 [1],[2],[5],[6],[7],[8],[13] $ 9,137 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 924 924
Fair Value 0 (9)
Investment, Identifier [Axis]: Denali TopCo, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,977 4,977
Fair Value $ (25) $ (25)
Investment, Identifier [Axis]: Denali TopCo, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.27% [1],[2],[5],[7],[8],[13] 0.27% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 16,800  
Ending balance 16,716 [1],[2],[5],[7],[8],[13] $ 16,800 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Denali TopCo, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,389 2,389
Fair Value $ (12) $ (12)
Investment, Identifier [Axis]: Descartes Holdings, Inc. - Class A Common Stock | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[12]
Investment, Identifier [Axis]: Diligent Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.81% [1],[2],[5],[8] 0.80% [9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[12] $ 49,683  
Ending balance $ 49,683 [1],[2],[5],[8] $ 49,683 [9],[12]
Investment, Identifier [Axis]: Diligent Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[5],[8] 0.14% [9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[12] $ 8,517  
Ending balance $ 8,517 [1],[2],[5],[8] $ 8,517 [9],[12]
Investment, Identifier [Axis]: Discovery Education, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.46% [1],[2],[5],[8] 0.46% [9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[12] $ 28,724  
Ending balance $ 27,774 [1],[2],[5],[8] $ 28,724 [9],[12]
Investment, Identifier [Axis]: Discovery Education, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.02% [9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[11],[12],[14] $ 1,478  
Ending balance $ 709 [1],[2],[5],[7],[8],[13] $ 1,478 [9],[11],[12],[14]
Investment, Identifier [Axis]: Discovery Education, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8] 0.05% [9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[11],[12] $ 3,232  
Ending balance 3,125 [1],[2],[5],[7],[8] $ 3,232 [9],[11],[12]
Investment, Identifier [Axis]: Discovery Education, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,644 987
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Divisions Holding Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[13] 0.03% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,605  
Ending balance 1,601 [1],[2],[5],[7],[8],[13] $ 1,605 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Divisions Holding Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 140 140
Fair Value (1) (1)
Investment, Identifier [Axis]: Doit International, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,606 11,606
Fair Value $ (87) $ (87)
Investment, Identifier [Axis]: Doit International, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[7],[8],[13],[16] 0.18% [11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [11],[12],[14],[17] $ 11,432  
Ending balance 11,403 [1],[2],[7],[8],[13],[16] $ 11,432 [11],[12],[14],[17]
Investment, Identifier [Axis]: Doit International, Ltd. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,803 5,803
Fair Value $ 0 0
Investment, Identifier [Axis]: Dropbox, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   44,118
Fair Value   $ (221)
Investment, Identifier [Axis]: Dropbox, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.99% [1],[2],[5],[6],[8],[24] 1.25% [9],[10],[12],[14],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [9],[10],[12],[14],[26] $ 77,905  
Ending balance 121,494 [1],[2],[5],[6],[8],[24] $ 77,905 [9],[10],[12],[14],[26]
Investment, Identifier [Axis]: Duro Dyne National Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,002 6,002
Fair Value $ (30) $ (30)
Investment, Identifier [Axis]: Duro Dyne National Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.46% [1],[2],[5],[8],[13] 0.45% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 28,356  
Ending balance 28,285 [1],[2],[5],[8],[13] $ 28,356 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Duro Dyne National Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,002 6,002
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Dwyer Instruments, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[5],[7],[8],[13] 0.15% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 9,676  
Ending balance 9,761 [1],[2],[5],[7],[8],[13] $ 9,676 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Dwyer Instruments, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 712 823
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: EIS Acquisition Holdings, LP - Class A Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[8] 0.12% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 7,796  
Ending balance 5,781 [1],[2],[8] $ 7,796 [3],[4],[12]
Investment, Identifier [Axis]: ELK Bidco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,747 3,747
Fair Value $ (9) $ (9)
Investment, Identifier [Axis]: ELK Bidco, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.29% [1],[2],[7],[8],[13],[20] 0.29% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 17,871  
Ending balance 17,871 [1],[2],[7],[8],[13],[20] $ 17,871 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: ELK Bidco, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,373 3,373
Fair Value $ (17) $ (17)
Investment, Identifier [Axis]: EMB Purchaser, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.45% [1],[2],[5],[8] 0.44% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 27,315  
Ending balance $ 27,247 [1],[2],[5],[8] $ 27,315 [3],[4],[9],[12]
Investment, Identifier [Axis]: EMB Purchaser, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[5],[7],[8],[13] 0.16% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 9,715  
Ending balance $ 12,216 [1],[2],[5],[7],[8],[13] $ 9,715 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: EMB Purchaser, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 1,098  
Investment, Identifier [Axis]: EMB Purchaser, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,182 6,681
Fair Value 0 0
Investment, Identifier [Axis]: EMB Purchaser, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,196 3,294
Fair Value $ 0 $ (33)
Investment, Identifier [Axis]: ENV Bidco, AB 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[6],[7],[8] 0.02% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 1,115  
Ending balance $ 1,110 [1],[2],[5],[6],[7],[8] $ 1,115 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: ENV Bidco, AB 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[6],[7],[8],[13],[18] 0.03% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 1,567  
Ending balance 1,533 [1],[2],[6],[7],[8],[13],[18] $ 1,567 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: ENV Bidco, AB | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 311 302
Fair Value (4) (4)
Investment, Identifier [Axis]: Eagan Parent, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 90 90
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Eagan Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[13],[20] 0.01% [11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [11],[12],[14],[21] $ 360  
Ending balance 359 [1],[2],[7],[8],[13],[20] $ 360 [11],[12],[14],[21]
Investment, Identifier [Axis]: Eagan Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 48 48
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Eagle Midstream Canada Finance, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.71% [1],[2],[5],[6],[8] 0.69% [3],[4],[9],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12] $ 43,141  
Ending balance 43,141 [1],[2],[5],[6],[8] $ 43,141 [3],[4],[9],[10],[12]
Investment, Identifier [Axis]: East River Bidco, GmbH | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 31 31
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: East River Bidco, GmbH | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[13],[18] 0.00% [3],[4],[10],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[19] $ 112  
Ending balance $ 110 [1],[2],[6],[7],[8],[13],[18] $ 112 [3],[4],[10],[12],[14],[19]
Investment, Identifier [Axis]: Eden Acquisitionco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.59% [1],[2],[5],[6],[8],[13] 0.57% [3],[4],[9],[10],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12],[14] $ 35,898  
Ending balance $ 35,901 [1],[2],[5],[6],[8],[13] $ 35,898 [3],[4],[9],[10],[12],[14]
Investment, Identifier [Axis]: Eden Acquisitionco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[6],[7],[8],[18] 0.09% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 5,521  
Ending balance 5,430 [1],[2],[6],[7],[8],[18] $ 5,521 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Eden Acquisitionco, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 13,505 13,505
Fair Value (180) (183)
Investment, Identifier [Axis]: Edison Bidco, AS | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 687 687
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Edison Bidco, AS | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[13],[18] 0.01% [10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[14],[19] $ 406  
Ending balance $ 399 [1],[2],[6],[7],[8],[13],[18] $ 406 [10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Electro Switch Business Trust, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.51% [1],[2],[5],[8],[13] 0.50% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 31,143  
Ending balance 31,065 [1],[2],[5],[8],[13] $ 31,143 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Electro Switch Business Trust, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,345 4,345
Fair Value $ (43) $ (43)
Investment, Identifier [Axis]: Elements Finco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[18] 0.08% [10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[19] $ 5,046  
Ending balance $ 5,046 [1],[2],[6],[7],[8],[18] $ 5,046 [10],[11],[12],[19]
Investment, Identifier [Axis]: Elements Finco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[6],[7],[8],[18] 0.43% [10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[19] $ 26,750  
Ending balance $ 26,429 [1],[2],[6],[7],[8],[18] $ 26,750 [10],[11],[12],[19]
Investment, Identifier [Axis]: Elements Finco, Ltd. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[6],[8],[18] 0.10% [10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[12],[19] $ 6,198  
Ending balance $ 6,233 [1],[2],[6],[8],[18] $ 6,198 [10],[12],[19]
Investment, Identifier [Axis]: Elements Finco, Ltd. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[6],[7],[8],[18] 0.19% [10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[19] $ 11,991  
Ending balance $ 11,848 [1],[2],[6],[7],[8],[18] $ 11,991 [10],[11],[12],[19]
Investment, Identifier [Axis]: Elements Finco, Ltd. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[18] 0.08% [10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [10],[11],[12],[19] $ 4,922  
Ending balance 4,860 [1],[2],[6],[7],[8],[18] $ 4,922 [10],[11],[12],[19]
Investment, Identifier [Axis]: Emergency Power Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,864 2,864
Fair Value $ (4) $ 0
Investment, Identifier [Axis]: Emergency Power Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.99% [1],[2],[8],[13],[16] 0.96% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 60,254  
Ending balance $ 60,094 [1],[2],[8],[13],[16] $ 60,254 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[8],[16] 0.32% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 20,112  
Ending balance $ 19,898 [1],[2],[8],[16] $ 20,112 [3],[4],[12],[17]
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[13],[16] 0.06% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 3,702  
Ending balance 3,663 [1],[2],[7],[8],[13],[16] $ 3,702 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 9,765 9,765
Fair Value $ 0 0
Investment, Identifier [Axis]: Essential Services Holding Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 11,442  
Investment, Identifier [Axis]: Essential Services Holding Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 542  
Investment, Identifier [Axis]: Essential Services Holding Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,297 2,297
Fair Value (11) $ (11)
Investment, Identifier [Axis]: Essential Services Holding Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] 12,148  
Ending balance [3],[4],[9],[12],[14]   $ 12,148
Investment, Identifier [Axis]: Essential Services Holding Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 861 861
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Everbridge Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[5],[6],[8] 0.35% [3],[4],[9],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12] $ 22,000  
Ending balance $ 21,944 [1],[2],[5],[6],[8] $ 22,000 [3],[4],[9],[10],[12]
Investment, Identifier [Axis]: Everbridge Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[6],[7],[8],[13] 0.03% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 2,156  
Ending balance 2,151 [1],[2],[5],[6],[7],[8],[13] $ 2,156 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Everbridge Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,378 3,378
Fair Value 0 0
Investment, Identifier [Axis]: Everbridge Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,222 2,222
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class A Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 53  
Ending balance $ 50 [1],[2],[8] $ 53 [3],[4],[12]
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class B Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 19  
Ending balance $ 16 [1],[2],[8] $ 19 [3],[4],[12]
Investment, Identifier [Axis]: Experity, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[5],[8] 0.20% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 12,227  
Ending balance $ 12,172 [1],[2],[5],[8] $ 12,227 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Experity, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[5],[7],[8],[13] 0.06% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 3,922  
Ending balance 3,889 [1],[2],[5],[7],[8],[13] $ 3,922 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Experity, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,457 4,457
Fair Value (22) (22)
Investment, Identifier [Axis]: Experity, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,495 1,495
Fair Value $ (15) 0
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.46%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 27,948  
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 614  
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,169 2,169
Fair Value (16) $ (16)
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   0.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] 27,963  
Ending balance [3],[4],[9],[12],[14]   $ 27,963
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,035 2,502
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Falcon Top Parent, LLC - Class A Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.02% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 773  
Ending balance $ 773 [1],[2],[8] $ 773 [3],[4],[12]
Investment, Identifier [Axis]: Fastener Distribution Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[2],[5],[8] 0.49% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 30,705  
Ending balance $ 30,627 [1],[2],[5],[8] $ 30,705 [3],[4],[9],[12]
Investment, Identifier [Axis]: Fastener Distribution Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[8],[13] 0.07% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 4,458  
Ending balance 4,447 [1],[2],[5],[8],[13] $ 4,458 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Fastener Distribution Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,125 7,125
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Fencing Supply Group Acquisition, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.86% [1],[2],[8],[16] 0.81% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 50,496  
Ending balance $ 52,246 [1],[2],[8],[16] $ 50,496 [3],[4],[12],[17]
Investment, Identifier [Axis]: Fern Bidco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.44% [1],[2],[6],[7],[8],[18] 0.43% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 26,908  
Ending balance $ 26,556 [1],[2],[6],[7],[8],[18] $ 26,908 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Fern Bidco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[13],[18] 0.04% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 2,756  
Ending balance 2,773 [1],[2],[6],[7],[8],[13],[18] $ 2,756 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Fern Bidco, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,035 10,035
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Fidelity Investments Money Market Treasury Portfolio - Class I    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2] $ 2  
Investment, Identifier [Axis]: Firmus Supercloud Pty Ltd | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 77,858  
Fair Value $ 0  
Investment, Identifier [Axis]: Flexera Software, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[7],[8],[20] 0.18% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 11,429  
Ending balance $ 11,213 [1],[2],[7],[8],[20] $ 11,429 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Flexera Software, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[7],[8],[13],[20] 0.52% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 32,220  
Ending balance 32,139 [1],[2],[7],[8],[13],[20] $ 32,220 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: Flexera Software, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,473 2,473
Fair Value $ (6) $ (6)
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[5],[8] 0.23% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 14,285  
Ending balance $ 14,247 [1],[2],[5],[8] $ 14,285 [3],[4],[9],[12]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8] 0.08% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 4,735  
Ending balance $ 4,723 [1],[2],[5],[8] $ 4,735 [3],[4],[9],[12]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[8] 0.11% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 6,822  
Ending balance $ 6,805 [1],[2],[5],[8] $ 6,822 [3],[4],[9],[12]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[7],[8],[13] 0.09% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 5,509  
Ending balance $ 5,302 [1],[2],[5],[7],[8],[13] $ 5,509 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8],[13] 0.07% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,164  
Ending balance $ 4,987 [1],[2],[5],[7],[8],[13] $ 4,164 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 2,034  
Ending balance $ 2,029 [1],[2],[5],[7],[8] $ 2,034 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 7 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 951  
Ending balance 948 [1],[2],[5],[7],[8] $ 951 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,142 2,975
Fair Value 0 0
Investment, Identifier [Axis]: Foundation Risk Partners Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,332 3,076
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[13] 0.04% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 2,355  
Ending balance $ 2,336 [1],[2],[5],[7],[8],[13] $ 2,355 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 347  
Ending balance $ 348 [1],[2],[5],[7],[8] $ 347 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8] 0.00% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 90  
Ending balance 90 [1],[2],[5],[7],[8] $ 90 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 464 439
Fair Value 0 $ 0
Investment, Identifier [Axis]: Frontline Road Safety, LLC 1 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[19]   0.24%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[19] $ 15,199  
Ending balance [3],[4],[12],[19]   $ 15,199
Investment, Identifier [Axis]: Frontline Road Safety, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[18] 0.25%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[18] $ 15,285  
Investment, Identifier [Axis]: Frontline Road Safety, LLC 2 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[19]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[19] $ 4,446  
Ending balance [3],[4],[11],[12],[14],[19]   $ 4,446
Investment, Identifier [Axis]: Frontline Road Safety, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[18] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[18] $ 4,472  
Investment, Identifier [Axis]: Frontline Road Safety, LLC 3 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[19]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[19] $ 4,723  
Ending balance [3],[4],[11],[12],[19]   $ 4,723
Investment, Identifier [Axis]: Frontline Road Safety, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[18] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[18] $ 4,751  
Investment, Identifier [Axis]: Frontline Road Safety, LLC 4 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[19]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[19] $ 2,075  
Ending balance [3],[4],[11],[12],[14],[19]   $ 2,075
Investment, Identifier [Axis]: Frontline Road Safety, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[18] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[18] $ 2,745  
Investment, Identifier [Axis]: Frontline Road Safety, LLC 5 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[19]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[19] $ 2,798  
Ending balance [3],[4],[11],[12],[19]   $ 2,798
Investment, Identifier [Axis]: Frontline Road Safety, LLC 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[18] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[18] $ 2,814  
Investment, Identifier [Axis]: Frontline Road Safety, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,633 3,289
Fair Value 0 0
Investment, Identifier [Axis]: Frontline Road Safety, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,565 2,565
Fair Value $ (13) $ (13)
Investment, Identifier [Axis]: FusionSite Midco, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.93% [1],[2],[8],[16] 0.92% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 57,536  
Ending balance $ 56,818 [1],[2],[8],[16] $ 57,536 [3],[4],[12],[17]
Investment, Identifier [Axis]: FusionSite Midco, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[2],[7],[8],[13],[16] 0.30% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 18,534  
Ending balance $ 18,408 [1],[2],[7],[8],[13],[16] $ 18,534 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: FusionSite Midco, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 2,849  
Investment, Identifier [Axis]: FusionSite Midco, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,034 5,034
Fair Value 0 0
Investment, Identifier [Axis]: FusionSite Midco, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,087 7,006
Fair Value $ 0 $ (158)
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.55% [1],[2],[5],[8] 0.54% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 33,440  
Ending balance $ 33,356 [1],[2],[5],[8] $ 33,440 [3],[4],[9],[12]
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[5],[7],[8] 0.33% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 20,561  
Ending balance $ 20,509 [1],[2],[5],[7],[8] $ 20,561 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8],[13] 0.07% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,662  
Ending balance 4,650 [1],[2],[5],[7],[8],[13] $ 4,662 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,734
Fair Value   0
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,288 3,288
Fair Value $ (66) $ (66)
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[5],[8] 0.33% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 20,538  
Ending balance $ 20,590 [1],[2],[5],[8] $ 20,538 [3],[4],[9],[12]
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[8] 0.08% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 5,202  
Ending balance $ 5,215 [1],[2],[5],[8] $ 5,202 [3],[4],[9],[12]
Investment, Identifier [Axis]: GCX Corporation Group Holdings, L.P. - Class A-2 Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 243  
Ending balance $ 202 [1],[2],[8] $ 243 [3],[4],[12]
Investment, Identifier [Axis]: GFT Infrastructure, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 1.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 63,968  
Investment, Identifier [Axis]: GFT Infrastructure, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 2,464  
Investment, Identifier [Axis]: GFT Infrastructure, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,742  
Fair Value 0  
Investment, Identifier [Axis]: GGG Midco LLC | Delayed Draw    
Schedule of Investments [Line Items]    
Unfunded commitments 2,948  
Fair Value 0  
Investment, Identifier [Axis]: GGG Midco LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,445  
Fair Value 0  
Investment, Identifier [Axis]: GGG Midco LLC | Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,167  
Fair Value $ 0  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[2],[5],[8],[13] 0.26% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 16,294  
Ending balance 15,621 [1],[2],[5],[8],[13] $ 16,294 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 720 1,040
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: GS Acquisitionco, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[13] 0.03% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,668  
Ending balance $ 1,983 [1],[2],[5],[7],[8],[13] $ 1,668 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: GS Acquisitionco, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[7],[8],[16] 0.08% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 5,223  
Ending balance 5,196 [1],[2],[7],[8],[16] $ 5,223 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,429  
Fair Value (4)  
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   1,653
Fair Value   0
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   1,429
Fair Value   (4)
Investment, Identifier [Axis]: GS Acquisitionco, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 951 1,259
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: GTCR Investors, LP - Class A-1 Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 619  
Ending balance $ 619 [1],[2],[8] $ 619 [3],[4],[12]
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Blocker Note | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 6  
Ending balance $ 6 [1],[2],[8] $ 6 [3],[4],[12]
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Class Z Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 69  
Ending balance $ 69 [1],[2],[8] $ 69 [3],[4],[12]
Investment, Identifier [Axis]: Galileo Pharma Bidco S.p.A | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,162
Fair Value   $ 0
Investment, Identifier [Axis]: Galileo Pharma Bidco S.p.A | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[6],[7],[8],[18] 0.09% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 5,745  
Ending balance $ 5,650 [1],[2],[6],[7],[8],[18] $ 5,745 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Galway Borrower, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[5],[7],[8] 0.23% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 14,623  
Ending balance $ 14,586 [1],[2],[5],[7],[8] $ 14,623 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Galway Borrower, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[5],[7],[8],[13] 0.03% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,664  
Ending balance $ 3,533 [1],[2],[5],[7],[8],[13] $ 1,664 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Galway Borrower, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[2],[5],[7],[8] 0.17% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 10,839  
Ending balance 13,250 [1],[2],[5],[7],[8] $ 10,839 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Galway Borrower, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   42,246
Fair Value   0
Investment, Identifier [Axis]: Galway Borrower, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,641 7,510
Fair Value 0 $ 0
Investment, Identifier [Axis]: Gannett Fleming, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   1.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 64,035  
Ending balance [3],[4],[9],[12],[14]   $ 64,035
Investment, Identifier [Axis]: Gannett Fleming, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   6,237
Fair Value   $ (94)
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.69% [1],[2],[5],[8] 0.69% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 42,792  
Ending balance $ 42,355 [1],[2],[5],[8] $ 42,792 [3],[4],[9],[12]
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8],[13] 0.05% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 3,069  
Ending balance 2,852 [1],[2],[5],[7],[8],[13] $ 3,069 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,218 7,218
Fair Value 0 0
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,175 3,069
Fair Value $ (111) $ 0
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Blocker Note | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 9  
Ending balance $ 9 [1],[2],[8] $ 9 [3],[4],[12]
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Blocker Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 403  
Ending balance $ 401 [1],[2],[8] $ 403 [3],[4],[12]
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Class Z Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 96  
Ending balance $ 96 [1],[2],[8] $ 96 [3],[4],[12]
Investment, Identifier [Axis]: Genuine Cable Group, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.67% [1],[2],[5],[8] 2.57% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 160,663  
Ending balance 163,119 [1],[2],[5],[8] $ 160,663 [3],[4],[9],[12]
Investment, Identifier [Axis]: Gigamon, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] 6,995  
Ending balance [3],[4],[9],[12]   $ 6,995
Investment, Identifier [Axis]: Gigamon, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 164  
Ending balance [3],[4],[9],[11],[12],[14]   $ 164
Investment, Identifier [Axis]: Gigamon, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 6,966  
Investment, Identifier [Axis]: Gigamon, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 437 262
Fair Value $ (11) $ 0
Investment, Identifier [Axis]: Gimlet Bidco, GmbH 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.58% [1],[2],[6],[8],[18] 0.58% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 35,985  
Ending balance $ 35,392 [1],[2],[6],[8],[18] $ 35,985 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: Gimlet Bidco, GmbH 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[6],[8],[18] 0.22% [3],[4],[10],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[19] $ 13,855  
Ending balance $ 14,419 [1],[2],[6],[8],[18] $ 13,855 [3],[4],[10],[12],[14],[19]
Investment, Identifier [Axis]: Gimlet Bidco, GmbH 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[13],[18] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[13],[18] $ 3,904  
Investment, Identifier [Axis]: Gimlet Bidco, GmbH | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 32,166  
Fair Value $ 0  
Investment, Identifier [Axis]: Gimlet Bidco, GmbH | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   564
Fair Value   0
Investment, Identifier [Axis]: Gimlet Bidco, GmbH | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   36,015
Fair Value   $ (186)
Investment, Identifier [Axis]: Go Car Wash Management Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[2],[8],[16] 0.34% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 21,494  
Ending balance $ 21,438 [1],[2],[8],[16] $ 21,494 [3],[4],[12],[17]
Investment, Identifier [Axis]: Gorilla Investor, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.40% [1],[2],[5],[8] 0.39% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 24,324  
Ending balance $ 24,129 [1],[2],[5],[8] $ 24,324 [3],[4],[9],[12]
Investment, Identifier [Axis]: Granicus, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.29% [1],[2],[5],[8] 0.28% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 17,733  
Ending balance $ 17,779 [1],[2],[5],[8] $ 17,733 [3],[4],[9],[12]
Investment, Identifier [Axis]: Granicus, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[8],[13] 0.08% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 5,197  
Ending balance 5,211 [1],[2],[5],[8],[13] $ 5,197 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Granicus, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 388 388
Fair Value (4) 0
Investment, Identifier [Axis]: Granicus, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,448 2,448
Fair Value $ 0 0
Investment, Identifier [Axis]: Grid Alliance Partners, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 19,290  
Investment, Identifier [Axis]: Grid Alliance Partners, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 216  
Investment, Identifier [Axis]: Grid Alliance Partners, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 725 4,585
Fair Value (5) $ (46)
Investment, Identifier [Axis]: Grid Alliance Partners, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 15,476  
Ending balance [3],[4],[9],[11],[12],[14]   $ 15,476
Investment, Identifier [Axis]: Grid Alliance Partners, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,740 2,979
Fair Value $ 0 $ (30)
Investment, Identifier [Axis]: Griffon Aggregator, Ltd. - LP Interest | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 660  
Ending balance 690 [1],[2],[8] $ 660 [3],[4],[12]
Investment, Identifier [Axis]: Griffon Bidco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,072 4,072
Fair Value $ (20) $ 0
Investment, Identifier [Axis]: Griffon Bidco, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.37% [1],[2],[5],[8],[13] 0.36% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 22,333  
Ending balance 22,277 [1],[2],[5],[8],[13] $ 22,333 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Griffon Bidco, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,072 4,072
Fair Value $ (41) $ (41)
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 15  
Ending balance $ 2,936 [1],[2],[5],[7],[8] $ 15 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[13] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 72  
Ending balance $ 15 [1],[2],[5],[7],[8],[13] $ 72 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 72  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 497 497
Fair Value 0 $ 0
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] 2,944  
Ending balance [3],[4],[9],[11],[12]   $ 2,944
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 288 288
Fair Value 0 0
Investment, Identifier [Axis]: Guardian Bidco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 711 711
Fair Value $ (7) $ (7)
Investment, Identifier [Axis]: Guardian Bidco, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[7],[8],[13],[18] 0.08% [3],[4],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[19] $ 5,246  
Ending balance $ 5,246 [1],[2],[7],[8],[13],[18] $ 5,246 [3],[4],[11],[12],[14],[19]
Investment, Identifier [Axis]: Guidehouse, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.14% [1],[2],[5],[8] 5.03% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 314,311  
Ending balance 313,544 [1],[2],[5],[8] $ 314,311 [3],[4],[9],[12]
Investment, Identifier [Axis]: Gusto Sing Bidco Pte, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 101 101
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Gusto Sing Bidco Pte, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[6],[7],[8],[13] 0.01% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 664  
Ending balance $ 687 [1],[2],[5],[6],[7],[8],[13] $ 664 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Harp Finco, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[6],[7],[8],[18] 0.31% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 19,263  
Ending balance $ 19,203 [1],[2],[6],[7],[8],[18] $ 19,263 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC - Preferred Interest | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 266  
Ending balance 39 [1],[2],[8] $ 266 [3],[4],[12]
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   1.55%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] 97,045  
Ending balance [3],[4],[9],[12]   $ 97,045
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[19]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[19] $ 12,278  
Ending balance [3],[4],[11],[12],[19]   $ 12,278
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC 2| Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[18] 0.20%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[18] $ 12,502  
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 1.58%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 96,502  
Investment, Identifier [Axis]: Helix TS, LLC 1 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   0.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 34,026  
Ending balance [3],[4],[9],[12]   $ 34,026
Investment, Identifier [Axis]: Helix TS, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.56%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 33,939  
Investment, Identifier [Axis]: Helix TS, LLC 2 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 20,442  
Ending balance [3],[4],[9],[12]   $ 20,442
Investment, Identifier [Axis]: Helix TS, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.33%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 20,389  
Investment, Identifier [Axis]: Helix TS, LLC 3 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 3,700  
Ending balance [3],[4],[9],[11],[12]   $ 3,700
Investment, Identifier [Axis]: Helix TS, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 3,691  
Investment, Identifier [Axis]: Helix TS, LLC 4 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 963  
Ending balance [3],[4],[9],[11],[12]   $ 963
Investment, Identifier [Axis]: Helix TS, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 960  
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[16] 0.08% [3],[4],[10],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[17] $ 4,925  
Ending balance $ 4,913 [1],[2],[6],[7],[8],[16] $ 4,925 [3],[4],[10],[11],[12],[17]
Investment, Identifier [Axis]: High Street Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[8] 0.16% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 10,226  
Ending balance $ 10,199 [1],[2],[5],[8] $ 10,226 [3],[4],[9],[12]
Investment, Identifier [Axis]: High Street Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.27% [1],[2],[5],[8],[13] 1.24% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 77,686  
Ending balance $ 77,520 [1],[2],[5],[8],[13] $ 77,686 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: High Street Buyer, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[2],[5],[8] 0.22% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 13,499  
Ending balance $ 13,464 [1],[2],[5],[8] $ 13,499 [3],[4],[9],[12]
Investment, Identifier [Axis]: High Street Buyer, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8],[13] 0.05% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 2,847  
Ending balance 4,271 [1],[2],[5],[7],[8],[13] $ 2,847 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: High Street Buyer, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 24,141 25,572
Fair Value 0 0
Investment, Identifier [Axis]: High Street Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,254 2,254
Fair Value $ (45) $ (45)
Investment, Identifier [Axis]: Home Service TopCo IV, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.60% [1],[2],[8],[13],[16] 0.59% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 36,912  
Ending balance $ 36,817 [1],[2],[8],[13],[16] $ 36,912 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: Home Service TopCo IV, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[7],[8],[16] 0.05% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 2,888  
Ending balance $ 2,881 [1],[2],[7],[8],[16] $ 2,888 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: Home Service TopCo IV, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[16] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[16] $ 2,617  
Investment, Identifier [Axis]: Home Service TopCo IV, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,509 3,509
Fair Value $ (38) $ (38)
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[5],[8] 0.24% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 15,096  
Ending balance $ 15,209 [1],[2],[5],[8] $ 15,096 [3],[4],[9],[12]
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[8] 0.11% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 6,878  
Ending balance $ 6,930 [1],[2],[5],[8] $ 6,878 [3],[4],[9],[12]
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[8] 0.09% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 5,607  
Ending balance $ 5,649 [1],[2],[5],[8] $ 5,607 [3],[4],[9],[12]
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,291  
Ending balance 1,288 [1],[2],[5],[7],[8],[13] $ 1,291 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 206 206
Fair Value 0 0
Investment, Identifier [Axis]: IEM New Sub 2, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 13,164 13,164
Fair Value (99) (99)
Investment, Identifier [Axis]: IEM New Sub 2, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 11,010 11,010
Fair Value $ (28) $ 0
Investment, Identifier [Axis]: IEM New Sub 2, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.87% [1],[2],[8],[13],[20] 1.83% [3],[4],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[21] $ 114,102  
Ending balance $ 113,809 [1],[2],[8],[13],[20] $ 114,102 [3],[4],[12],[14],[21]
Investment, Identifier [Axis]: IG Investments Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.75% [1],[2],[5],[8],[13] 0.73% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 45,883  
Ending balance 45,768 [1],[2],[5],[8],[13] $ 45,883 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: IG Investments Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,416 4,416
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: INK BC Bidco S.p.A. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.40% [1],[2],[6],[8],[18] 0.05% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 3,248  
Ending balance $ 24,633 [1],[2],[6],[8],[18] $ 3,248 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: INK BC Bidco S.p.A. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[6],[8],[13],[18] 0.04% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 2,555  
Ending balance $ 1,615 [1],[2],[6],[8],[13],[18] $ 2,555 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: INK BC Bidco S.p.A. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[18] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[18] $ 3,366  
Investment, Identifier [Axis]: INK BC Bidco S.p.A. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[18] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[18] $ 2,513  
Investment, Identifier [Axis]: INK BC Bidco S.p.A. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,483 4,166
Fair Value 0 $ (42)
Investment, Identifier [Axis]: INK BC Bidco S.p.A. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[14],[19]   0.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[19] $ 25,003  
Ending balance [3],[4],[10],[12],[14],[19]   $ 25,003
Investment, Identifier [Axis]: IQN Holding Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8] 0.08% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 4,933  
Ending balance $ 4,947 [1],[2],[5],[8] $ 4,933 [3],[4],[9],[12]
Investment, Identifier [Axis]: IQN Holding Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 384  
Ending balance $ 345 [1],[2],[5],[7],[8],[13] $ 384 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: IQN Holding Corp. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 610  
Ending balance 615 [1],[2],[5],[7],[8] $ 610 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: IQN Holding Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 246 207
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: IRI Group Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.24% [1],[2],[5],[8],[13] 3.16% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 197,537  
Ending balance 197,537 [1],[2],[5],[8],[13] $ 197,537 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: IRI Group Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 14,316 14,316
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 995  
Ending balance $ 992 [1],[2],[5],[7],[8],[13] $ 995 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[13] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 37  
Ending balance 37 [1],[2],[5],[7],[8],[13] $ 37 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 151 151
Fair Value (1) 0
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 54 54
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Icefall Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.65% [1],[2],[8],[13],[16] 0.63% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 39,632  
Ending balance 39,632 [1],[2],[8],[13],[16] $ 39,632 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: Icefall Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,897 3,897
Fair Value 0 0
Investment, Identifier [Axis]: Imagine 360, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,413 2,413
Fair Value $ (12) $ (12)
Investment, Identifier [Axis]: Imagine 360, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[5],[8],[13] 0.27% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 16,956  
Ending balance 16,913 [1],[2],[5],[8],[13] $ 16,956 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Imagine 360, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,514 1,514
Fair Value (15) (15)
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,488 10,488
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.78% [1],[2],[5],[8],[13] 0.74% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 46,496  
Ending balance $ 47,427 [1],[2],[5],[8],[13] $ 46,496 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   728
Fair Value   $ 0
Investment, Identifier [Axis]: Infostretch Corporation | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8] 0.07% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 4,270  
Ending balance 4,259 [1],[2],[5],[7],[8] $ 4,270 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Inovalon Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   2.96%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 184,968  
Ending balance [3],[4],[9],[12]   $ 184,968
Investment, Identifier [Axis]: Inovalon Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[5],[8] 0.25% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 15,685  
Ending balance $ 14,850 [1],[2],[5],[8] $ 15,685 [3],[4],[9],[12]
Investment, Identifier [Axis]: Inovalon Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 2.93%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 178,817  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 9,278 9,278
Fair Value $ 0 $ (16)
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.68% [1],[2],[5],[8],[13] 2.63% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 163,941  
Ending balance 163,542 [1],[2],[5],[8],[13] $ 163,941 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,791 2,791
Fair Value $ (14) $ (14)
Investment, Identifier [Axis]: Investment Eight    
Schedule of Investments [Line Items]    
Interest rate, floor 3.00% 3.00%
Investment, Identifier [Axis]: Investment Five    
Schedule of Investments [Line Items]    
Interest rate, floor 1.25% 1.25%
Investment, Identifier [Axis]: Investment Four    
Schedule of Investments [Line Items]    
Interest rate, floor 1.00% 1.00%
Investment, Identifier [Axis]: Investment One    
Schedule of Investments [Line Items]    
Interest rate, floor 0.00% 0.00%
Investment, Identifier [Axis]: Investment Seven    
Schedule of Investments [Line Items]    
Interest rate, floor 2.00% 2.00%
Investment, Identifier [Axis]: Investment Six    
Schedule of Investments [Line Items]    
Interest rate, floor 1.50% 1.50%
Investment, Identifier [Axis]: Investment Three    
Schedule of Investments [Line Items]    
Interest rate, floor 0.75% 0.75%
Investment, Identifier [Axis]: Investment Two    
Schedule of Investments [Line Items]    
Interest rate, floor 0.50% 0.50%
Investment, Identifier [Axis]: Iris Buyer, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[8],[16] 0.40% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 25,196  
Ending balance $ 25,131 [1],[2],[8],[16] $ 25,196 [3],[4],[12],[17]
Investment, Identifier [Axis]: Iris Buyer, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[16] 0.04% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 2,376  
Ending balance $ 2,370 [1],[2],[7],[8],[16] $ 2,376 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Iris Buyer, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[13],[16] 0.06% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 3,667  
Ending balance $ 3,651 [1],[2],[7],[8],[13],[16] $ 3,667 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Iris Buyer, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[16] 0.02% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 1,022  
Ending balance 1,017 [1],[2],[7],[8],[16] $ 1,022 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Iris Buyer, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,650 1,827
Fair Value 0 0
Investment, Identifier [Axis]: Iris Buyer, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,850 3,673
Fair Value 0 $ 0
Investment, Identifier [Axis]: Italian Motorway Holdings S.à r.l | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[19]   1.48%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 92,617  
Ending balance [3],[4],[10],[11],[12],[19]   $ 92,617
Investment, Identifier [Axis]: Italian Motorway Holdings S.à r.l | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[18] 1.49%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[18] $ 91,092  
Investment, Identifier [Axis]: JS Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.58% [1],[2],[5],[8],[13] 0.56% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 35,203  
Ending balance 35,114 [1],[2],[5],[8],[13] $ 35,203 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: JS Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,452 3,452
Fair Value $ (17) $ (17)
Investment, Identifier [Axis]: JSS Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.80% [1],[2],[5],[8] 4.65% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 290,582  
Ending balance $ 292,533 [1],[2],[5],[8] $ 290,582 [3],[4],[9],[12]
Investment, Identifier [Axis]: JSS Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8] 0.08% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 5,018  
Ending balance $ 5,052 [1],[2],[5],[7],[8] $ 5,018 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: JSS Holdings, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[5],[8],[13] 0.51% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 31,921  
Ending balance 32,134 [1],[2],[5],[8],[13] $ 31,921 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: JSS Holdings, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,492 7,492
Fair Value $ (37) $ (37)
Investment, Identifier [Axis]: Jacuzzi Brands, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[5],[7],[8] 0.17% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 10,469  
Ending balance $ 10,752 [1],[2],[5],[7],[8] $ 10,469 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Jacuzzi Brands, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.21% [1],[2],[5],[8] 1.15% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 72,027  
Ending balance $ 73,974 [1],[2],[5],[8] $ 72,027 [3],[4],[9],[12]
Investment, Identifier [Axis]: Java Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[5],[8] 0.07% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 4,129  
Ending balance $ 9,951 [1],[2],[5],[8] $ 4,129 [3],[4],[9],[12]
Investment, Identifier [Axis]: Java Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.05% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 2,867  
Ending balance $ 846 [1],[2],[5],[7],[8],[13] $ 2,867 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Java Buyer, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[13] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,616  
Ending balance 215 [1],[2],[5],[7],[8],[13] $ 1,616 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Java Buyer, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 2,426  
Ending balance [3],[4],[9],[11],[12],[14]   $ 2,426
Investment, Identifier [Axis]: Java Buyer, Inc. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 1,493  
Ending balance [3],[4],[9],[11],[12],[14]   $ 1,493
Investment, Identifier [Axis]: Java Buyer, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,173
Fair Value   0
Investment, Identifier [Axis]: Java Buyer, Inc. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 3,492  
Fair Value 0  
Investment, Identifier [Axis]: Java Buyer, Inc. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 888  
Fair Value 0  
Investment, Identifier [Axis]: Java Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,713  
Fair Value 0  
Investment, Identifier [Axis]: Java Buyer, Inc. | Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments   367
Fair Value   0
Investment, Identifier [Axis]: Java Buyer, Inc. | Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments   735
Fair Value   $ 0
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   1.97%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] 123,186  
Ending balance [3],[4],[12],[17]   $ 123,186
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 4,885  
Ending balance [3],[4],[12],[17]   $ 4,885
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 2| Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 4,911  
Investment, Identifier [Axis]: Jayhawk Buyer, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 2.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 123,186  
Investment, Identifier [Axis]: Jayhawk Holdings, LP - Class A-1 Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 53  
Ending balance $ 53 [1],[2],[8] $ 53 [3],[4],[12]
Investment, Identifier [Axis]: Jayhawk Holdings, LP - Class A-2 Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 29  
Ending balance $ 28 [1],[2],[8] $ 29 [3],[4],[12]
Investment, Identifier [Axis]: Jeppesen Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.05% [1],[2],[7],[8],[13],[20] 1.02% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 63,901  
Ending balance 64,062 [1],[2],[7],[8],[13],[20] $ 63,901 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: Jeppesen Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,340 3,340
Fair Value $ (25) $ (25)
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class A Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[12]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class B Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 227  
Ending balance $ 231 [1],[2],[8] $ 227 [3],[4],[12]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class C Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 289  
Ending balance $ 289 [1],[2],[8] $ 289 [3],[4],[12]
Investment, Identifier [Axis]: KEN Bidco, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[6],[7],[8] 0.17% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 10,421  
Ending balance $ 10,117 [1],[2],[5],[6],[7],[8] $ 10,421 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: KKR Alberta Midstream Finance, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.38% [1],[2],[5],[6],[8] 0.38% [3],[4],[9],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12] $ 23,468  
Ending balance $ 23,468 [1],[2],[5],[6],[8] $ 23,468 [3],[4],[9],[10],[12]
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.29% [1],[2],[5],[8],[24] 0.28% [3],[4],[9],[12],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[26] $ 17,228  
Ending balance $ 17,430 [1],[2],[5],[8],[24] $ 17,228 [3],[4],[9],[12],[26]
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[24] 0.03% [3],[4],[9],[11],[12],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[26] $ 1,984  
Ending balance $ 2,007 [1],[2],[5],[7],[8],[24] $ 1,984 [3],[4],[9],[11],[12],[26]
Investment, Identifier [Axis]: Kattegat Project Bidco, AB 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[6],[7],[8],[18] 0.04% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 2,605  
Ending balance $ 2,605 [1],[2],[6],[7],[8],[18] $ 2,605 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Kattegat Project Bidco, AB 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.56% [1],[2],[6],[7],[8],[13],[18] 0.56% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 34,947  
Ending balance 34,372 [1],[2],[6],[7],[8],[13],[18] $ 34,947 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Kattegat Project Bidco, AB | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,030 7,030
Fair Value $ (94) (95)
Investment, Identifier [Axis]: King Bidco S.P.E.C. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[18] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[18] $ 198  
Investment, Identifier [Axis]: King Bidco S.P.E.C. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[18] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[18] $ 85  
Investment, Identifier [Axis]: King Bidco S.P.E.C. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   88
Fair Value   $ 0
Investment, Identifier [Axis]: King Bidco S.P.E.C. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[14],[19]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 201  
Ending balance [3],[4],[10],[11],[12],[14],[19]   $ 201
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 9,972  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 781  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 437 741
Fair Value 0 $ 0
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   0.16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] 9,709  
Ending balance [3],[4],[9],[12],[14]   $ 9,709
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. | Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 251 1,032
Fair Value 0 0
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. | Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 406 406
Fair Value (4) (4)
Investment, Identifier [Axis]: Koala Investment Holdings, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 266 266
Fair Value $ (1) $ (1)
Investment, Identifier [Axis]: Koala Investment Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,370  
Ending balance 1,351 [1],[2],[5],[7],[8],[13] $ 1,370 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Koala Investment Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 118 118
Fair Value $ (1) $ (1)
Investment, Identifier [Axis]: Kona Buyer, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[13] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 73  
Ending balance $ 74 [1],[2],[5],[7],[8],[13] $ 73 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Kona Buyer, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,029  
Ending balance $ 1,026 [1],[2],[5],[7],[8] $ 1,029 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Kona Buyer, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 258  
Investment, Identifier [Axis]: Kona Buyer, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 290  
Investment, Identifier [Axis]: Kona Buyer, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 440  
Fair Value (2)  
Investment, Identifier [Axis]: Kona Buyer, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   440
Fair Value   (1)
Investment, Identifier [Axis]: Kona Buyer, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   291
Fair Value   (1)
Investment, Identifier [Axis]: Kona Buyer, LLC | Delayed Draw Term Loan 3    
Schedule of Investments [Line Items]    
Unfunded commitments   260
Fair Value   (1)
Investment, Identifier [Axis]: Kona Buyer, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 167 167
Fair Value $ (1) (1)
Investment, Identifier [Axis]: Kwol Acquisition, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 10,272  
Investment, Identifier [Axis]: Kwol Acquisition, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 3,586  
Investment, Identifier [Axis]: Kwol Acquisition, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   84
Fair Value   $ 0
Investment, Identifier [Axis]: Kwol Acquisition, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   0.16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] 10,214  
Ending balance [3],[4],[9],[12],[14]   $ 10,214
Investment, Identifier [Axis]: Kwol Acquisition, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,659 1,345
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[5],[8] 0.23% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 14,306  
Ending balance $ 14,119 [1],[2],[5],[8] $ 14,306 [3],[4],[9],[12]
Investment, Identifier [Axis]: LD Lower Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.19% [1],[2],[8],[16] 1.19% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 74,609  
Ending balance $ 72,736 [1],[2],[8],[16] $ 74,609 [3],[4],[12]
Investment, Identifier [Axis]: LPW Group Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[8],[13],[16] 0.42% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 26,141  
Ending balance 26,393 [1],[2],[8],[13],[16] $ 26,141 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: LPW Group Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,373 5,373
Fair Value 0 (54)
Investment, Identifier [Axis]: LogicMonitor, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,722 2,722
Fair Value $ (17) $ (17)
Investment, Identifier [Axis]: LogicMonitor, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[2],[5],[8],[13] 0.34% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 21,232  
Ending balance 21,125 [1],[2],[5],[8],[13] $ 21,232 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: LogicMonitor, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,992 1,992
Fair Value (25) (25)
Investment, Identifier [Axis]: Lsf12 Crown US Commercial Bidco, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,345 4,345
Fair Value $ (26) $ (6)
Investment, Identifier [Axis]: Lytx, Inc. | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.38% [1],[2],[8],[16] 1.35% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 84,454  
Ending balance $ 84,454 [1],[2],[8],[16] $ 84,454 [3],[4],[12],[17]
Investment, Identifier [Axis]: MAG DS Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.28% [1],[2],[16] 1.26% [3],[4],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[17] $ 78,610  
Ending balance $ 78,342 [1],[2],[16] $ 78,610 [3],[4],[17]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.37% [1],[2],[5],[8] 0.37% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 22,928  
Ending balance $ 22,870 [1],[2],[5],[8] $ 22,928 [3],[4],[9],[12]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8],[13] 0.07% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,519  
Ending balance $ 4,877 [1],[2],[5],[7],[8],[13] $ 4,519 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[5],[7],[8] 0.05% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 3,391  
Ending balance 3,383 [1],[2],[5],[7],[8] $ 3,391 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,962
Fair Value   0
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,327 1,133
Fair Value 0 0
Investment, Identifier [Axis]: MEDX AMCP Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,692 1,701
Fair Value $ (8) $ (9)
Investment, Identifier [Axis]: MEDX AMCP Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8],[13] 0.06% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,034  
Ending balance 4,034 [1],[2],[5],[7],[8],[13] $ 4,034 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: MEDX AMCP Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 724 724
Fair Value $ (7) $ (7)
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[13],[16] 0.03% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 1,927  
Ending balance $ 1,935 [1],[2],[7],[8],[13],[16] $ 1,927 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[16] 0.00% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 75  
Ending balance $ 75 [1],[2],[7],[8],[16] $ 75 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[16] 0.00% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 75  
Ending balance 75 [1],[2],[7],[8],[16] $ 75 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 161 161
Fair Value 0 0
Investment, Identifier [Axis]: ML Holdco, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 300 300
Fair Value $ (1) $ 0
Investment, Identifier [Axis]: ML Holdco, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[13],[20] 0.02% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 1,147  
Ending balance $ 1,150 [1],[2],[7],[8],[13],[20] $ 1,147 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: MPG Parent Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[8],[16] 0.17% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 10,762  
Ending balance $ 10,735 [1],[2],[8],[16] $ 10,762 [3],[4],[12],[17]
Investment, Identifier [Axis]: MPG Parent Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[7],[8],[13],[16] 0.05% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 3,289  
Ending balance 3,281 [1],[2],[7],[8],[13],[16] $ 3,289 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: MPG Parent Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,439 2,439
Fair Value 0 0
Investment, Identifier [Axis]: MPG Parent Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,339 1,339
Fair Value 0 0
Investment, Identifier [Axis]: MRH Trowe Beteiligungsgesellschaft mbH | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 58 70
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MRH Trowe Beteiligungsgesellschaft mbH | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[8],[13],[18] 0.01% [3],[4],[10],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[19] $ 474  
Ending balance 469 [1],[2],[6],[8],[13],[18] $ 474 [3],[4],[10],[12],[14],[19]
Investment, Identifier [Axis]: MRH Trowe Beteiligungsgesellschaft mbH | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 35 35
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MRI Software, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[16] 0.11% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 6,655  
Ending balance $ 6,612 [1],[2],[16] $ 6,655 [3],[4],[12],[17]
Investment, Identifier [Axis]: MRI Software, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.48% [1],[2],[16] 1.44% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 89,728  
Ending balance $ 89,153 [1],[2],[16] $ 89,728 [3],[4],[12],[17]
Investment, Identifier [Axis]: MRI Software, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[13],[16] 0.02% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 1,387  
Ending balance $ 1,749 [1],[2],[7],[8],[13],[16] $ 1,387 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: MRI Software, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[13],[16] 0.01% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 614  
Ending balance 1,938 [1],[2],[7],[8],[13],[16] $ 614 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: MRI Software, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,137 4,501
Fair Value 0 0
Investment, Identifier [Axis]: MRI Software, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,033 6,435
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Magic Bidco, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[5],[8] 0.41% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 25,551  
Ending balance $ 24,077 [1],[2],[5],[8] $ 25,551 [3],[4],[9],[12]
Investment, Identifier [Axis]: Magic Bidco, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8],[13] 0.05% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 3,324  
Ending balance $ 3,119 [1],[2],[5],[7],[8],[13] $ 3,324 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Magic Bidco, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,251  
Ending balance 800 [1],[2],[5],[7],[8],[13] $ 1,251 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Magic Bidco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,568 6,568
Fair Value 0 0
Investment, Identifier [Axis]: Magic Bidco, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 371 371
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[8] 0.09% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 5,571  
Ending balance $ 5,556 [1],[2],[5],[8] $ 5,571 [3],[4],[9],[12]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8] 0.00% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 139  
Ending balance $ 138 [1],[2],[5],[7],[8] $ 139 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8] 0.07% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 4,501  
Ending balance $ 4,409 [1],[2],[5],[7],[8] $ 4,501 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.54% [1],[2],[13] 0.53% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 33,308  
Ending balance 33,226 [1],[2],[13] $ 33,308 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,508 5,508
Fair Value $ (41) $ (41)
Investment, Identifier [Axis]: Mandolin Technology Holdings, Inc. - Series A Preferred Shares | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[8] 0.08% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 4,122  
Ending balance $ 4,027 [1],[2],[8] $ 4,122 [3],[4],[12]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[7],[8],[20] 0.12% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 7,308  
Ending balance $ 7,268 [1],[2],[7],[8],[20] $ 7,308 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[7],[8],[20] 0.10% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 6,416  
Ending balance $ 6,331 [1],[2],[7],[8],[20] $ 6,416 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[13],[18] 0.01% [3],[4],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[19] $ 351  
Ending balance $ 279 [1],[2],[7],[8],[13],[18] $ 351 [3],[4],[11],[12],[14],[19]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[7],[8],[20] 0.05% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 3,169  
Ending balance 3,185 [1],[2],[7],[8],[20] $ 3,169 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 873 807
Fair Value 0 0
Investment, Identifier [Axis]: MannKind Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,435 5,435
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MannKind Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.25% [1],[2],[6],[8],[13],[27] 2.20% [3],[4],[10],[12],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[28] $ 137,455  
Ending balance $ 137,455 [1],[2],[6],[8],[13],[27] $ 137,455 [3],[4],[10],[12],[14],[28]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8] 0.07% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 4,498  
Ending balance $ 4,535 [1],[2],[5],[7],[8] $ 4,498 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,446  
Ending balance $ 1,458 [1],[2],[5],[7],[8] $ 1,446 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,448  
Ending balance $ 1,460 [1],[2],[5],[7],[8] $ 1,448 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Material Holdings, LLC 1 | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[7],[8],[23] 0.35% [3],[4],[9],[11],[12],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[22] $ 22,074  
Ending balance $ 20,433 [1],[2],[5],[7],[8],[23] $ 22,074 [3],[4],[9],[11],[12],[22]
Investment, Identifier [Axis]: Material Holdings, LLC 2 | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[15],[23] 0.00% [3],[4],[9],[11],[12],[22],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[22],[25] $ 0  
Ending balance $ 0 [1],[2],[5],[7],[8],[15],[23] $ 0 [3],[4],[9],[11],[12],[22],[25]
Investment, Identifier [Axis]: Material Holdings, LLC 3 | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13],[23] 0.01% [3],[4],[9],[11],[12],[14],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14],[22] $ 725  
Ending balance 1,223 [1],[2],[5],[7],[8],[13],[23] $ 725 [3],[4],[9],[11],[12],[14],[22]
Investment, Identifier [Axis]: Material Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,685 2,182
Fair Value 0 0
Investment, Identifier [Axis]: Material Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 353 353
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Material+ Holding Company, LLC - Class A Preferred Units | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[23] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[23] $ 0  
Investment, Identifier [Axis]: Material+ Holding Company, LLC - Class A Units | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[23] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[23] $ 0  
Investment, Identifier [Axis]: Material+ Holding Company, LLC - Class B Preferred Units | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[23] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[23] $ 0  
Investment, Identifier [Axis]: Material+ Holding Company, LLC - Class C Units | Non-Controlled Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[22]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[22] $ 0  
Ending balance [3],[4],[12],[22]   $ 0
Investment, Identifier [Axis]: Material+ Holding Company, LLC - Class C Units | Non-Controlled Affiliated    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[23] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[23] $ 0  
Investment, Identifier [Axis]: Medallia, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.88% [1],[2],[5],[8],[15] 4.90% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 306,100  
Ending balance $ 236,721 [1],[2],[5],[8],[15] $ 306,100 [3],[4],[9],[12]
Investment, Identifier [Axis]: Medallia, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [2],[5],[7],[8],[15] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,796  
Ending balance $ 1,389 [2],[5],[7],[8],[15] $ 1,796 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Mercury Bidco Globe, Limited 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.18% [1],[2],[6],[7],[8],[18] 1.18% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 73,600  
Ending balance $ 72,270 [1],[2],[6],[7],[8],[18] $ 73,600 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Mercury Bidco Globe, Limited 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[20] 0.07% [3],[4],[10],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[21] $ 4,520  
Ending balance $ 4,520 [1],[2],[6],[7],[8],[20] $ 4,520 [3],[4],[10],[11],[12],[21]
Investment, Identifier [Axis]: Mercury Bidco Globe, Limited | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,881
Fair Value   $ 0
Investment, Identifier [Axis]: Metrodora S.L. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 106  
Ending balance $ 104 [1],[2],[6],[7],[8],[18] $ 106 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Metrodora S.L. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 43  
Ending balance $ 43 [1],[2],[6],[7],[8],[18] $ 43 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Micross Topco, Inc. - Common Equity | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[8] 0.12% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 7,198  
Ending balance $ 7,877 [1],[2],[8] $ 7,198 [3],[4],[12]
Investment, Identifier [Axis]: Mimecast Limited - LP Interest | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 735  
Ending balance $ 735 [1],[2],[8] $ 735 [3],[4],[12]
Investment, Identifier [Axis]: Minerva Bidco, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[6],[7],[8],[18] 0.10% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 6,438  
Ending balance 6,322 [1],[2],[6],[7],[8],[18] $ 6,438 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Mode Holdings, LP - Class A-2 Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 1,646  
Ending balance [3],[4],[12]   $ 1,646
Investment, Identifier [Axis]: Mode Holdings, LP - Class A-2 Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 604  
Investment, Identifier [Axis]: Mode Purchaser, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.03% [1],[2],[8],[16] 2.01% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 125,734  
Ending balance $ 123,662 [1],[2],[8],[16] $ 125,734 [3],[4],[12],[17]
Investment, Identifier [Axis]: Mode Purchaser, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[16] 0.06% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 3,589  
Ending balance $ 3,530 [1],[2],[7],[8],[16] $ 3,589 [3],[4],[12],[17]
Investment, Identifier [Axis]: Modernizing Medicine, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[5],[8],[13] 0.14% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 8,963  
Ending balance 9,013 [1],[2],[5],[8],[13] $ 8,963 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Modernizing Medicine, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 827 827
Fair Value $ (8) $ (8)
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 221  
Ending balance $ 215 [1],[2],[6],[7],[8],[18] $ 221 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[8],[18] 0.02% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 1,091  
Ending balance $ 1,073 [1],[2],[6],[7],[8],[18] $ 1,091 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[18] 0.01% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 739  
Ending balance $ 727 [1],[2],[6],[7],[8],[18] $ 739 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[20] 0.01% [3],[4],[10],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[21] $ 498  
Ending balance 518 [1],[2],[6],[7],[8],[20] $ 498 [3],[4],[10],[11],[12],[21]
Investment, Identifier [Axis]: More Cowbell II, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 871 871
Fair Value $ (11) $ (11)
Investment, Identifier [Axis]: More Cowbell II, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[8],[13] 0.13% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 7,866  
Ending balance 7,846 [1],[2],[5],[8],[13] $ 7,866 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: More Cowbell II, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,177 1,177
Fair Value 0 0
Investment, Identifier [Axis]: NAVEX TopCo, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,494 10,494
Fair Value $ (26) $ 0
Investment, Identifier [Axis]: NAVEX TopCo, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.37% [1],[2],[5],[8],[13] 1.32% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 82,387  
Ending balance 82,445 [1],[2],[5],[8],[13] $ 82,387 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: NAVEX TopCo, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,910 5,910
Fair Value $ (124) $ (184)
Investment, Identifier [Axis]: NC Ocala Co-Invest Beta, LP - LP Interest | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[8] 0.06% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 3,168  
Ending balance $ 1,399 [1],[2],[8] $ 3,168 [3],[4],[12]
Investment, Identifier [Axis]: NDC Acquisition Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[8],[13],[16] 0.22% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 13,489  
Ending balance 14,482 [1],[2],[8],[13],[16] $ 13,489 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: NDC Acquisition Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,055 3,083
Fair Value 0 0
Investment, Identifier [Axis]: NDT Global Holding, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 194 194
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: NDT Global Holding, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[8],[13],[20] 0.01% [3],[4],[10],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[21] $ 929  
Ending balance 937 [1],[2],[6],[7],[8],[13],[20] $ 929 [3],[4],[10],[11],[12],[14],[21]
Investment, Identifier [Axis]: NDT Global Holding, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 165 173
Fair Value $ 0 $ (2)
Investment, Identifier [Axis]: NSI Parent, LP - Class A Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 526  
Ending balance 550 [1],[2],[8] $ 526 [3],[4],[12]
Investment, Identifier [Axis]: Navigator Acquiror, Inc. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 7,762 7,762
Fair Value 0 0
Investment, Identifier [Axis]: Navigator Acquiror, Inc. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 7,762 7,762
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Navigator Acquiror, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.49% [1],[2],[8],[13],[20] 3.61% [3],[4],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[21] $ 225,532  
Ending balance $ 213,181 [1],[2],[8],[13],[20] $ 225,532 [3],[4],[12],[14],[21]
Investment, Identifier [Axis]: Ncp Helix Holdings, LLC - Preferred Shares | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 500  
Ending balance 500 [1],[2],[8] $ 500 [3],[4],[12]
Investment, Identifier [Axis]: Nephele III, BV | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 28 25
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Nephele III, BV | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[13],[18] 0.00% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 309  
Ending balance $ 304 [1],[2],[6],[7],[8],[13],[18] $ 309 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Neptune BidCo, SAS | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   205
Fair Value   $ 0
Investment, Identifier [Axis]: Neptune BidCo, SAS | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[6],[7],[8],[18] 0.15% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 9,661  
Ending balance $ 9,704 [1],[2],[6],[7],[8],[18] $ 9,661 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Neptune Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[8],[13] 0.11% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 6,837  
Ending balance 6,819 [1],[2],[5],[8],[13] $ 6,837 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Neptune Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 933 933
Fair Value (23) (23)
Investment, Identifier [Axis]: Netsmart Technologies, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,130 3,130
Fair Value $ (16) $ (16)
Investment, Identifier [Axis]: Netsmart Technologies, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.40% [1],[2],[5],[8],[13] 0.39% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 24,215  
Ending balance 24,134 [1],[2],[5],[8],[13] $ 24,215 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Netsmart Technologies, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,432 4,432
Fair Value $ (44) $ 0
Investment, Identifier [Axis]: Nintex Topco, Limited | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.49% [1],[2],[5],[6],[8] 0.49% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 30,439  
Ending balance $ 30,022 [1],[2],[5],[6],[8] $ 30,439 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: Noble Aggregator GP, LLC - GP Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[12]
Investment, Identifier [Axis]: Noble Aggregator, LP - Common Equity Class A Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 329  
Ending balance 313 [1],[2],[8] $ 329 [3],[4],[12]
Investment, Identifier [Axis]: Noble Midco 3, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,875 3,875
Fair Value $ (19) $ (19)
Investment, Identifier [Axis]: Noble Midco 3, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[5],[6],[7],[8],[13] 0.27% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 16,966  
Ending balance 17,354 [1],[2],[5],[6],[7],[8],[13] $ 16,966 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Noble Midco 3, Ltd. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,002 2,390
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[13],[16] 0.04% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 2,546  
Ending balance $ 2,491 [1],[2],[7],[8],[13],[16] $ 2,546 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[16] 0.03% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 2,105  
Ending balance $ 2,100 [1],[2],[7],[8],[16] $ 2,105 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[16] 0.02% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 1,233  
Ending balance $ 1,229 [1],[2],[7],[8],[16] $ 1,233 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[16] 0.01% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 525  
Ending balance $ 523 [1],[2],[7],[8],[16] $ 525 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[13],[16] 0.01% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 599  
Ending balance $ 919 [1],[2],[7],[8],[13],[16] $ 599 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[16] 0.01% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 610  
Ending balance $ 608 [1],[2],[7],[8],[16] $ 610 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 7 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[16] 0.06% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 3,756  
Ending balance 3,746 [1],[2],[7],[8],[16] $ 3,756 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,222 4,544
Fair Value 0 0
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 273 359
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: OHCP V TC COI, LP - LP Interest | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[8] 0.15% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 8,647  
Ending balance 10,570 [1],[2],[8] $ 8,647 [3],[4],[12]
Investment, Identifier [Axis]: Octane Purchaser, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,227 1,227
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Octane Purchaser, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[13],[20] 0.04% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 2,329  
Ending balance 2,318 [1],[2],[7],[8],[13],[20] $ 2,329 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: Octane Purchaser, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 491 491
Fair Value $ (2) $ (2)
Investment, Identifier [Axis]: Odevo, AB 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 295  
Ending balance $ 290 [1],[2],[6],[7],[8],[18] $ 295 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Odevo, AB 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[18] 0.05% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 2,986  
Ending balance $ 2,932 [1],[2],[6],[7],[8],[18] $ 2,986 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Odevo, AB 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[6],[7],[8],[18] 0.16% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 9,880  
Ending balance $ 9,608 [1],[2],[6],[7],[8],[18] $ 9,880 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Odevo, AB 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.46% [1],[2],[6],[8],[18] 0.45% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 28,239  
Ending balance $ 28,239 [1],[2],[6],[8],[18] $ 28,239 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: Odevo, AB 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[18] 0.23% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 14,307  
Ending balance 4,964 [1],[2],[6],[7],[8],[18] $ 14,307 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Odevo, AB 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[19]   0.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 10,329  
Ending balance [3],[4],[10],[11],[12],[19]   $ 10,329
Investment, Identifier [Axis]: Odevo, AB 7 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[6],[7],[8],[13],[18] 0.08% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 5,027  
Ending balance $ 20,205 [1],[2],[6],[7],[8],[13],[18] $ 5,027 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Odevo, AB 8 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[18] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[18] $ 10,329  
Investment, Identifier [Axis]: Odevo, AB 9 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[18] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[18] $ 4,936  
Investment, Identifier [Axis]: Odevo, AB | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 36,872  
Fair Value $ (181)  
Investment, Identifier [Axis]: Odevo, AB | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   5,494
Fair Value   0
Investment, Identifier [Axis]: Odevo, AB | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   41,966
Fair Value   $ (209)
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[5],[8],[24] 0.17% [3],[4],[9],[12],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[26] $ 10,804  
Ending balance $ 10,804 [1],[2],[5],[8],[24] $ 10,804 [3],[4],[9],[12],[26]
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[5],[8],[24] 0.23% [3],[4],[12],[14],[17],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17],[26] $ 14,591  
Ending balance 16,857 [1],[2],[5],[8],[24] $ 14,591 [3],[4],[12],[14],[17],[26]
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,275
Fair Value   $ 0
Investment, Identifier [Axis]: Onward Acquireco, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,275  
Fair Value $ (24)  
Investment, Identifier [Axis]: Onward Acquireco, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 14,488  
Investment, Identifier [Axis]: Onward Acquireco, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,614  
Fair Value $ 0  
Investment, Identifier [Axis]: Optimizely North America, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,122  
Ending balance $ 1,099 [1],[2],[5],[7],[8] $ 1,122 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Optimizely North America, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8] 0.05% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 3,261  
Ending balance $ 3,199 [1],[2],[5],[7],[8] $ 3,261 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Optimizely North America, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[7],[8],[13] 0.13% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 7,896  
Ending balance 7,876 [1],[2],[5],[7],[8],[13] $ 7,896 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Optimizely North America, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,218 1,218
Fair Value $ (12) $ (12)
Investment, Identifier [Axis]: Other Cash and Cash Equivalents    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.01% [1],[2] 4.20% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 262,463  
Ending balance $ 305,794 [1],[2] $ 262,463 [3],[4]
Investment, Identifier [Axis]: Oxford Global Resources, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[2],[8],[16] 0.30% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 18,580  
Ending balance $ 18,531 [1],[2],[8],[16] $ 18,580 [3],[4],[12],[17]
Investment, Identifier [Axis]: Oxford Global Resources, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[8],[13],[16] 0.05% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 2,880  
Ending balance $ 2,872 [1],[2],[8],[13],[16] $ 2,880 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: Oxford Global Resources, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[8],[16] 0.04% [3],[4],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[21] $ 2,194  
Ending balance 2,189 [1],[2],[8],[16] $ 2,194 [3],[4],[12],[21]
Investment, Identifier [Axis]: Oxford Global Resources, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,085 3,085
Fair Value 0 0
Investment, Identifier [Axis]: PAS Parent, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 705 705
Fair Value $ (4) $ (4)
Investment, Identifier [Axis]: PAS Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 454  
Ending balance 457 [1],[2],[5],[7],[8],[13] $ 454 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: PAS Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 328 328
Fair Value $ (3) $ (3)
Investment, Identifier [Axis]: PDI TA Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.76% [1],[2],[5],[8] 0.76% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 47,301  
Ending balance $ 46,591 [1],[2],[5],[8] $ 47,301 [3],[4],[9],[12]
Investment, Identifier [Axis]: PDI TA Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[5],[7],[8],[13] 0.04% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 2,787  
Ending balance 3,499 [1],[2],[5],[7],[8],[13] $ 2,787 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: PDI TA Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 253 1,013
Fair Value 0 0
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 369 389
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,155  
Ending balance 1,172 [1],[2],[5],[7],[8],[13] $ 1,155 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 141 141
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[8] 0.03% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 1,957  
Ending balance $ 1,953 [1],[2],[5],[8] $ 1,957 [3],[4],[9],[12]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[13] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 215  
Ending balance 254 [1],[2],[5],[7],[8],[13] $ 215 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 187 187
Fair Value 0 0
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 99 139
Fair Value 0 0
Investment, Identifier [Axis]: PT Intermediate Holdings III, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,688 3,688
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: PT Intermediate Holdings III, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.04% [1],[2],[5],[8],[13] 1.01% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 63,193  
Ending balance $ 63,462 [1],[2],[5],[8],[13] $ 63,193 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Paisley Bidco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[6],[7],[8],[18] 0.13% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 8,408  
Ending balance $ 8,040 [1],[2],[6],[7],[8],[18] $ 8,408 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Paisley Bidco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[6],[7],[8],[18] 0.06% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 3,888  
Ending balance $ 3,725 [1],[2],[6],[7],[8],[18] $ 3,888 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Paisley Bidco, Ltd. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[18] 0.05% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 3,430  
Ending balance $ 3,285 [1],[2],[6],[7],[8],[18] $ 3,430 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Paisley Bidco, Ltd. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[18] 0.05% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 3,326  
Ending balance 3,186 [1],[2],[6],[7],[8],[18] $ 3,326 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Paisley Bidco, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 906 906
Fair Value (3) $ (3)
Investment, Identifier [Axis]: Paramount Global Surfaces, Inc. | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.66%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 41,393  
Ending balance [3],[4],[12],[17]   $ 41,393
Investment, Identifier [Axis]: Paramount Global Surfaces, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15],[16] 0.59%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15],[16] $ 36,174  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8] 0.07% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 4,498  
Ending balance $ 4,486 [1],[2],[5],[7],[8] $ 4,498 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8],[13] 0.07% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,214  
Ending balance 4,205 [1],[2],[5],[7],[8],[13] $ 4,214 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 469 469
Fair Value $ (9) $ (9)
Investment, Identifier [Axis]: Pave America Holding, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[2],[5],[8],[13] 0.23% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 14,277  
Ending balance $ 15,882 [1],[2],[5],[8],[13] $ 14,277 [3],[4],[9],[12]
Investment, Identifier [Axis]: Pave America Holding, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.04% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 2,529  
Ending balance 1,313 [1],[2],[5],[7],[8],[13] $ 2,529 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Pave America Holding, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,493 3,493
Fair Value 0 0
Investment, Identifier [Axis]: Pave America Holding, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,403 2,601
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Pavion Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.23% [1],[2],[5],[8] 1.20% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 75,024  
Ending balance $ 75,024 [1],[2],[5],[8] $ 75,024 [3],[4],[9],[12]
Investment, Identifier [Axis]: Pavion Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[2],[5],[8] 0.25% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 15,819  
Ending balance $ 15,819 [1],[2],[5],[8] $ 15,819 [3],[4],[9],[12]
Investment, Identifier [Axis]: Perseus Bidco US, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[6],[7],[8],[18] 0.16% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 10,276  
Ending balance $ 10,276 [1],[2],[6],[7],[8],[18] $ 10,276 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Petrus Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[8] 0.04% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 2,442  
Ending balance $ 2,436 [1],[2],[5],[8] $ 2,442 [3],[4],[9],[12]
Investment, Identifier [Axis]: Petrus Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 642  
Ending balance $ 640 [1],[2],[5],[7],[8] $ 642 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Petrus Buyer, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 78  
Investment, Identifier [Axis]: Petrus Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 194 272
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Phoenix 1 Buyer Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.42% [1],[2],[5],[8],[13] 0.41% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 25,429  
Ending balance 25,365 [1],[2],[5],[8],[13] $ 25,429 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Phoenix 1 Buyer Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,009 5,009
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class A Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[8] 0.13% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 7,553  
Ending balance $ 7,658 [1],[2],[8] $ 7,553 [3],[4],[12]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional A Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[8] 0.03% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 1,623  
Ending balance $ 1,646 [1],[2],[8] $ 1,623 [3],[4],[12]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional B Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 257  
Ending balance $ 233 [1],[2],[8] $ 257 [3],[4],[12]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class B Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[8] 0.02% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 1,196  
Ending balance $ 1,082 [1],[2],[8] $ 1,196 [3],[4],[12]
Investment, Identifier [Axis]: Profile Products, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[5],[8] 0.11% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 7,072  
Ending balance $ 7,071 [1],[2],[5],[8] $ 7,072 [3],[4],[9],[12]
Investment, Identifier [Axis]: Profile Products, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 336  
Ending balance $ 326 [1],[2],[5],[7],[8],[13] $ 336 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Profile Products, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 163  
Investment, Identifier [Axis]: Profile Products, LLC | Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 207 373
Fair Value 0 (4)
Investment, Identifier [Axis]: Profile Products, LLC | Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 190 176
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.20% [1],[2],[8],[18] 1.17% [3],[4],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[19] $ 72,923  
Ending balance 72,923 [1],[2],[8],[18] $ 72,923 [3],[4],[12],[19]
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[19]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[19] $ 8,280  
Ending balance [3],[4],[19]   $ 8,280
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 998  
Ending balance $ 990 [1],[2],[5],[7],[8] $ 998 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[18] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[18] $ 8,200  
Investment, Identifier [Axis]: QBS Parent, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,472 3,472
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: QBS Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[2],[5],[7],[8],[13] 0.22% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 13,619  
Ending balance 13,412 [1],[2],[5],[7],[8],[13] $ 13,619 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: QBS Parent, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,908 1,734
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Qualus Power Services Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[8],[16] 0.52% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 32,436  
Ending balance $ 32,351 [1],[2],[8],[16] $ 32,436 [3],[4],[12],[17]
Investment, Identifier [Axis]: Qualus Power Services Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.57% [1],[2],[8],[16] 0.56% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 35,077  
Ending balance $ 34,987 [1],[2],[8],[16] $ 35,077 [3],[4],[12],[17]
Investment, Identifier [Axis]: Qualus Power Services Corp. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.35% [1],[2],[8],[16] 1.32% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 82,455  
Ending balance $ 82,235 [1],[2],[8],[16] $ 82,455 [3],[4],[12],[17]
Investment, Identifier [Axis]: Qualus Power Services Corp. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.55% [1],[2],[7],[8],[16] 0.54% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 33,718  
Ending balance $ 33,634 [1],[2],[7],[8],[16] $ 33,718 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: R1 Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[13],[16] 0.02% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 1,260  
Ending balance 1,250 [1],[2],[7],[8],[13],[16] $ 1,260 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: R1 Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 31 31
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: RC VI Buckeye Holdings, LLC - LLC Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 187  
Ending balance $ 187 [1],[2],[8] $ 187 [3],[4],[12]
Investment, Identifier [Axis]: RWL Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.46%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 28,150  
Investment, Identifier [Axis]: RWL Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 1,294  
Investment, Identifier [Axis]: RWL Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   0.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 27,628  
Ending balance [3],[4],[9],[12]   $ 27,628
Investment, Identifier [Axis]: RailPros Parent, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 400  
Investment, Identifier [Axis]: RailPros Parent, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 37  
Investment, Identifier [Axis]: RailPros Parent, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 87 124
Fair Value 0 $ (1)
Investment, Identifier [Axis]: RailPros Parent, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 398  
Ending balance [3],[4],[9],[11],[12],[14]   $ 398
Investment, Identifier [Axis]: RailPros Parent, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 62 62
Fair Value $ (1) $ (1)
Investment, Identifier [Axis]: Rally Buyer, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 815  
Ending balance $ 790 [1],[2],[5],[7],[8] $ 815 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: Rally Buyer, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[13] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 54  
Ending balance 43 [1],[2],[5],[7],[8],[13] $ 54 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Rally Buyer, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 52 46
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Razor Holdco, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[5],[8] 0.30% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 18,885  
Ending balance 18,696 [1],[2],[5],[8] $ 18,885 [3],[4],[9],[12]
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp. 1 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   1.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 73,267  
Ending balance [3],[4],[12],[17]   $ 73,267
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 1.20%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 73,081  
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp. 2 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[17]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 11,583  
Ending balance [3],[4],[11],[12],[14],[17]   $ 11,583
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.27%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 16,674  
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,113 16,235
Fair Value 0 $ 0
Investment, Identifier [Axis]: Red Griffin ParentCo, LLC - Class A Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 1,071  
Ending balance [3],[4],[12]   $ 1,071
Investment, Identifier [Axis]: Red Griffin ParentCo, LLC - Class A Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 903  
Investment, Identifier [Axis]: Red Pathway Bidco, AB 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[6],[7],[8],[18] 0.09% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 5,844  
Ending balance $ 5,734 [1],[2],[6],[7],[8],[18] $ 5,844 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Red Pathway Bidco, AB 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[18] 0.04% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 2,649  
Ending balance $ 2,758 [1],[2],[6],[7],[8],[18] $ 2,649 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Red Pathway Bidco, AB 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[6],[7],[8],[18] 0.03% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 1,882  
Ending balance $ 1,850 [1],[2],[6],[7],[8],[18] $ 1,882 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Red Pathway Bidco, AB 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[18] 0.07% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 4,234  
Ending balance $ 4,164 [1],[2],[6],[7],[8],[18] $ 4,234 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Red Pathway Bidco, AB 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[13],[18] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[13],[18] $ 2,749  
Investment, Identifier [Axis]: Red Pathway Bidco, AB | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,962 6,793
Fair Value $ 0 $ (52)
Investment, Identifier [Axis]: Red River Technology, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.16% [1],[2],[8],[16] 1.18% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 73,436  
Ending balance $ 70,509 [1],[2],[8],[16] $ 73,436 [3],[4],[12],[17]
Investment, Identifier [Axis]: Red River Technology, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[7],[8],[16] 0.13% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 8,228  
Ending balance $ 7,901 [1],[2],[7],[8],[16] $ 8,228 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: Redwood Services Group, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.25% [1],[2],[5],[8] 1.22% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 76,375  
Ending balance $ 76,223 [1],[2],[5],[8] $ 76,375 [3],[4],[9],[12]
Investment, Identifier [Axis]: Redwood Services Group, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.61% [1],[2],[5],[8],[13] 1.58% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 98,566  
Ending balance 98,285 [1],[2],[5],[8],[13] $ 98,566 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Redwood Services Group, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,608
Fair Value   $ 0
Investment, Identifier [Axis]: Redwood Services Group, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 4,608  
Fair Value 0  
Investment, Identifier [Axis]: Redwood Services Group, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 25,000  
Fair Value 0  
Investment, Identifier [Axis]: Relativity ODA, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[14],[17]   0.31%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] 19,257  
Ending balance [3],[4],[12],[14],[17]   $ 19,257
Investment, Identifier [Axis]: Relativity ODA, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,966
Fair Value   $ (74)
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 1 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 31,588  
Ending balance [3],[4],[12],[17]   $ 31,588
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.54%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 32,678  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 2 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.31%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 19,465  
Ending balance [3],[4],[12],[17]   $ 19,465
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.33%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 20,124  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 3 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 3,969  
Ending balance [3],[4],[12],[17]   $ 3,969
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 4,113  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 4 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[17]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 1,179  
Ending balance [3],[4],[11],[12],[17]   $ 1,179
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[16] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[16] $ 1,222  
Investment, Identifier [Axis]: Rocky MRA Acquisition Corp. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[8],[20] 0.15% [3],[4],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[21] $ 9,379  
Ending balance 9,355 [1],[2],[8],[20] $ 9,379 [3],[4],[12],[21]
Investment, Identifier [Axis]: SAFEbuilt, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,378  
Fair Value $ (17)  
Investment, Identifier [Axis]: SAFEbuilt, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.33%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 20,122  
Investment, Identifier [Axis]: SAFEbuilt, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,267  
Fair Value $ (13)  
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[16] 0.03% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 2,097  
Ending balance $ 2,154 [1],[2],[7],[8],[16] $ 2,097 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[16] 0.01% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 697  
Ending balance $ 721 [1],[2],[7],[8],[16] $ 697 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[13],[16] 0.00% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 162  
Ending balance 167 [1],[2],[7],[8],[13],[16] $ 162 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 91 91
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SG Acquisition, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.03% [1],[2],[5],[8],[13] 2.02% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 126,384  
Ending balance 123,617 [1],[2],[5],[8],[13] $ 126,384 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: SG Acquisition, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 8,301 8,301
Fair Value 0 0
Investment, Identifier [Axis]: SI Swan UK Bidco, Ltd. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 7,142 7,142
Fair Value 0 0
Investment, Identifier [Axis]: SI Swan UK Bidco, Ltd. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 8,241 8,241
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SI Swan UK Bidco, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.77% [1],[2],[6],[7],[8],[13],[18] 0.76% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 47,262  
Ending balance $ 47,262 [1],[2],[6],[7],[8],[13],[18] $ 47,262 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: SIQ Holdings III Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[5],[8] 0.24% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 14,850  
Ending balance $ 14,813 [1],[2],[5],[8] $ 14,850 [3],[4],[9],[12]
Investment, Identifier [Axis]: SIQ Holdings III Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[13] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 160  
Ending balance $ 193 [1],[2],[5],[7],[8],[13] $ 160 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: SIQ Holdings III Corp. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 2,926  
Investment, Identifier [Axis]: SIQ Holdings III Corp. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,667 6,667
Fair Value 0 0
Investment, Identifier [Axis]: SIQ Holdings III Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,107 3,107
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SQ ABS Issuer, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[18] 0.08% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 4,752  
Ending balance 4,419 [1],[2],[6],[7],[8],[18] $ 4,752 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: SQ ABS Issuer, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[19]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 3,152  
Ending balance [3],[4],[10],[11],[12],[19]   $ 3,152
Investment, Identifier [Axis]: SQ ABS Issuer, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[18] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[18] $ 2,924  
Investment, Identifier [Axis]: STV Group, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   6,976
Fair Value   $ (70)
Investment, Identifier [Axis]: STV Group, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[5],[8],[13] 0.38% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 23,920  
Ending balance 23,929 [1],[2],[5],[8],[13] $ 23,920 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: STV Group, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,883 4,883
Fair Value 0 $ 0
Investment, Identifier [Axis]: Saber Power Services, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12]   0.74%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] 46,154  
Ending balance [3],[4],[9],[11],[12]   $ 46,154
Investment, Identifier [Axis]: Saber Power Services, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 769  
Ending balance [3],[4],[9],[11],[12],[14]   $ 769
Investment, Identifier [Axis]: Saber Power Services, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.75%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 46,038  
Investment, Identifier [Axis]: Saber Power Services, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,846 3,077
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Safety Borrower Holdings, LP 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 7,587  
Investment, Identifier [Axis]: Safety Borrower Holdings, LP 2 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[17]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 30  
Ending balance [3],[4],[11],[12],[14],[17]   $ 30
Investment, Identifier [Axis]: Safety Borrower Holdings, LP 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 35  
Investment, Identifier [Axis]: Safety Borrower Holdings, LP | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 917 917
Fair Value (2) $ 0
Investment, Identifier [Axis]: Safety Borrower Holdings, LP | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] 7,606  
Ending balance [3],[4],[12],[17]   $ 7,606
Investment, Identifier [Axis]: Safety Borrower Holdings, LP | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 611 611
Fair Value 0 0
Investment, Identifier [Axis]: Sail Bidco, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,910 1,910
Fair Value $ (10) $ 0
Investment, Identifier [Axis]: Sail Bidco, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[6],[7],[8],[13],[18] 0.17% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 10,680  
Ending balance 10,487 [1],[2],[6],[7],[8],[13],[18] $ 10,680 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 1 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.58%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 36,385  
Ending balance [3],[4],[12],[17]   $ 36,385
Investment, Identifier [Axis]: Sam Holding Co, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.59%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 36,290  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 2 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 15,640  
Ending balance [3],[4],[12],[17]   $ 15,640
Investment, Identifier [Axis]: Sam Holding Co, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.26%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 15,600  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 3 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 11,292  
Ending balance [3],[4],[12],[17]   $ 11,292
Investment, Identifier [Axis]: Sam Holding Co, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.18%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 11,263  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 4 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 9,849  
Ending balance [3],[4],[12],[17]   $ 9,849
Investment, Identifier [Axis]: Sam Holding Co, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 9,824  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 5 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[17]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 2,200  
Ending balance [3],[4],[11],[12],[14],[17]   $ 2,200
Investment, Identifier [Axis]: Sam Holding Co, Inc. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 11,879  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 6 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[17]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 11,909  
Ending balance [3],[4],[11],[12],[14],[17]   $ 11,909
Investment, Identifier [Axis]: Sam Holding Co, Inc. 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 2,195  
Investment, Identifier [Axis]: Sam Holding Co, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 9,800 9,800
Fair Value 0 0
Investment, Identifier [Axis]: Sam Holding Co, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,000 6,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Scientian 2 Spain, S.L. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 124  
Ending balance $ 122 [1],[2],[6],[7],[8],[18] $ 124 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Scientian France, SAS | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 273  
Ending balance 269 [1],[2],[6],[7],[8],[18] $ 273 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Scorpio BidCo SAS | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,818 4,818
Fair Value $ (51) $ (52)
Investment, Identifier [Axis]: Scorpio BidCo SAS | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[6],[7],[8],[13],[18] 0.43% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 26,773  
Ending balance $ 26,332 [1],[2],[6],[7],[8],[13],[18] $ 26,773 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Seahawk Bidco, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[13],[16] 0.83%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[13],[16] $ 50,580  
Investment, Identifier [Axis]: Seahawk Bidco, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 638  
Investment, Identifier [Axis]: Seahawk Bidco, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,169 2,656
Fair Value 0 0
Investment, Identifier [Axis]: Seahawk Bidco, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 20,814 20,814
Fair Value (52) $ 0
Investment, Identifier [Axis]: Seahawk Bidco, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[14],[17]   0.79%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] 49,124  
Ending balance [3],[4],[12],[14],[17]   $ 49,124
Investment, Identifier [Axis]: Seahawk Bidco, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,097 3,753
Fair Value $ 0 $ (34)
Investment, Identifier [Axis]: SelectQuote, Inc. - Warrants | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 72  
Ending balance 108 [1],[2],[6],[8] $ 72 [3],[4],[10],[12]
Investment, Identifier [Axis]: SelectQuote, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[29]   0.53%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[29] 32,853  
Ending balance [3],[4],[10],[11],[12],[29]   $ 32,853
Investment, Identifier [Axis]: Seven Bidco, SASU | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 689 689
Fair Value $ (3) $ (3)
Investment, Identifier [Axis]: Seven Bidco, SASU | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[6],[7],[8],[13],[18] 0.06% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 3,986  
Ending balance $ 3,920 [1],[2],[6],[7],[8],[13],[18] $ 3,986 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Shelf Bidco, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.43% [1],[2],[5],[6],[8],[24] 2.38% [3],[4],[9],[10],[12],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12],[26] $ 148,382  
Ending balance $ 148,007 [1],[2],[5],[6],[8],[24] $ 148,382 [3],[4],[9],[10],[12],[26]
Investment, Identifier [Axis]: Shelf Holdco, Ltd. - Common Equity | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 190  
Ending balance 190 [1],[2],[6],[8] $ 190 [3],[4],[10],[12]
Investment, Identifier [Axis]: Signant Finance One, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,696 8,696
Fair Value $ (43) $ 0
Investment, Identifier [Axis]: Signant Finance One, Ltd. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[2],[5],[7],[8],[13] 0.60% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 37,225  
Ending balance 37,434 [1],[2],[5],[7],[8],[13] $ 37,225 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Signant Finance One, Ltd. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,623 3,623
Fair Value (15) (36)
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 338 1,122
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[5],[6],[7],[8],[13] 0.14% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 9,019  
Ending balance 9,777 [1],[2],[5],[6],[7],[8],[13] $ 9,019 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,076 1,076
Fair Value $ (11) $ (11)
Investment, Identifier [Axis]: Smile Doctors, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[8] 0.17% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 10,319  
Ending balance $ 10,293 [1],[2],[5],[8] $ 10,319 [3],[4],[9],[12]
Investment, Identifier [Axis]: Smile Doctors, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[13] 0.04% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 2,454  
Ending balance 2,448 [1],[2],[5],[7],[8],[13] $ 2,454 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Smile Doctors, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,233 1,233
Fair Value $ (43) $ (43)
Investment, Identifier [Axis]: Snoopy Bidco, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.54% [1],[2],[5],[8] 5.44% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 339,635  
Ending balance 338,012 [1],[2],[5],[8] $ 339,635 [3],[4],[9],[12]
Investment, Identifier [Axis]: Solis Midco, SAS 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[14],[19]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 361  
Ending balance [3],[4],[10],[11],[12],[14],[19]   $ 361
Investment, Identifier [Axis]: Solis Midco, SAS 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 120  
Ending balance 117 [1],[2],[6],[7],[8],[18] $ 120 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Solis Midco, SAS | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 145 145
Fair Value $ 0 0
Investment, Identifier [Axis]: Solis Midco, SAS | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[13],[18] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[13],[18] $ 352  
Investment, Identifier [Axis]: Spaceship Purchaser, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 13,072 13,072
Fair Value $ (65) $ (65)
Investment, Identifier [Axis]: Spaceship Purchaser, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8],[13],[24] 0.08% [3],[4],[9],[11],[12],[14],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14],[26] $ 5,085  
Ending balance 5,071 [1],[2],[5],[8],[13],[24] $ 5,085 [3],[4],[9],[11],[12],[14],[26]
Investment, Identifier [Axis]: Spaceship Purchaser, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,894 10,894
Fair Value $ (109) $ (109)
Investment, Identifier [Axis]: Sparta UK Bidco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[6],[7],[8],[18] 0.38% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 23,965  
Ending balance $ 23,532 [1],[2],[6],[7],[8],[18] $ 23,965 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Sparta UK Bidco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[18] 0.01% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 552  
Ending balance $ 543 [1],[2],[6],[7],[8],[18] $ 552 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: SpecialtyCare, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[7],[8],[16] 0.19% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 12,143  
Ending balance $ 12,113 [1],[2],[7],[8],[16] $ 12,143 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: SpecialtyCare, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[13],[16] 0.00% [3],[4],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[19] $ 107  
Ending balance 96 [1],[2],[7],[8],[13],[16] $ 107 [3],[4],[11],[12],[14],[19]
Investment, Identifier [Axis]: SpecialtyCare, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 317 317
Fair Value 0 0
Investment, Identifier [Axis]: SpecialtyCare, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,047 1,047
Fair Value $ (10) $ 0
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC - Common Equity | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[6],[8] 0.10% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 6,186  
Ending balance $ 6,186 [1],[2],[6],[8] $ 6,186 [3],[4],[10],[12]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.13% [1],[2],[6],[8],[13],[20] 1.07% [3],[4],[10],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[21] $ 66,840  
Ending balance $ 68,884 [1],[2],[6],[8],[13],[20] $ 66,840 [3],[4],[10],[12],[14],[21]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[6],[7],[8],[20] 0.28% [3],[4],[10],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[21] $ 17,526  
Ending balance $ 17,194 [1],[2],[6],[7],[8],[20] $ 17,526 [3],[4],[10],[11],[12],[21]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[6],[7],[8],[20] 0.02% [3],[4],[10],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[21] $ 1,306  
Ending balance 2,087 [1],[2],[6],[7],[8],[20] $ 1,306 [3],[4],[10],[11],[12],[21]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 12,901 12,901
Fair Value 0 0
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 8,432 11,228
Fair Value 0 $ 0
Investment, Identifier [Axis]: Speedster Bidco, GmbH 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[14],[19]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[19] 117  
Ending balance [3],[4],[10],[12],[14],[19]   $ 117
Investment, Identifier [Axis]: Speedster Bidco, GmbH 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[19]   0.59%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 36,536  
Ending balance [3],[4],[10],[12],[19]   $ 36,536
Investment, Identifier [Axis]: Speedster Bidco, GmbH | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[18] 0.57%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[18] $ 34,775  
Investment, Identifier [Axis]: Speedster Bidco, GmbH | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,801 1,693
Fair Value $ (140) $ 0
Investment, Identifier [Axis]: Spitfire Parent, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[8],[16] 0.89% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 55,682  
Ending balance $ 20,714 [1],[2],[8],[16] $ 55,682 [3],[4],[12],[17]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[7],[8],[16] 0.33% [3],[4],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 20,560  
Ending balance 11,560 [1],[2],[7],[8],[16] $ 20,560 [3],[4],[12],[17]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[17]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 11,666  
Ending balance [3],[4],[11],[12],[17]   $ 11,666
Investment, Identifier [Axis]: Spitfire Parent, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.92%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 56,097  
Investment, Identifier [Axis]: Stark International Lux 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[8],[18] 0.02% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 1,221  
Ending balance $ 1,221 [1],[2],[6],[7],[8],[18] $ 1,221 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Stark International Lux 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[18] 0.00% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 215  
Ending balance $ 212 [1],[2],[6],[7],[8],[18] $ 215 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: State Street Institutional U.S. Government Money Market Fund - Investor Class    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2] 0.11% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 6,807  
Ending balance $ 7,158 [1],[2] $ 6,807 [3],[4]
Investment, Identifier [Axis]: State Street Institutional U.S. Government Money Market Fund - Premier Class    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.63% [1],[2] 0.27% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 17,168  
Ending balance 38,156 [1],[2] $ 17,168 [3],[4]
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12],[14]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] 2,894  
Ending balance [3],[4],[9],[12],[14]   $ 2,894
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 202  
Ending balance [3],[4],[9],[11],[12],[14]   $ 202
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 726 540
Fair Value $ 0 0
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[13] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[13] $ 3,089  
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 451 149
Fair Value $ (10) $ 0
Investment, Identifier [Axis]: TEI Intermediate, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[5],[8] 0.42% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 25,988  
Ending balance $ 26,166 [1],[2],[5],[8] $ 25,988 [3],[4],[9],[12]
Investment, Identifier [Axis]: TEI Intermediate, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 970  
Ending balance $ 970 [1],[2],[5],[7],[8],[13] $ 970 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: TEI Intermediate, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[7],[8],[13] 0.02% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,053  
Ending balance 5,387 [1],[2],[5],[7],[8],[13] $ 1,053 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: TEI Intermediate, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,869 7,203
Fair Value 0 0
Investment, Identifier [Axis]: TEI Intermediate, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,539 2,539
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: THG Acquisition, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[7],[8] 0.19% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 11,565  
Ending balance $ 11,536 [1],[2],[5],[7],[8] $ 11,565 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: THG Acquisition, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 924  
Ending balance 1,310 [1],[2],[5],[7],[8],[13] $ 924 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: THG Acquisition, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,601 1,841
Fair Value 0 0
Investment, Identifier [Axis]: THG Acquisition, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 980 1,128
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: THL Fund IX Investors (Plymouth II), LP - LP Interest | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 389  
Ending balance $ 379 [1],[2],[8] $ 389 [3],[4],[12]
Investment, Identifier [Axis]: TPG IX Newark CI, LP - LP Interest | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[8] 0.03% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 1,966  
Ending balance 1,879 [1],[2],[8] $ 1,966 [3],[4],[12]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 1 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 37,994  
Ending balance [3],[4],[12],[17]   $ 37,994
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[16] 0.62%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[16] $ 37,894  
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 2 | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[17]   0.53%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 33,330  
Ending balance [3],[4],[11],[12],[14],[17]   $ 33,330
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[16] 0.72%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[16] $ 43,915  
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 16,298  
Fair Value 0  
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   25,647
Fair Value   0
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   1,346
Fair Value   $ 0
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[17]   0.73%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[17] $ 45,759  
Ending balance [3],[4],[12],[17]   $ 45,759
Investment, Identifier [Axis]: Tango Bidco, SAS 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[2],[6],[7],[8],[18] 0.22% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 13,882  
Ending balance $ 13,654 [1],[2],[6],[7],[8],[18] $ 13,882 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tango Bidco, SAS 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[13],[18] 0.06% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 3,787  
Ending balance 4,282 [1],[2],[6],[7],[8],[13],[18] $ 3,787 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Tango Bidco, SAS | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 23,054 23,054
Fair Value 0 0
Investment, Identifier [Axis]: Tango Bidco, SAS | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 962 962
Fair Value (7) (7)
Investment, Identifier [Axis]: Tango Bidco, SAS | Delayed Draw Term Loan 3    
Schedule of Investments [Line Items]    
Unfunded commitments 1,058 1,580
Fair Value $ 0 0
Investment, Identifier [Axis]: Teneo Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[20] 1.91%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[20] $ 116,485  
Investment, Identifier [Axis]: Teneo Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[20] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[20] $ 4,259  
Investment, Identifier [Axis]: Teneo Holdings, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[20] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[20] $ 1,597  
Investment, Identifier [Axis]: Teneo Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,324 9,583
Fair Value 0 $ (48)
Investment, Identifier [Axis]: Teneo Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[14],[21]   1.86%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] 116,320  
Ending balance [3],[4],[11],[12],[14],[21]   $ 116,320
Investment, Identifier [Axis]: Teneo Holdings, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,115 11,712
Fair Value $ 0 $ (117)
Investment, Identifier [Axis]: Tennessee Bidco, Limited 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.41% [1],[2],[6],[8],[18] 1.36% [3],[4],[10],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[19] $ 84,934  
Ending balance $ 85,882 [1],[2],[6],[8],[18] $ 84,934 [3],[4],[10],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[6],[7],[8],[18] 0.32% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 19,750  
Ending balance $ 19,750 [1],[2],[6],[7],[8],[18] $ 19,750 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.00% [1],[2],[6],[7],[8],[18] 0.99% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 61,768  
Ending balance $ 61,264 [1],[2],[6],[7],[8],[18] $ 61,768 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[18] 0.07% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 4,657  
Ending balance $ 4,603 [1],[2],[6],[7],[8],[18] $ 4,657 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[6],[7],[8],[18] 0.04% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 2,252  
Ending balance $ 2,238 [1],[2],[6],[7],[8],[18] $ 2,252 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[6],[7],[8],[18] 0.18% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 11,056  
Ending balance $ 10,874 [1],[2],[6],[7],[8],[18] $ 11,056 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 7 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[6],[7],[8],[18] 0.11% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 6,639  
Ending balance $ 6,639 [1],[2],[6],[7],[8],[18] $ 6,639 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 8 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[13],[18] 0.01% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 512  
Ending balance $ 503 [1],[2],[6],[7],[8],[13],[18] $ 512 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited 9 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[18] 0.07% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 4,187  
Ending balance 4,118 [1],[2],[6],[7],[8],[18] $ 4,187 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Tennessee Bidco, Limited | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 13,160 13,160
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: The Fertility Partners, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[6],[7],[8] 0.07% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 4,596  
Ending balance $ 4,620 [1],[2],[5],[6],[7],[8] $ 4,596 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: The Fertility Partners, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[6],[7],[8],[13] 0.05% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 3,336  
Ending balance $ 3,311 [1],[2],[5],[6],[7],[8],[13] $ 3,336 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: The Fertility Partners, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[6],[7],[8] 0.00% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 255  
Ending balance 257 [1],[2],[5],[6],[7],[8] $ 255 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: The Fertility Partners, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 301 301
Fair Value (10) $ (12)
Investment, Identifier [Axis]: The Hiller Companies, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] 8,131  
Ending balance [3],[4],[9],[12]   $ 8,131
Investment, Identifier [Axis]: The Hiller Companies, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 2,128  
Ending balance [3],[4],[9],[11],[12],[14]   $ 2,128
Investment, Identifier [Axis]: The Hiller Companies, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 938  
Ending balance [3],[4],[9],[11],[12],[14]   $ 938
Investment, Identifier [Axis]: The Hiller Companies, LLC | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   121
Fair Value   0
Investment, Identifier [Axis]: The Hiller Companies, LLC | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   449
Fair Value   0
Investment, Identifier [Axis]: The Hiller Companies, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,432
Fair Value   $ 0
Investment, Identifier [Axis]: The North Highland Co, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[5],[7],[8] 0.25% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 15,585  
Ending balance $ 15,545 [1],[2],[5],[7],[8] $ 15,585 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: The North Highland Co, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 487  
Ending balance 613 [1],[2],[5],[7],[8],[13] $ 487 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: The North Highland Co, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,903 5,903
Fair Value (30) (30)
Investment, Identifier [Axis]: The North Highland Co, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,500 3,626
Fair Value 0 0
Investment, Identifier [Axis]: Themis Solutions, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,319 10,319
Fair Value $ (103) $ (137)
Investment, Identifier [Axis]: Themis Solutions, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[5],[6],[7],[8],[13] 0.38% [3],[4],[9],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12],[14] $ 23,735  
Ending balance 24,090 [1],[2],[5],[6],[7],[8],[13] $ 23,735 [3],[4],[9],[10],[11],[12],[14]
Investment, Identifier [Axis]: Themis Solutions, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 8,599 8,599
Fair Value $ (86) $ (120)
Investment, Identifier [Axis]: Thevelia US, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[20] 0.02% [3],[4],[10],[11],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[21] $ 1,277  
Ending balance $ 1,246 [1],[2],[6],[7],[20] $ 1,277 [3],[4],[10],[11],[21]
Investment, Identifier [Axis]: Thevelia US, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[20] 0.08% [3],[4],[10],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[21] $ 4,920  
Ending balance $ 4,920 [1],[2],[6],[7],[8],[20] $ 4,920 [3],[4],[10],[11],[12],[21]
Investment, Identifier [Axis]: Titan Investment Company, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15],[18] 0.23%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15],[18] $ 14,052  
Investment, Identifier [Axis]: Titan Investment Company, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[18] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[18] $ 1,476  
Investment, Identifier [Axis]: Titan Investment Company, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[13],[18] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[13],[18] $ 1,467  
Investment, Identifier [Axis]: Titan Investment Company, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 304  
Fair Value 0  
Investment, Identifier [Axis]: Titan Investment Company, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[19],[25]   0.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[19],[25] 31,242  
Ending balance [3],[4],[12],[19],[25]   $ 31,242
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,595 4,595
Fair Value $ (23) $ (23)
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[5],[8],[13] 0.38% [3],[4],[11],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[17] $ 23,787  
Ending balance 23,963 [1],[2],[5],[8],[13] $ 23,787 [3],[4],[11],[12],[14],[17]
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,872 2,872
Fair Value $ (29) $ (29)
Investment, Identifier [Axis]: Tricor Horizon - LP Interest | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[8] 0.01% [3],[4],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12] $ 394  
Ending balance $ 414 [1],[2],[6],[8] $ 394 [3],[4],[10],[12]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. - Common Units | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 6  
Ending balance $ 8 [1],[2],[8] $ 6 [3],[4],[12]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.97% [1],[2],[5],[8] 0.95% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 59,601  
Ending balance $ 59,452 [1],[2],[5],[8] $ 59,601 [3],[4],[9],[12]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.56% [1],[2],[5],[8],[13] 0.55% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 34,525  
Ending balance 34,438 [1],[2],[5],[8],[13] $ 34,525 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,269 7,269
Fair Value 0 0
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,433 1,433
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[8],[13],[16],[24] 0.08% [3],[4],[12],[14],[17],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17],[26] $ 5,153  
Ending balance $ 5,140 [1],[2],[8],[13],[16],[24] $ 5,153 [3],[4],[12],[14],[17],[26]
Investment, Identifier [Axis]: Triple Lift, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[5],[8] 0.20% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 12,444  
Ending balance $ 12,174 [1],[2],[5],[8] $ 12,444 [3],[4],[9],[12]
Investment, Identifier [Axis]: Triple Lift, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.67% [1],[2],[5],[8],[13] 0.68% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 42,163  
Ending balance 41,100 [1],[2],[5],[8],[13] $ 42,163 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Triple Lift, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,697 7,697
Fair Value $ (789) $ (654)
Investment, Identifier [Axis]: Turing Holdco, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[6],[7],[8],[18] 0.12% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 7,359  
Ending balance $ 7,267 [1],[2],[6],[7],[8],[18] $ 7,359 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Turing Holdco, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[6],[7],[8],[18] 0.06% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 3,659  
Ending balance $ 3,613 [1],[2],[6],[7],[8],[18] $ 3,659 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Turing Holdco, Inc. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[6],[7],[8],[18] 0.18% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 11,171  
Ending balance $ 10,835 [1],[2],[6],[7],[8],[18] $ 11,171 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Turing Holdco, Inc. 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[18] 0.07% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 4,240  
Ending balance $ 4,142 [1],[2],[6],[7],[8],[18] $ 4,240 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Turing Holdco, Inc. 5 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[5],[6],[8] 0.28% [3],[4],[9],[10],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12] $ 17,299  
Ending balance $ 17,079 [1],[2],[5],[6],[8] $ 17,299 [3],[4],[9],[10],[12]
Investment, Identifier [Axis]: Turing Holdco, Inc. 6 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[5],[6],[7],[8] 0.28% [3],[4],[9],[10],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[11],[12] $ 17,518  
Ending balance $ 16,987 [1],[2],[5],[6],[7],[8] $ 17,518 [3],[4],[9],[10],[11],[12]
Investment, Identifier [Axis]: UMP Holdings, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,041  
Ending balance $ 1,038 [1],[2],[5],[7],[8] $ 1,041 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: UMP Holdings, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 1,428  
Ending balance $ 1,424 [1],[2],[5],[7],[8] $ 1,428 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[2],[5],[8] 0.59% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 37,021  
Ending balance $ 37,021 [1],[2],[5],[8] $ 37,021 [3],[4],[9],[12]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[2],[5],[8] 0.25% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 15,616  
Ending balance $ 15,616 [1],[2],[5],[8] $ 15,616 [3],[4],[9],[12]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.78% [1],[2],[5],[8],[13] 0.76% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 47,649  
Ending balance $ 47,649 [1],[2],[5],[8],[13] $ 47,649 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8] 0.00% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 83  
Ending balance 83 [1],[2],[5],[7],[8] $ 83 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 21,535 21,535
Fair Value 0 0
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,735 3,735
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Unified Women's Healthcare, LP 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[20] 0.03% [3],[4],[11],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[21] $ 2,060  
Ending balance $ 2,055 [1],[2],[7],[8],[20] $ 2,060 [3],[4],[11],[12],[21]
Investment, Identifier [Axis]: Unified Women's Healthcare, LP 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.37% [1],[2],[8],[20] 0.36% [3],[4],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[21] $ 22,347  
Ending balance $ 22,291 [1],[2],[8],[20] $ 22,347 [3],[4],[12],[21]
Investment, Identifier [Axis]: Unified Women's Healthcare, LP 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.73% [1],[2],[8],[13],[20] 1.07% [3],[4],[11],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[21] $ 66,596  
Ending balance $ 44,401 [1],[2],[8],[13],[20] $ 66,596 [3],[4],[11],[12],[14],[21]
Investment, Identifier [Axis]: Unified Women's Healthcare, LP 4 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.95% [1],[2],[8],[20] 0.23% [3],[4],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[21] $ 14,492  
Ending balance 57,663 [1],[2],[8],[20] $ 14,492 [3],[4],[12],[21]
Investment, Identifier [Axis]: Unified Women's Healthcare, LP | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 17,083 38,333
Fair Value 0 0
Investment, Identifier [Axis]: Unified Women's Healthcare, LP | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 241 241
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Varicent Parent Holdings Corp. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[2],[5],[7],[8],[13] 0.21% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 13,035  
Ending balance $ 13,102 [1],[2],[5],[7],[8],[13] $ 13,035 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Varicent Parent Holdings Corp. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8],[13] 0.07% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 4,513  
Ending balance 4,828 [1],[2],[5],[7],[8],[13] $ 4,513 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Varicent Parent Holdings Corp. | Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,543 1,832
Fair Value (19) (18)
Investment, Identifier [Axis]: Varicent Parent Holdings Corp. | Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 1,045 1,045
Fair Value (5) 0
Investment, Identifier [Axis]: Varicent Parent Holdings Corp. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,050  
Fair Value (28)  
Investment, Identifier [Axis]: Varicent Parent Holdings Corp. | Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments   1,557
Fair Value   (23)
Investment, Identifier [Axis]: Varicent Parent Holdings Corp. | Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments   493
Fair Value   (5)
Investment, Identifier [Axis]: Veregy Consolidated, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,436 2,436
Fair Value $ (6) $ (6)
Investment, Identifier [Axis]: Veregy Consolidated, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.45% [1],[2],[5],[8],[13] 0.44% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 27,576  
Ending balance 27,507 [1],[2],[5],[8],[13] $ 27,576 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: Veregy Consolidated, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,845 5,845
Fair Value $ (44) $ (44)
Investment, Identifier [Axis]: Victory Buyer, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[8],[18] 0.15% [3],[4],[12],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[21] $ 9,619  
Ending balance $ 8,333 [1],[2],[8],[18] $ 9,619 [3],[4],[12],[21]
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[2],[5],[7],[8],[13] 0.34% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 21,027  
Ending balance $ 21,295 [1],[2],[5],[7],[8],[13] $ 21,027 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[5],[7],[8],[15] 0.12% [3],[4],[9],[11],[12],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[25] $ 7,484  
Ending balance 8,399 [1],[2],[5],[7],[8],[15] $ 7,484 [3],[4],[9],[11],[12],[25]
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,044 7,044
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: WHCG Purchaser, Inc. - Class A Common Units | | Non - Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[12]
Investment, Identifier [Axis]: WPEngine, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.10% [1],[2],[5],[8],[13] 1.06% [3],[4],[9],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12],[14] $ 66,467  
Ending balance 66,465 [1],[2],[5],[8],[13] $ 66,467 [3],[4],[9],[12],[14]
Investment, Identifier [Axis]: WPEngine, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,667 6,667
Fair Value $ (200) $ (200)
Investment, Identifier [Axis]: Water Holdings Acquisition, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[5],[8] 0.51% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 31,992  
Ending balance $ 32,201 [1],[2],[5],[8] $ 31,992 [3],[4],[9],[12]
Investment, Identifier [Axis]: Water Holdings Acquisition, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[5],[7],[8],[13] 0.06% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 3,922  
Ending balance 3,950 [1],[2],[5],[7],[8],[13] $ 3,922 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Water Holdings Acquisition, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,110 2,110
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: West Monroe Partners, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[5],[8] 0.23% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 14,301  
Ending balance $ 14,336 [1],[2],[5],[8] $ 14,301 [3],[4],[9],[12]
Investment, Identifier [Axis]: West Monroe Partners, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 460  
Ending balance $ 461 [1],[2],[5],[7],[8],[13] $ 460 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: West Monroe Partners, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.42% [1],[2],[5],[7],[8] 0.41% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 25,611  
Ending balance 25,676 [1],[2],[5],[7],[8] $ 25,611 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: West Monroe Partners, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,443 1,443
Fair Value $ (29) $ (29)
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7] 0.03% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 2,147  
Ending balance $ 2,141 [1],[2],[7] $ 2,147 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[13] 0.00% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 255  
Ending balance 375 [1],[2],[7],[13] $ 255 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 105 241
Fair Value 0 0
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 271 256
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Windows Acquisition Holdings, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.67% [1],[2],[7],[8],[16] 0.69% [3],[4],[11],[12],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[17] $ 43,387  
Ending balance 41,145 [1],[2],[7],[8],[16] $ 43,387 [3],[4],[11],[12],[17]
Investment, Identifier [Axis]: World Insurance Associates, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 15,725 17,695
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: World Insurance Associates, LLC | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.57% [1],[2],[8],[13],[16] 1.50% [3],[4],[12],[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[17] $ 93,825  
Ending balance 95,594 [1],[2],[8],[13],[16] $ 93,825 [3],[4],[12],[14],[17]
Investment, Identifier [Axis]: World Insurance Associates, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,473 4,473
Fair Value $ (66) $ (66)
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[7],[8] 0.12% [3],[4],[9],[11],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12] $ 7,770  
Ending balance $ 7,750 [1],[2],[5],[7],[8] $ 7,770 [3],[4],[9],[11],[12]
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[13] 0.01% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 878  
Ending balance 1,046 [1],[2],[5],[7],[8],[13] $ 878 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,679 2,787
Fair Value 0 0
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,110 1,170
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Zendesk, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 1,831  
Investment, Identifier [Axis]: Zendesk, Inc. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 123  
Investment, Identifier [Axis]: Zendesk, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] 1,839  
Ending balance [3],[4],[9],[11],[12],[14]   $ 1,839
Investment, Identifier [Axis]: Zendesk, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 169 169
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Zeus, LLC 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.38% [1],[2],[5],[8] 0.37% [3],[4],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] $ 23,021  
Ending balance $ 22,964 [1],[2],[5],[8] $ 23,021 [3],[4],[9],[12]
Investment, Identifier [Axis]: Zeus, LLC 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[9],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 1,968  
Ending balance $ 2,123 [1],[2],[5],[7],[8] $ 1,968 [3],[4],[9],[11],[12],[14]
Investment, Identifier [Axis]: Zeus, LLC 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[13] $ 243  
Investment, Identifier [Axis]: Zeus, LLC | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,284
Fair Value   0
Investment, Identifier [Axis]: Zeus, LLC | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,969 3,426
Fair Value $ 0 $ (17)
Investment, Identifier [Axis]: Zoro - Common Equity | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 26  
Ending balance $ 24 [1],[2],[8] $ 26 [3],[4],[12]
Investment, Identifier [Axis]: Zoro - Series A Preferred Shares | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12] $ 182  
Ending balance $ 136 [1],[2],[8] $ 182 [3],[4],[12]
Investment, Identifier [Axis]: Zorro Bidco, Ltd. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.63% [1],[2],[6],[7],[8],[13],[18] 0.62% [3],[4],[10],[11],[12],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14],[19] $ 38,544  
Ending balance $ 38,635 [1],[2],[6],[7],[8],[13],[18] $ 38,544 [3],[4],[10],[11],[12],[14],[19]
Investment, Identifier [Axis]: Zorro Bidco, Ltd. 2 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[18] 0.07% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 4,223  
Ending balance $ 4,147 [1],[2],[6],[7],[8],[18] $ 4,223 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Zorro Bidco, Ltd. 3 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[18] 0.07% [3],[4],[10],[11],[12],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[19] $ 4,666  
Ending balance 4,538 [1],[2],[6],[7],[8],[18] $ 4,666 [3],[4],[10],[11],[12],[19]
Investment, Identifier [Axis]: Zorro Bidco, Ltd. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,422 4,201
Fair Value 0 $ 0
Investment, Identifier [Axis]: eResearchTechnology, Inc. 1 | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[12]   2.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[12] 152,793  
Ending balance [3],[4],[9],[12]   $ 152,793
Investment, Identifier [Axis]: eResearchTechnology, Inc. | Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   24,793
Fair Value   $ 0
Investment, Identifier [Axis]: eResearchTechnology, Inc. | Non-Affiliated Issuer    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[11],[12],[14]   0.47%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[11],[12],[14] $ 29,261  
Ending balance [3],[4],[9],[11],[12],[14]   $ 29,261
Investment, Identifier [Axis]: eResearchTechnology, Inc. | Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   14,414
Fair Value   $ (144)
[1] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of March 31, 2026, the aggregate fair value of these securities is $13,941.7 million or 228.56% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[2] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of March 31, 2026, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[3] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of December 31, 2025, the aggregate fair value of these securities is $14,206.9 million or 227.48% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[4] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of December 31, 2025, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[5] The interest rate floor on these investments as of March 31, 2026 was 0.75%.
[6] The investment is not a Qualifying Asset under Section 55(a) of the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “1940 Act”). The Company may not acquire any non-qualifying asset unless, at the time of acquisition, Qualifying Assets represent at least 70% of the Company’s total assets. As of March 31, 2026, non-qualifying assets represented 18.0% of total assets as calculated in accordance with regulatory requirements.
[7] These investments are not pledged as collateral under any of the Company’s credit facilities. For other debt investments that are pledged to the Company’s credit facilities, a single investment may be divided into parts that are individually pledged as collateral to separate credit facilities. Any other debt investments listed above are pledged to financing facilities and are not available to satisfy the creditors of the Company.
[8] These investments were valued using unobservable inputs and are considered Level 3 investments. Fair value was determined in good faith by or under the direction of the Board of Trustees (see Note 2), pursuant to the Company’s valuation policy.
[9] The interest rate floor on these investments as of December 31, 2025 was 0.75%.
[10] The investment is not a Qualifying Asset under Section 55(a) of the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “1940 Act”). The Company may not acquire any non-qualifying asset unless, at the time of acquisition, Qualifying Assets represent at least 70% of the Company’s total assets. As of December 31, 2025, non-qualifying assets represented 17.2% of total assets as calculated in accordance with regulatory requirements.
[11] These investments are not pledged as collateral under any of the Company’s credit facilities. For other debt investments that are pledged to the Company’s credit facilities, a single investment may be divided into parts that are individually pledged as collateral to separate credit facilities. Any other debt investments listed above are pledged to financing facilities and are not available to satisfy the creditors of the Company.
[12] These investments were valued using unobservable inputs and are considered Level 3 investments. Fair value was determined in good faith by or under the direction of the Board of Trustees (see Note 2), pursuant to the Company’s valuation policy.
[13] Position or portion thereof is an unfunded commitment, and no interest is being earned on the unfunded portion, although the investment may be subject to unused commitment fees. Negative cost and fair value results from unamortized fees, which are capitalized to the investment cost. The unfunded commitment may be subject to a commitment termination date that may expire prior to the maturity date stated. See below for more information on the Company’s unfunded commitments:
[14] Position or portion thereof is an unfunded commitment, and no interest is being earned on the unfunded portion, although the investment may be subject to unused commitment fees. Negative cost and fair value results from unamortized fees, which are capitalized to the investment cost. The unfunded commitment may be subject to a commitment termination date that may expire prior to the maturity date stated. See below for more information on the Company’s unfunded commitments:
[15] Loan was on non-accrual status as of March 31, 2026.
[16] The interest rate floor on these investments as of March 31, 2026 was 1.00%.
[17] The interest rate floor on these investments as of December 31, 2025 was 1.00%.
[18] There are no interest rate floors on these investments.
[19] There are no interest rate floors on these investments.
[20] The interest rate floor on these investments as of March 31, 2026 was 0.50%.
[21] The interest rate floor on these investments as of December 31, 2025 was 0.50%.
[22] Under the 1940 Act, the Company would be deemed to “control” a portfolio company if the Company owned more than 25% of its outstanding voting securities and/or held the power to exercise control over the management or policies of the portfolio company. Under the 1940 Act, the Company would be deemed an “affiliated person” of a portfolio company if the Company owns 5% or more of the portfolio company’s outstanding voting securities. As of December 31, 2025, the Company’s non-controlled/affiliated investments were as follows:
Fair Value as of December 31, 2024
Gross AdditionsGross ReductionsNet Change in Unrealized Gains (Losses)Net Realized Gain (Loss)
Fair Value as of December 31, 2025
Dividend and Interest Income
Non-controlled/affiliated Investments
Align Precision Group, LLC$— $8,762 $— $— $— $8,762 $465 
Align Precision Group, LLC— 1,366 (3)7 — 1,370 106 
Align Precision Group, LLC - Class A-3 Units— 384 — 1,165 — 1,549 — 
Blackstone Donegal Holdings LP - LP Interests (Westland Insurance Group LTD) 6,403 — — (1,088)— 5,315 — 
Material Holdings, LLC21,547 931 (297)(107)— 22,074 2,612 
Material Holdings, LLC1,397 141 — (1,538)— — — 
Material Holdings, LLC— 726 — (1)— 725 12 
Material+ Holding Company, LLC - Class C Units— — — — — — — 
Total$29,347 $12,310 $(300)$(1,562)$— $39,795 $3,195 
[23] Under the 1940 Act, the Company would be deemed to “control” a portfolio company if the Company owned more than 25% of its outstanding voting securities and/or held the power to exercise control over the management or policies of the portfolio company. Under the 1940 Act, the Company would be deemed an “affiliated person” of a portfolio company if the Company owns 5% or more of the portfolio company’s outstanding voting securities. As of March 31, 2026, the Company’s non-controlled/affiliated investments were as follows:
[24] These loans are “last-out” portions of loans. The “last-out” portion of the Company’s loan investment generally earns a higher interest rate than the “first-out” portion, and in exchange the “first-out” portion would generally receive priority with respect to payment principal, interest and any other amounts due thereunder over the “last-out” portion.
[25] Loan was on non-accrual status as of December 31, 2025.
[26] These loans are “last-out” portions of loans. The “last-out” portion of the Company’s loan investment generally earns a higher interest rate than the “first-out” portion, and in exchange the “first-out” portion would generally receive priority with respect to payment principal, interest and any other amounts due thereunder over the “last-out” portion.
[27] The interest rate floor on these investments as of March 31, 2026 was 2.00%.
[28] The interest rate floor on these investments as of December 31, 2025 was 2.00%.
[29] The interest rate floor on these investments as of December 31, 2025 was 3.00%.
v3.26.1
Condensed Consolidated Schedule of Investments - Derivatives (Parenthetical)
€ in Thousands, £ in Thousands, kr in Thousands, kr in Thousands, kr in Thousands, $ in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Mar. 31, 2026
CAD ($)
Mar. 31, 2026
EUR (€)
Mar. 31, 2026
NOK (kr)
Mar. 31, 2026
DKK (kr)
Mar. 31, 2026
GBP (£)
Mar. 31, 2026
SEK (kr)
Dec. 31, 2025
CAD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
NOK (kr)
Dec. 31, 2025
DKK (kr)
Dec. 31, 2025
GBP (£)
Dec. 31, 2025
SEK (kr)
Open Forward Foreign Currency Contract [Line Items]                            
Notional $ 900,000 $ 643,979                        
Notional 1,831,878 1,678,873                        
Unrealized Appreciation (Depreciation) 8,723 2,711                        
Investment at cost 14,296,921 14,387,967                        
Investments at fair value $ 13,942,140 $ 14,207,294                        
Investment, Type [Extensible Enumeration] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member] Derivative [Member]
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 1                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional $ 65,701 $ 58,283                        
Notional     $ 90,000           $ 80,000          
Unrealized Appreciation (Depreciation) 974 (255)                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 2                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 75,631 76,983                        
Notional | €       € 65,250           € 65,250        
Unrealized Appreciation (Depreciation) 200 134                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 3                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 2,783 2,626                        
Notional | kr         kr 26,704           kr 26,704      
Unrealized Appreciation (Depreciation) 46 (22)                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 4                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 1,856 1,890                        
Notional | kr           kr 11,958           kr 11,958    
Unrealized Appreciation (Depreciation) 5 3                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 5                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 62,560 62,779                        
Notional | £             £ 47,000           £ 47,000  
Unrealized Appreciation (Depreciation) 611 (399)                        
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 6                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 23,347 20,291                        
Notional | kr               kr 217,760           kr 187,760
Unrealized Appreciation (Depreciation) 416 (146)                        
Foreign Exchange Contract                            
Open Forward Foreign Currency Contract [Line Items]                            
Unrealized Appreciation (Depreciation) 2,252 (685)                        
Interest Rate Swap                            
Open Forward Foreign Currency Contract [Line Items]                            
Notional 900,000 500,000                        
Notional 1,600,000 1,600,000                        
Investments at fair value 20,293 20,318                        
Upfront Payments / Receipts 0 0                        
Change in Unrealized Appreciation (Depreciation) $ (24) $ 23,487 [1]                        
Interest Rate Swap 1                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88% 5.88%
Company Pays 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38% 1.38%
Investment at cost $ 400,000 $ 400,000                        
Investments at fair value 11,205 8,251                        
Upfront Payments / Receipts 0 0                        
Change in Unrealized Appreciation (Depreciation) $ 2,954 $ 4,256 [1]                        
Interest Rate Swap 2                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35%
Company Pays 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65% 1.65%
Investment at cost $ 400,000 $ 400,000                        
Investments at fair value 5,343 2,488                        
Upfront Payments / Receipts 0 0                        
Change in Unrealized Appreciation (Depreciation) $ 2,855 $ 8,343 [1]                        
Interest Rate Swap 3                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35% 5.35%
Company Pays 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39% 1.39%
Investment at cost $ 300,000 $ 300,000                        
Investments at fair value 1,834 3,803                        
Upfront Payments / Receipts 0 0                        
Change in Unrealized Appreciation (Depreciation) $ (1,969) $ 5,112 [1]                        
Interest Rate Swap 4                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30%
Company Pays 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46% 1.46%
Investment at cost $ 500,000 $ 500,000                        
Investments at fair value 10,635 7,665                        
Upfront Payments / Receipts 0 0                        
Change in Unrealized Appreciation (Depreciation) $ 2,970 $ 7,665 [1]                        
Interest Rate Swap 5                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13% 5.13%
Company Pays 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66% 1.66%
Investment at cost $ 500,000 $ 500,000                        
Investments at fair value (4,545) (1,889)                        
Upfront Payments / Receipts 0 0                        
Change in Unrealized Appreciation (Depreciation) $ (2,656) $ (1,889) [1]                        
Interest Rate Swap 6                            
Open Forward Foreign Currency Contract [Line Items]                            
Company Receives 5.25%   5.25% 5.25% 5.25% 5.25% 5.25% 5.25%            
Company Pays 1.93%   1.93% 1.93% 1.93% 1.93% 1.93% 1.93%            
Investment at cost $ 400,000                          
Investments at fair value (4,179)                          
Upfront Payments / Receipts 0                          
Change in Unrealized Appreciation (Depreciation) $ (4,178)                          
[1] For interest rate swaps designated in qualifying hedge relationships, the change in fair value is recorded in Interest expense in the Condensed Consolidated Statements of Operations.
v3.26.1
Organization
 3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Organization Organization
Blackstone Secured Lending Fund (together with its consolidated subsidiaries, the “Company”), is a Delaware statutory trust formed on March 26, 2018, and structured as an externally managed, non-diversified, closed-end management investment company. On October 26, 2018, the Company elected to be regulated as a business development company (a “BDC”) under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “1940 Act”). In addition, the Company has elected to be treated for U.S. federal income tax purposes, and intends to qualify annually, as a regulated investment company (a “RIC”), under Subchapter M of the Internal Revenue Code of 1986, as amended (together with the rules and regulations promulgated thereunder, the “Code”).
The Company is externally managed by Blackstone Private Credit Strategies LLC (the “Adviser”) and Blackstone Credit BDC Advisors LLC (the “Sub-Adviser” and, together with the Adviser, the “Advisers”). The Advisers are affiliates of Blackstone Alternative Credit Advisors LP (the “Sub-Administrator” and, collectively with its affiliates in the credit, asset based finance and insurance asset management business unit of Blackstone Inc. (“Blackstone”), “Blackstone Credit & Insurance,” or “BXCI”). Additionally, Blackstone Private Credit Strategies LLC, in its capacity as the administrator to the Company (in such capacity, the “Administrator” and, together with the Sub-Administrator, the “Administrators”), and the Sub-Administrator provide certain administrative and other services necessary for the Company to operate pursuant to an administration agreement between the Administrator and the Company (the “Administration Agreement”) and a sub-administration agreement between the Administrator and the Sub-Administrator (the “Sub-Administration Agreement,” and together with the Administration Agreement, the “Administration Agreements”), respectively. From commencement through December 31, 2024, Blackstone Credit BDC Advisors LLC served as the Company’s investment adviser (in such capacity, the “Prior Adviser”) and Blackstone Alternative Credit Advisors LP served as the Company’s administrator (in such capacity, the “Prior Administrator”).
The Company’s investment objectives are to generate current income and, to a lesser extent, long-term capital appreciation. The Company seeks to achieve its investment objectives primarily through originated loans and other securities, including syndicated loans, of private U.S. companies, typically in the form of first lien senior secured and unitranche loans (including first out/last out loans), and to a lesser extent, second lien, third lien, unsecured and subordinated loans and other debt and equity securities.
The Company commenced its loan origination and investment activities on November 20, 2018.
On October 28, 2021, the Company priced its initial public offering (“IPO”), and the Company’s common shares of beneficial interest (“Common Shares”) began trading on the New York Stock Exchange (“NYSE”). See “Note 9. Net Assets” for further details.
v3.26.1
Significant Accounting Policies
 3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]  
Significant Accounting Policies Significant Accounting Policies
Basis of Presentation
The condensed consolidated financial statements have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the requirements for reporting on Form 10-Q and Article 6 and 10 of Regulation S-X. Accordingly, certain disclosures accompanying the annual consolidated financial statements prepared in accordance with GAAP are omitted. As an investment company, the Company applies the accounting and reporting guidance in Accounting Standards Codification (“ASC”) Topic 946, Financial Services—Investment Companies (“ASC 946”) issued by the Financial Accounting Standards Board (“FASB”).
In the opinion of management, all adjustments considered necessary for the fair presentation of the condensed consolidated financial statements for the interim period presented have been included. The current period’s results of operations will not necessarily be indicative of results that ultimately may be achieved for the fiscal year ending December 31, 2026.
All intercompany balances and transactions have been eliminated.
Certain prior period information has been reclassified to conform to the current period presentation.
Use of Estimates
The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements. Such amounts could differ from those estimates and such differences could be material. Assumptions and estimates regarding the valuation of investments involve a higher degree of judgment and complexity and these assumptions and estimates may be significant to the condensed consolidated financial statements. Actual results may ultimately differ from those estimates.
Consolidation
As provided under ASC 946, the Company will not consolidate its investment in a company other than an investment company subsidiary or a controlled operating company whose business consists of providing services to the Company.
The Company consolidated the results of the Company’s wholly-owned subsidiaries which are considered to be investment companies. As of March 31, 2026, the Company’s consolidated subsidiaries were BGSL Jackson Hole Funding LLC (“Jackson Hole Funding”), BGSL Breckenridge Funding LLC (“Breckenridge Funding”), BGSL Big Sky Funding LLC (“Big Sky Funding”), BXSL CLO 2024-1 LLC (the “2024-1 Issuer”), BXSL CLO 2024-1 Depositor LLC, BXSL CLO 2025-1 LLC (“BXSL CLO 2025-1”), BGSL Investments LLC (“BGSL Investments”), BXSL Associates GP (Lux) S.à r.l, BXSL Direct Lending (Lux) SCSp, BXSL C-1 LLC, and BXSL C-2 Funding LLC.
Cash and Cash Equivalents and Restricted Cash
Cash and cash equivalents consist of demand deposits and highly liquid investments, such as money market funds, with original maturities of three months or less. Cash and cash equivalents are carried at cost, which approximates fair value. The Company deposits its cash and cash equivalents with financial institutions which, at times, may exceed the Federal Deposit Insurance Corporation insured limit. Restricted cash and cash equivalents include amounts that are collected and are held by trustees who have been appointed as custodians of the assets securing certain of the Company’s financing transactions. Restricted cash and cash equivalents are held by the trustees for payment of interest expense and principal on the outstanding borrowings or reinvestment into new assets.
Investments
Investment transactions are recorded on a trade date basis.
Realized gains or losses are measured by the difference between the net proceeds received (excluding prepayment fees, if any) and the amortized cost basis of the investment using the specific identification method without regard to unrealized gains or losses previously recognized, and include investments charged off during the period, net of recoveries, and is recorded within Net realized gain (loss) on the Condensed Consolidated Statements of Operations.
The net change in unrealized gains or losses primarily reflects the change in investment values, including the reversal of previously recorded unrealized gains or losses with respect to investments realized during the period, and is recorded within Net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations.
Valuation of Investments
The Company is required to report its investments, including those for which current market values are not readily available, at fair value.
The Company values its investments in accordance with ASC 820, Fair Value Measurements (“ASC 820”), which defines fair value as the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the applicable measurement date, and Rule 2a-5 under the 1940 Act.
Under ASC 820, fair value is based on observable market prices or parameters or derived from such prices or parameters when such quotations are readily available. In accordance with Rule 2a-5 under the 1940 Act, fair value means the value of a portfolio investment for which market quotations are not readily available. A market quotation is “readily available” only when it is a quoted price (unadjusted) in active markets for identical instruments that a fund can access at the measurement date, provided that such a quotation is not considered to be readily available if it is not reliable.
Where prices or inputs are not available or, in the judgment of the Board of Trustees (the “Board” or the “Board of Trustees”), with assistance of the Advisers, the Audit Committee and independent valuation firm(s), determined to be not reliable, valuation techniques based on the facts and circumstances of the particular investment will be utilized. These valuation approaches involve some level of management estimation and judgment, the degree of which is dependent on the price transparency for the investments or market and the investments’ complexity. In the absence of observable, reliable market prices, the Company values its investments using various valuation methodologies applied on a consistent basis.
An enterprise value (“EV”) analysis is generally performed to determine the value of equity investments, control debt investments and non-control debt investments that are credit-impaired, and to determine if debt investments are credit-impaired. The Advisers will generally utilize approaches including the market approach, the income approach or both approaches, as appropriate, when calculating EV. The primary method for determining EV for non-control investments, and control investments without reliable projections, uses a multiple analysis whereby appropriate multiples are applied to the portfolio company’s earnings before interest, taxes, depreciation and amortization (“EBITDA”) or another key financial metric (e.g., such as revenues, cash flows or net income) (“Performance Multiple”). Performance Multiples are typically determined based upon a review of publicly-traded comparable companies and market comparable transactions, if any. The second method for determining EV (and primary method for control investments with reliable projections) uses a discounted cash flow analysis whereby future expected cash flows and the anticipated terminal value of the portfolio company are discounted to determine a present value using estimated discount rates. The income approach is generally used when the Advisers have visibility into the long-term projected cash flows of a portfolio company.
If debt investments are credit-impaired, which occurs when there is insufficient coverage under the enterprise value analysis through the respective investment’s position in the capital structure, the Advisers generally use the enterprise value “waterfall” approach or a recovery method (if a liquidation or restructuring is deemed likely) to determine fair value. For debt investments that are not determined to be credit-impaired, the Advisers generally use a market interest rate yield analysis to determine fair value. To determine fair value using a yield analysis, the expected cash flows are projected based on the contractual terms of the debt security and discounted back to the measurement date based on a market yield. A market yield is determined based upon an assessment of current and expected market yields for similar investments and risk profiles. The Company considers the current contractual interest rate, the maturity and other terms of the investment relative to risk of the company and the specific investment. A key determinant of risk, among other things, is the leverage through the investment relative to the enterprise value of the portfolio company. As debt investments held by the Company are substantially illiquid with no active transaction market, the Company depends on primary market data, including newly funded transactions, as well as secondary market data with respect to high yield debt instruments and syndicated loans, as inputs in determining the appropriate market yield, as applicable. The fair value of loans with call protection is generally capped at par plus applicable prepayment premium in effect at the measurement date.
ASC 820 prioritizes the use of observable market prices derived from such prices. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The levels used for classifying investments are not necessarily an indication of the risk associated with investing in these securities. The three levels of the fair value hierarchy are as follows:
•Level 1: Inputs to the valuation methodology are quoted prices available in active markets for identical instruments as of the reporting date. The types of financial instruments included in Level 1 may include unrestricted securities, including equities and derivatives, listed in active markets.
•Level 2: Inputs to the valuation methodology are other than quoted prices in active markets, which are either directly or indirectly observable as of the reporting date. The types of financial instruments in this category may include less liquid and restricted securities listed in active markets, securities traded in other than active markets, government and agency securities and certain over-the-counter derivatives where the fair value is based on observable inputs.
•Level 3: Inputs to the valuation methodology are unobservable and significant to overall fair value measurement. The inputs into the determination of fair value require significant management judgment or estimation. Financial instruments that are included in this category may include debt and equity investments in privately held entities, collateralized loan obligations (“CLOs”) and certain over-the-counter derivatives where the fair value is based on unobservable inputs.
In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment’s level within the fair value hierarchy is based on the lowest level of input that is significant to the overall fair value measurement. The Board’s assessment, with the assistance of the Advisers, the Audit Committee and independent valuation firm(s), of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Transfers between levels, if any, are recognized at the beginning of the quarter in which the transfer occurs.
The Company evaluates the source of the inputs, including any markets in which its investments are trading (or any markets in which securities with similar attributes are trading), in determining fair value. When an investment is valued based on prices provided by reputable dealers or pricing services (that is, broker quotes), the Company subjects those prices to various criteria in making the determination as to whether a particular investment would qualify for treatment as a Level 2 or Level 3 investment.
Due to the inherent uncertainty of determining the fair value of investments that do not have a readily available market value, the fair value of the Company’s investments may fluctuate from period to period, and these differences could be material. Additionally, the fair value of the Company’s investments may differ significantly from the values that would have been used had a ready market existed for such investments and may differ materially from the values that the Company may ultimately realize. Further, such investments are generally subject to legal and other restrictions on resale or otherwise are less liquid than publicly-traded securities. If the Company was required to liquidate a portfolio investment in a forced or liquidation sale, it could realize significantly less than the value at which the Company has recorded it. In addition, changes in the market environment and other events that may occur over the life of the investments may cause the gains or losses ultimately realized on these investments to be different than the unrealized gains or losses reflected in the valuations currently assigned. See “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Estimates.”
Receivables/Payables From Investments Sold/Purchased
Receivables/payables from investments sold/purchased consist of amounts receivable to or payable by the Company for transactions that have not settled at the reporting date.
Derivative Instruments
The Company recognizes all derivative instruments as assets or liabilities at fair value in its Condensed Consolidated Statements of Assets and Liabilities as Derivative assets at fair value and Derivative liabilities at fair value, respectively.
In the normal course of business, the Company has commitments and risks resulting from its investment transactions, which may include those involving derivative instruments. Derivative instruments are measured in terms of the notional contract amount and derive their value based upon one or more underlying instruments. While the notional amount gives some indication of the Company’s derivative activity, it generally is not exchanged, but is only used as the basis on which interest and other payments are exchanged. Derivative instruments are subject to various risks similar to non-derivative instruments including market, credit, liquidity, and operational risks. The Company manages these risks on an aggregate basis as part of its risk management process.
From time to time, the Company may enter into forward currency contracts which is an obligation between two parties to purchase or sell a specific currency for an agreed-upon price at a future date. The Company utilizes forward currency contracts to economically hedge the currency exposure associated with certain foreign currency denominated assets and liabilities of the Company. The use of forward currency contracts does not eliminate fluctuations in the price of the underlying debt the Company has, but establishes a rate of exchange in advance. Fluctuations in the value of these contracts are measured by the difference in the exchange rates on the contract date and reporting date and are recorded as net change in unrealized appreciation (depreciation). The fair value of the foreign currency forwards is included as Derivative assets at fair value or Derivative liabilities at fair value on the Company’s Condensed Consolidated Statements of Assets and Liabilities. Changes in
the fair value of the foreign currency forwards are presented in Net change in unrealized appreciation (depreciation): Derivative instruments and Net realized gains (losses): Derivative instruments in the Condensed Consolidated Statements of Operations.
Additionally, the Company uses interest rate swaps to mitigate interest rate risk associated with the Company’s fixed rate liabilities. The fair value of the interest rate swaps is included as Derivative assets at fair value or Derivative liabilities at fair value on the Company’s Condensed Consolidated Statements of Assets and Liabilities. Changes in fair value of interest rate swaps entered into by the Company and not designated as hedging instruments are presented in Net realized gains (losses) and Net change in unrealized appreciation (depreciation) in the Condensed Consolidated Statements of Operations. The Company designated certain interest rate swaps as the hedging instrument in a qualifying fair value hedge accounting relationship, and therefore the change in fair value of the hedging instrument and hedged item are recorded in Interest expense and recognized as components of Interest expense in the Condensed Consolidated Statements of Operations. The change in fair value of the interest rate swap is offset by a change in the carrying value of the fixed rate debt.
The fair values of derivative instruments are presented on a net basis in the Condensed Consolidated Statements of Assets and Liabilities when they are with the same counterparty, the Company has determined it has a legal right to offset the recognized amounts, and it intends to either settle on a net basis. The Company has elected to offset cash collateral posted to or received from its counterparty against the net fair value of derivative instruments with that counterparty when an enforceable master netting agreement is in place that provides the Company, in the event of counterparty default, the right to liquidate collateral and the right to offset a counterparty’s rights and obligations.
Forward Purchase Agreement
Forward purchase agreements are recognized at fair value through current period gains or losses on the date on which the contract is entered into and are subsequently re-measured at fair value. All forward purchase agreements are carried as assets when fair value is positive and as liabilities when fair value is negative. A forward purchase agreement is derecognized when the obligation specified in the contract is discharged, canceled or expired.
Foreign Currency Transactions
Amounts denominated in foreign currencies are translated into U.S. dollars (“USD”) on the following basis: (i) investments and other assets and liabilities denominated in foreign currencies are translated into USD based upon currency exchange rates effective on the last business day of the period; and (ii) purchases and sales of investments, borrowings and repayments of such borrowings, income, and expenses denominated in foreign currencies are translated into USD based upon currency exchange rates prevailing on the transaction dates.
The Company includes net changes in fair values on investments held resulting from foreign exchange rate fluctuations in Translation of assets and liabilities in foreign currencies on the Condensed Consolidated Statements of Operations, if any. Foreign security and currency transactions may involve certain considerations and risks not typically associated with investing in U.S. companies and U.S. government securities. These risks include, but are not limited to, currency fluctuations and revaluations and future adverse political, social and economic developments, which could cause investments in foreign markets to be less liquid and prices more volatile than those of comparable U.S. companies or U.S. government securities.
Revenue Recognition
Interest Income
Interest income is recorded on an accrual basis and includes the accretion of discounts and amortizations of premiums. Discounts from and premiums to par value on debt investments purchased are accreted/amortized into interest income over the life of the respective security using the effective interest method. The amortized cost of debt investments represents the original cost, including loan origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion of discounts and amortization of premiums, if any. Upon prepayment of a loan or debt security, any prepayment premiums, unamortized upfront loan origination fees and unamortized discounts are recorded as interest income in the current period. For the three months ended March 31, 2026 and 2025, the Company recorded $2.5 million and $12.9 million, respectively, in non-recurring interest income (e.g., prepayment premiums, accelerated accretion of upfront loan origination fees and unamortized discounts).
PIK Income
The Company has investments in its portfolio that contain payment-in-kind (“PIK”) provisions. PIK represents interest that is accrued and recorded as interest income at the contractual rates, increases the loan principal on the respective capitalization dates, and is generally due at maturity. Such income is included in Payment-in-kind interest income in the Condensed Consolidated Statements of Operations. If at any point the Company expects that PIK will not be realized, the investment generating PIK will be placed on non-accrual status. When a PIK investment is placed on non-accrual status, the accrued, uncapitalized interest is generally reversed through Payment-in-kind interest income. To satisfy the Company’s annual RIC distribution requirements, this non-cash source of income must be included in determining the amounts to be paid out to shareholders in the form of dividends, even though the Company has not yet collected cash.
Dividend Income
Dividend income on preferred equity securities is recorded on an accrual basis to the extent that such amounts are payable by the portfolio company and are expected to be collected. Dividend income on common equity securities is recorded on the record date for private portfolio companies or on the ex-dividend date for publicly-traded portfolio companies.
Other Income
The Company may receive various fees in the ordinary course of business such as structuring, consent, waiver, amendment, syndication and other miscellaneous fees, as well as fees for managerial assistance rendered by the Company to the portfolio companies. Such fees are recognized as income when earned or the services are rendered.
Non-Accrual Income
Loans are generally placed on non-accrual status when there is reasonable doubt whether principal or interest will be collected in full. Accrued interest is generally reversed when a loan is placed on non-accrual status. Additionally, any original issue discount and market discount are no longer accreted to interest income as of the date the loan is placed on non-accrual status. Interest payments received on non-accrual loans may be recognized as income or applied to principal depending upon management’s judgment regarding collectability. Non-accrual loans are restored to accrual status when past due principal and interest is paid current and, in management’s judgment, are likely to remain current. Management may make exceptions to this treatment and determine to not place a loan on non-accrual status if the loan has sufficient collateral value and is in the process of collection.
For further information regarding the non-accrual status of investments, refer to “Note 4. Investments.”
Offering Expenses
The Company records expenses related to public equity offerings as a reduction of capital upon completion of an offering of registered securities. The costs associated with any renewals of a shelf registration statement will be expensed as incurred.
Deferred Financing Costs and Debt Issuance Costs
Deferred financing and debt issuance costs represent fees and other direct incremental costs incurred in connection with the Company’s borrowings and debt issuance costs include premiums and discounts to the par value of the respective instruments. These expenses and adjustments are deferred and amortized into interest expense over the life of the related debt instrument. Deferred financing costs related to revolving credit facilities are presented separately as an asset on the Company’s Condensed Consolidated Statements of Assets and Liabilities. Debt issuance costs, including premiums and discounts to par, related to any issuance of installment debt or notes are presented net against the outstanding debt balance of the related security.
Income Taxes
The Company has elected to be treated as a BDC under the 1940 Act. The Company also has elected to be treated as a RIC under the Code. So long as the Company maintains its tax treatment as a RIC, it generally will not pay corporate-level U.S. federal income taxes on any ordinary income or capital gains that it distributes at least annually to its shareholders as dividends. Rather, any tax liability related to income earned and distributed by the Company would represent obligations of the Company’s investors and would not be reflected in the condensed consolidated financial statements of the Company.
The Company evaluates tax positions taken or expected to be taken in the course of preparing its condensed consolidated financial statements to determine whether the tax positions are “more-likely-than-not” to be sustained by the applicable tax authority. Tax positions not deemed to meet the “more-likely-than-not” threshold are reserved and recorded as a tax benefit or expense in the current year. All penalties and interest associated with income taxes are included in income tax expense. Conclusions regarding tax positions are subject to review and may be adjusted at a later date based on factors including, but not limited to, on-going analyses of tax laws, regulations and interpretations thereof. Management has analyzed the Company’s tax positions taken, or to be taken, on federal income tax returns for all open tax years, and has concluded that there are no material uncertain tax positions through March 31, 2026. As applicable, the Company’s federal tax returns are subject to examination by the Internal Revenue Service for a period of three fiscal years after they are filed.
To qualify for and maintain qualification as a RIC, the Company must, among other things, meet certain source-of-income and asset diversification requirements. In addition, to qualify for RIC tax treatment, the Company must distribute to its shareholders, for each taxable year, at least 90% of the sum of (i) its “investment company taxable income” for that year (without regard to the deduction for dividends paid), which is generally its ordinary income plus the excess, if any, of its realized net short-term capital gains over its realized net long-term capital losses and (ii) its net tax-exempt income.
In addition, based on the excise tax distribution requirements, the Company is subject to a 4% nondeductible federal excise tax on certain undistributed income unless the Company distributes in a timely manner in each taxable year an amount at least equal to the sum of (i) 98% of its ordinary income for the calendar year, (ii) 98.2% of its capital gain net income (both long-term and short-term) for the one-year period ending October 31 in that calendar year and (iii) any income realized, but not distributed, in prior years. For this purpose, however, any ordinary income or capital gain net income retained by the Company that is subject to corporate income tax is considered to have been distributed.
For the three months ended March 31, 2026 and 2025, the Company accrued $4.1 million and $4.2 million, respectively, of U.S. federal excise tax.
Certain of the Company’s consolidated subsidiaries are subject to certain U.S. federal and state income taxes. Income tax expense, if any, is included under the income category for which it applies in the Condensed Consolidated Statements of Operations.
Distributions
To the extent that the Company has taxable income available, the Company intends to make quarterly distributions to its shareholders. Distributions to shareholders are recorded on the record date. All distributions will be paid at the discretion of the Board and will depend on the Company’s earnings, financial condition, maintenance of the Company’s tax treatment as a RIC, compliance with applicable BDC regulations and such other factors as the Board may deem relevant from time to time.
Segment Reporting
The Company operates as a single reportable segment and as a result, the Company’s segment accounting policies are consistent with those described herein and the Company does not have any intra-segment sales and transfers of assets. See “Note 12. Segment Reporting” for further information.
Recent Accounting Pronouncements
In December 2025, the FASB issued Accounting Standards Update (“ASU”) 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements,” (“ASU 2025-09”). ASU 2025-09 amends the guidance in ASU 815, Derivatives and Hedging and refines certain hedge accounting requirements, including clarifications to the designation and documentation criteria for hedge relationships, improvements to the assessment of hedge effectiveness, and enhanced disclosures intended to provide greater transparency into an entity's risk management activities involving derivatives. ASU 2025-09 is effective for annual periods beginning after December 15, 2026, including interim periods within those annual periods, and early adoption is permitted. The Company has not early adopted and does not expect the adoption of ASU 2025-09 to have a material impact on its condensed consolidated financial statements.
v3.26.1
Agreements and Related Party Transactions
 3 Months Ended
Mar. 31, 2026
Related Party Transactions [Abstract]  
Agreements and Related Party Transactions Agreements and Related Party Transactions
Advisory Agreements
On October 1, 2018, the Company entered into the original investment advisory agreement with the Prior Adviser (the “Original Investment Advisory Agreement”), pursuant to which the Prior Adviser was responsible for originating prospective investments, conducting research and due diligence investigations on potential investments, analyzing investment opportunities, negotiating and structuring the Company’s investments and monitoring its investments and portfolio companies on an ongoing basis.
On October 18, 2021, the Company and the Prior Adviser entered into an amended and restated investment advisory agreement (the “Original A&R Investment Advisory Agreement”). The Original A&R Investment Advisory Agreement was substantially the same as the Original Investment Advisory Agreement except, following the IPO, the incentive fee on income became subject to a twelve-quarter lookback quarterly hurdle rate of 1.50% as opposed to a single quarter measurement and became subject to an Incentive Fee Cap (as defined below) based on the Company’s Cumulative Net Return (as defined below). The amendment to the Original Investment Advisory Agreement did not result in higher fees (on a cumulative basis) payable to the Prior Adviser than the fees that would have otherwise been payable to the Prior Adviser under the Original Investment Advisory Agreement.
On November 7, 2024, the Board approved the Prior Adviser’s assignment of the Original A&R Investment Advisory Agreement to the Adviser pursuant to Rule 2a-6 under the 1940 Act, effective January 1, 2025. The Board, including a majority of the trustees who are not “interested persons” (as such term is defined in Section 2(a)(19) of the 1940 Act) (the “Independent Trustees”), also approved the second amended and restated investment advisory agreement (the “Investment Advisory Agreement”) to acknowledge such assignment. Accordingly, effective January 1, 2025, the Adviser became the Company’s investment adviser pursuant to the Investment Advisory Agreement. Further, on November 7, 2024, the Board approved the sub-advisory agreement (the “Sub-Advisory Agreement,” and together with the Investment Advisory Agreement, the “Advisory Agreements”) between the Company, the Adviser and the Sub-Adviser. Accordingly, effective January 1, 2025, the Sub-Adviser became the Company’s investment sub-adviser pursuant to the Sub-Advisory Agreement. These changes were the result of a reorganization of certain subsidiaries of Blackstone and did not result in any change in the aggregate fees paid by the Company. Further, the nature and level of services provided to the Company remain the same, as well as the personnel that provide investment management services to the Company on behalf of the Advisers.
The Advisory Agreements were most recently renewed and approved by the Board, including a majority of the Independent Trustees, on April 29, 2026, for an additional annual period, and, unless terminated earlier, will renew from year-to-year thereafter if approved annually by a majority of the Board or by the holders of a majority of the Company’s outstanding voting securities and, in each case, a majority of the Independent Trustees. The Company may terminate the Advisory Agreements, without payment of any penalty, upon 60 days’ written notice. The Advisory Agreements will automatically terminate in the event of their assignment within the meaning of the 1940 Act and related U.S. Securities and Exchange Commission (“SEC”) guidance and interpretations.
The Company pays the Adviser a fee for its services under the Investment Advisory Agreement consisting of two components: a management fee and an incentive fee. The cost of both the management fee and the incentive fee is borne by the shareholders. The sub-advisory fees payable to the Sub-Adviser under the Sub-Advisory Agreement will be paid by the Adviser out of its own advisory fees rather than paid separately by the Company.
Base Management Fees
Starting from the consummation of the IPO, the management fee pursuant to the Investment Advisory Agreement is payable quarterly in arrears at an annual rate of 1.0% of the average value of the Company’s “gross assets” at the end of the two most recently completed calendar quarters. For purposes of the Investment Advisory Agreement, “gross assets” means the Company’s total assets determined on a consolidated basis in accordance with GAAP, excluding undrawn commitments but including assets purchased with borrowed amounts.
For the three months ended March 31, 2026 and 2025, base management fees were $36.4 million and $34.3 million, respectively. As of March 31, 2026 and December 31, 2025, $36.4 million and $36.1 million, respectively, was payable to the Adviser relating to management fees.
Incentive Fees
The incentive fees consist of two components that are determined independently of each other, with the result that one component may be payable even if the other is not. One component is based on income and the other component is based on capital gains, each as described below:
(i) Income Based Incentive Fee:
The first part of the incentive fee, an income based incentive fee, is calculated and payable quarterly in arrears based on the Company’s Pre-Incentive Fee Net Investment Income Returns. “Pre-Incentive Fee Net Investment Income Returns” means, as the context requires, either the dollar value of, or percentage rate of return on the value of the Company’s net assets at the end of the immediately preceding quarter from, interest income, dividend income and any other income (including any other fees (other than fees for providing managerial assistance), such as commitment, origination, structuring, diligence and consulting fees or other fees that the Company receives from portfolio companies) accrued during the calendar quarter, minus the Company’s operating expenses accrued for the quarter (including the management fee, expenses payable under the Administration Agreement, and any interest expense or fees on any credit facilities or outstanding debt and dividends paid on any issued and outstanding preferred shares, but excluding the incentive fee).
Pre-Incentive Fee Net Investment Income Returns includes, in the case of investments with a deferred interest feature (such as original issue discount, debt instruments with PIK interest and zero-coupon securities), accrued income that the Company has not yet received in cash. Pre-incentive fee net investment income excludes any realized capital gains, realized capital losses or unrealized capital appreciation or depreciation. The Company excludes the impact of expense support payments and recoupments from pre-incentive fee net investment income. Shareholders may be charged a fee on an income amount that is higher than the income they may ultimately receive.
Pre-Incentive Fee Net Investment Income Returns, expressed as a rate of return on the value of the Company’s net assets at the end of the immediately preceding quarter, is compared to a “hurdle rate” of return of 1.5% per quarter (6.0% annualized).
Pursuant to the Investment Advisory Agreement, the Company is required to pay an income based incentive fee of 17.5%, with a 1.5% hurdle and 100% catch-up.
The Company pays the Adviser an income based incentive fee based on its aggregate pre-incentive fee net investment income, as adjusted as described above, from the calendar quarter then ending and the eleven preceding calendar quarters (such period, the “Trailing Twelve Quarters”).
The hurdle amount for the income based incentive fee is determined on a quarterly basis and is equal to 1.5% multiplied by the Company’s NAV at the beginning of each applicable calendar quarter comprising the relevant Trailing Twelve Quarters. The hurdle amount is calculated after making appropriate adjustments for issuances by the Company of Common Shares, including issuances pursuant to its dividend reinvestment plan (the “DRIP”) and distributions that occurred during the relevant Trailing Twelve Quarters. The income based incentive fee for any partial period will be appropriately prorated.
For the income based incentive fee, the Company will pay the Adviser a quarterly incentive fee based on the amount by which (A) aggregate pre-incentive fee net investment income in respect of the relevant Trailing Twelve Quarters exceeds (B) the hurdle amount for such Trailing Twelve Quarters. The amount of the excess of (A) over (B) described in this paragraph for such Trailing Twelve Quarters is referred to as the “Excess Income Amount.”
The income based incentive fee for each quarter will be determined as follows:
•No income based incentive fee is payable to the Adviser for any calendar quarter for which there is no Excess Income Amount.
•The Adviser will be paid 100% of the pre-incentive fee net investment income in respect of the Trailing Twelve Quarters, if any, that exceeds the hurdle amount for such Trailing Twelve Quarters, but is less than or equal to an amount, which we refer to as the “Catch-up Amount,” determined as the sum of 1.82% (7.27% annualized), multiplied by the Company’s NAV at the beginning of each applicable calendar quarter comprising the relevant Trailing Twelve Quarters that is included in the calculation of the incentive fee based on income.
•The Adviser will be paid 17.5%, of the pre-incentive fee net investment income in respect of the Trailing Twelve Quarters that exceeds the Catch-up Amount.
The amount of the income based incentive fee that will be paid to the Adviser for a particular quarter will equal the excess of (a) the income based incentive fee so calculated over (b) the aggregate income based incentive fee that was paid in respect of the first eleven calendar quarters included in the relevant Trailing Twelve Quarters subject to the Incentive Fee Cap as described below.
The income based incentive fee that will be paid to the Adviser for a particular quarter is subject to a cap (the “Incentive Fee Cap”). The Incentive Fee Cap for any quarter is an amount equal to (a) 17.5% of the Cumulative Net Return (as defined below) during the relevant Trailing Twelve Quarters minus (b) the aggregate income based incentive fee that was paid in respect of the first eleven calendar quarters (or the portion thereof) included in the relevant Trailing Twelve Quarters.
“Cumulative Net Return” means (x) the pre-incentive fee net investment income in respect of the relevant Trailing Twelve Quarters minus (y) any Net Capital Loss (as defined below), if any, in respect of the relevant Trailing Twelve Quarters. If, in any quarter, the Incentive Fee Cap is zero or a negative value, the Company will pay no income based incentive fee to the Adviser for such quarter. If, in any quarter, the Incentive Fee Cap for such quarter is a positive value but is less than the income based incentive fee that is payable to the Adviser for such quarter (before giving effect to the Incentive Fee Cap) calculated as described above, the Company will pay an income based incentive fee to the Adviser equal to the Incentive Fee Cap for such quarter. If, in any quarter, the Incentive Fee Cap for such quarter is equal to or greater than the income based incentive fee that is payable to the Adviser for such quarter (before giving effect to the Incentive Fee Cap) calculated as described above, the Company will pay an income based incentive fee to the Adviser equal to the incentive fee calculated as described above for such quarter without regard to the Incentive Fee Cap.
“Net Capital Loss” in respect of a particular period means the difference, if positive, between (i) aggregate capital losses, whether realized or unrealized, in such period and (ii) aggregate capital gains, whether realized or unrealized, in such period.
These calculations are prorated for any period of less than three months and adjusted for any share issuances or repurchases during the relevant quarter. As the consummation of the IPO occurred on a date other than the first day of a calendar quarter, the income based incentive fee with respect to the Company’s pre-incentive fee net investment income was calculated for such calendar quarter at a weighted rate calculated based on the fee rates applicable before and after the consummation of the IPO based on the number of days in such calendar quarter before and after the consummation of the IPO. In no event will the amendments to the income based incentive fee include the Incentive Fee Cap and allow the Adviser to receive greater cumulative income based incentive fees under the Investment Advisory Agreement than it would have under the Original Investment Advisory Agreement. Amounts waived by the Prior Adviser are not subject to recoupment by the Prior Adviser.
For the three months ended March 31, 2026 and 2025, the Company accrued income based incentive fees of $2.3 million and $34.3 million, respectively.
As of March 31, 2026 and December 31, 2025, there was $2.3 million and $26.4 million, respectively, payable to the Adviser for income based incentive fees.
(ii) Capital Gains Based Incentive Fee:
Starting from the completion of the IPO, the second part of the incentive fee, a capital gains based incentive fee, is determined and payable in arrears as of the end of each calendar year in an amount equal to 17.5% of realized capital gains, if any, on a cumulative basis from inception through the end of each calendar year, computed net of all realized capital losses and unrealized capital depreciation on a cumulative basis, less the aggregate amount of any previously paid capital gains based incentive fees as calculated in accordance with GAAP.
The Company will accrue, but will not pay, a capital gains based incentive fee with respect to unrealized appreciation because a capital gains based incentive fee would be owed to the Adviser if the Company were to sell the relevant investment and realize a capital gain. Amounts waived by the Adviser or Prior Adviser are not subject to recoupment by the Adviser or Prior Adviser, as applicable.
For the three months ended March 31, 2026 and 2025, the Company accrued no capital gains based incentive fees. As of March 31, 2026 and December 31, 2025, no amount was payable to the Adviser for capital gains based incentive fees.
Administration Agreements
On October 1, 2018, the Company entered into the original Administration Agreement with the Prior Administrator (the “Prior Administration Agreement”). On November 7, 2024, the Board approved the termination of the Prior Administration Agreement, effective December 31, 2024, and the entry into the Administration Agreement between the Company and the Administrator, effective January 1, 2025. Accordingly, effective January 1, 2025, the Administrator became the Company’s administrator pursuant to the Administration Agreement. Further, on November 7, 2024, the Board approved the Sub-Administration Agreement between the Administrator, on behalf of the Company, and the Sub-Administrator. Accordingly, effective January 1, 2025, the Sub-Administrator became one of the Company’s sub-administrators pursuant to the Sub-Administration Agreement. To acknowledge the change of the administrator, the Board also approved the assignment of the third party sub-administration agreement (the “State Street Sub-Administration Agreement”) with State Street Bank and Trust Company (the “State Street Sub-Administrator”) from the Prior Administrator to the Administrator, effective January 1, 2025. These changes did not result in any change in the aggregate fees paid by the Company. Further, the nature and level of services provided to the Company remain the same, as well as the personnel that provide administrative services to the Company on behalf of the Administrators.
Under the terms of the Administration Agreements, the Administrators provide, or oversee the performance of, administrative and compliance services, including, but not limited to, maintaining financial records, overseeing the calculation of NAV, compliance monitoring (including diligence and oversight of the Company’s other service providers), preparing reports to shareholders and reports filed with the SEC, preparing materials and coordinating meetings of the Board, managing the payment of expenses, the payment and receipt of funds for investments and the performance of administrative and professional services rendered by others and providing office space, equipment and office services. The Administrator may also offer to provide, on the Company’s behalf, managerial assistance to the Company’s portfolio companies. The initial term of the Prior Administration Agreement was two years from October 1, 2018. Unless earlier terminated, the Administration Agreements will renew automatically for successive annual periods, provided that such continuance is approved at least annually by (i) the vote of the Board or by a majority vote of the outstanding voting securities of the Company and (ii) the vote of a majority of the Independent Trustees. The Administration Agreements were most recently renewed and approved by the Board, including a majority of the Independent Trustees, on April 29, 2026, for an additional annual period, and, unless terminated earlier, will renew automatically from year to year thereafter if approved annually by a majority of the Board or by the holders of a majority of the Company’s outstanding voting securities and, in each case, a majority of the Independent Trustees.
For providing these services, the Company will reimburse the Administrator for the costs, expenses and allocable portion of overhead (including rent, office equipment and utilities) and other expenses incurred by the Administrators in performing their administrative obligations under the Administration Agreements, including but not limited to: (i) the Company’s chief compliance officer, chief financial officer and their respective staffs; (ii) investor relations, legal, operations and other non-investment professionals (including information technology professionals) at the Administrators that perform duties for the Company; and (iii) any internal audit group personnel of Blackstone or any of its affiliates. The Administrator and the Prior Administrator have not historically, and the Administrator does not currently, calculate the amount of rent and other occupancy costs allocable to the Company, and the Administrator and the Prior Administrator have not indicated an intention to seek reimbursement from the Company for such costs. Thus, the Administrator and the Prior Administrator, as applicable, have waived their rights to any reimbursement for rent and other occupancy costs for prior periods, including for the three months ended March 31, 2026 and 2025. The Administrator and the Prior Administrator cannot recoup any expenses that they have previously waived. However, in future periods, the Administrator may choose to establish an allocation methodology to calculate these costs and seek reimbursement from the Company, in which case the Company will accrue and reimburse the Administrator for such costs for that period.
For the three months ended March 31, 2026 and 2025, the Company incurred $1.1 million and $1.0 million, respectively, in expenses under the Administration Agreement, which were recorded in Administrative service expenses in the Company’s Condensed Consolidated Statements of Operations.
As of March 31, 2026 and December 31, 2025, $1.0 million and $1.6 million, respectively, was unpaid and included in Due to affiliates in the Condensed Consolidated Statements of Assets and Liabilities.
Sub-Administration and Custody Agreement
On October 1, 2018, the Prior Administrator entered into the State Street Sub-Administration Agreement with the State Street Sub-Administrator under which the State Street Sub-Administrator provides various accounting and administrative services to the Company. The State Street Sub-Administrator also serves as the Company’s custodian. On November 7, 2024, the Board approved the assignment of the State Street Sub-Administration Agreement from the Prior Administrator to the Administrator, effective January 1, 2025. The initial term of the State Street Sub-Administration Agreement was two years from the effective date and after expiration of the initial term and the State Street Sub-Administration Agreement shall automatically renew for successive one-year periods, unless a written notice of non-renewal is delivered prior to 120 days prior to the expiration of the initial term or renewal term.
v3.26.1
Investments
 3 Months Ended
Mar. 31, 2026
Schedule of Investments [Abstract]  
Investments Investments
The composition of the Company’s investment portfolio at cost and fair value was as follows:
March 31, 2026December 31, 2025
CostFair Value% of Total Investments at Fair ValueCostFair Value% of Total Investments at Fair Value
First lien debt$13,973,977 $13,609,017 97.6 %$14,066,122 $13,866,434 97.6 %
Second lien debt233,536 228,827 1.6 232,448 231,650 1.6 
Unsecured debt13,992 12,502 0.1 13,049 12,278 0.1 
Equity75,416 91,794 0.7 76,348 96,932 0.7 
Total$14,296,921 $13,942,140 100.0 %$14,387,967 $14,207,294 100.0 %
The Company utilizes the Global Industry Classification Standard for categorizing the industry classification of its investments. The industry composition of investments at fair value was as follows:
March 31, 2026December 31, 2025
Aerospace & Defense4.2 %4.1 %
Air Freight & Logistics1.2 1.9 
Automobile Components (2)
— 0.0 
March 31, 2026December 31, 2025
Biotechnology1.1 %1.1 %
Building Products1.4 1.3 
Chemicals0.3 0.3 
Commercial Services & Supplies8.2 8.0 
Construction & Engineering1.4 1.2 
Consumer Staples Distribution & Retail (1)(2)
0.0 0.0 
Containers & Packaging0.2 0.2 
Distributors1.9 2.1 
Diversified Consumer Services4.2 4.2 
Diversified Telecommunication Services0.1 0.1 
Electric Utilities1.5 1.4 
Electrical Equipment1.4 1.4 
Electronic Equipment, Instruments & Components2.2 2.1 
Energy Equipment & Services0.2 0.2 
Financial Services0.5 0.4 
Ground Transportation0.1 0.1 
Health Care Equipment & Supplies0.4 0.4 
Health Care Providers & Services9.7 9.5 
Health Care Technology4.4 5.6 
Insurance9.3 9.3 
Interactive Media & Services0.7 0.3 
IT Services4.3 4.3 
Life Sciences Tools & Services0.9 0.8 
Machinery0.3 0.3 
Marine Transportation0.5 0.4 
Media0.5 0.6 
Oil, Gas & Consumable Fuels0.5 0.5 
Paper & Forest Products0.1 0.1 
Pharmaceuticals0.4 0.4 
Professional Services9.9 9.7 
Real Estate Management & Development1.5 1.4 
Software20.7 20.5 
Specialty Retail1.3 1.3 
Technology Hardware, Storage & Peripherals0.5 0.6 
Trading Companies & Distributors0.8 0.9 
Transportation Infrastructure3.0 2.9 
Wireless Telecommunication Services0.2 0.1 
Total100.0 %100.0 %
(1)Amount rounds to less than 0.1% as of March 31, 2026.
(2)Amount rounds to less than 0.1% as of December 31, 2025.
The geographic composition of investments at cost and fair value was as follows:
March 31, 2026
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$12,300,117 $11,919,845 85.5 %195.4 %
Europe1,687,271 1,710,103 12.2 28.1 
Canada149,780 151,492 1.1 2.5 
Bermuda/Cayman Islands147,876 148,611 1.1 2.4 
Asia11,877 12,089 0.1 0.2 
Total$14,296,921 $13,942,140 100.0 %228.6 %
December 31, 2025
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$12,488,551 $12,259,789 86.3 %196.3 %
Europe1,601,031 1,645,999 11.6 26.3 
Bermuda/Cayman Islands148,220 148,966 1.0 2.4 
Canada138,265 140,444 1.0 2.3 
Asia11,900 12,096 0.1 0.2 
Total$14,387,967 $14,207,294 100.0 %227.5 %
As of March 31, 2026 and December 31, 2025, eight borrowers (across thirteen loans) and five borrowers (eight loans) in the portfolio were on non-accrual status, respectively.
As of March 31, 2026 and December 31, 2025, on a fair value basis, 99.5% and 99.6%, respectively, of performing debt investments bore interest at a floating rate and 0.5% and 0.4%, respectively, of performing debt investments bore interest at a fixed rate.
v3.26.1
Fair Value Measurements
 3 Months Ended
Mar. 31, 2026
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present the fair value hierarchy of financial instruments:
March 31, 2026
Level 1Level 2Level 3Total
First lien debt$— $199,598 $13,409,419 $13,609,017 
Second lien debt— — 228,827 228,827 
Unsecured debt— — 12,502 12,502 
Equity405 — 91,389 91,794 
Total$405 $199,598 $13,742,137 $13,942,140 
December 31, 2025
Level 1Level 2Level 3Total
First lien debt$— $106,617 $13,759,817 $13,866,434 
Second lien debt— — 231,650 231,650 
Unsecured debt— — 12,278 12,278 
Equity438 — 96,494 96,932 
Total$438 $106,617 $14,100,239 $14,207,294 
Within Investments at fair value, substantially all Equity investments are illiquid and privately negotiated in nature and are subject to contractual sale constraints or other restrictions pursuant to their respective governing or similar agreements. Approximately $5.8 million of such Equity investments have a sale constraint or other restriction that will lapse after a predetermined date; the weighted average remaining duration of such restrictions is 3.9 years
The following tables present changes in the fair value of financial instruments for which Level 3 inputs were used to determine the fair value:
Three Months Ended March 31, 2026
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal
Fair value, beginning of period$13,759,817 $231,650 $12,278 $96,494 $14,100,239 
Purchases of investments343,921 2,468 934 2 347,325 
Proceeds from principal repayments and sales of investments(445,638)(1,500)— (1,857)(448,995)
Accretion of discount (amortization of premium)10,912 120 9 — 11,041 
Net realized gain (loss)130 — — 924 1,054 
Net change in unrealized appreciation (depreciation)(163,340)(3,911)(719)(4,174)(172,144)
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
(96,383)— — — (96,383)
Fair value, end of period$13,409,419 $228,827 $12,502 $91,389 $13,742,137 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of March 31, 2026 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$(162,672)$(3,911)$(719)$(3,565)$(170,867)
Three Months Ended March 31, 2025
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal
Fair value, beginning of period$12,714,636 $119,184 $33,521 $109,424 $12,976,765 
Purchases of investments715,298 1,663 468 168 717,597 
Proceeds from principal repayments and sales of investments(964,827)(2,347)(20,595)(10,224)(997,993)
Accretion of discount (amortization of premium)16,001 74 10 — 16,085 
Net realized gain (loss)1,210 (1)— 7,316 8,525 
Net change in unrealized appreciation (depreciation)(9,399)(91)254 (7,521)(16,757)
Transfers into Level 3 (1)
225 — — — 225 
Transfers out of Level 3 (1)
(102,175)— — — (102,175)
Fair value, end of period$12,370,969 $118,482 $13,658 $99,163 $12,602,272 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of March 31, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$(5,329)$(91)$(16)$(2,969)$(8,405)
For the three months ended March 31, 2026 and 2025, transfers into or out of Level 3 were primarily due to decreased or increased price transparency.
The following tables present quantitative information about the significant unobservable inputs of the Company’s Level 3 financial instruments. These tables are not intended to be all-inclusive but instead capture the significant unobservable inputs relevant to the Company’s determination of fair value.
March 31, 2026
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$13,129,390 Yield AnalysisDiscount Rate7.14 %22.06 %9.75 %
272,530 Asset RecoverabilityMarket Multiple5.00x12.50x8.80x
7,499 Market QuotationsBroker quoted price92.89100.2598.17
13,409,419 
Investments in second lien debt228,827 Yield AnalysisDiscount Rate8.64 %15.84 %10.24 %
Investments in unsecured debt12,502 Yield AnalysisDiscount Rate16.10 %16.10 %16.10 %
Investments in equity58,543 Market ApproachPerformance Multiple6.00x33.63x11.96x
19,562 Yield AnalysisDiscount Rate11.67 %21.71 %16.69 %
11,434 Option Pricing Model Expected Volatility32.00 %70.50 %33.51 %
1,850 Asset RecoverabilityMarket Multiple8.50x16.00x11.90x
91,389 
Total$13,742,137 
December 31, 2025
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$13,198,498 Yield AnalysisDiscount Rate6.94 %19.36 %9.44 %
462,825 Asset RecoverabilityMarket Multiple7.25x12.47x11.23x
98,494 Market QuotationsBroker quoted price97.25100.0099.97
13,759,817 
Investments in second lien debt231,650 Yield AnalysisDiscount Rate8.45 %15.78 %10.11 %
Investments in unsecured debt12,278 Yield AnalysisDiscount Rate15.10 %15.10 %15.10 %
Investments in equity62,579 Market ApproachPerformance Multiple6.40x33.63x12.28x
19,678 Yield AnalysisDiscount Rate12.50 %19.50 %15.08 %
11,235 Option Pricing ModelExpected Volatility32.00 %70.50 %33.34 %
3,002 Asset RecoverabilityMarket Multiple8.50x16.00x11.22x
96,494 
Total$14,100,239 
(1)Weighted averages are calculated based on fair value of investments.
The significant unobservable input used in the yield analysis is the discount rate based on comparable market yields. Significant increases in discount rates would result in a significantly lower fair value measurement. The significant unobservable input used for market quotations are broker quoted prices provided by independent pricing services. The significant unobservable input used under the market approach is the Performance Multiple. The significant unobservable inputs used under the asset recoverability approach are the market multiple and discount rate. Significant decreases in quoted prices, Performance Multiples, or market multiples would result in a significantly lower fair value measurement. The significant input used in the option pricing model is expected volatility. Significant increases or decreases in expected volatility could result in a significantly higher or significantly lower fair market value measurement, respectively.
Financial Instruments Not Carried at Fair Value
Debt
The fair value of the Company’s SPV Financing Facilities (as defined in Note 7) and Revolving Credit Facility (as defined in Note 7), as of March 31, 2026 and December 31, 2025, approximates their carrying value as the credit facilities have variable interest based on selected short-term rates. These financial instruments would be categorized as Level 3 within the fair value hierarchy.
The following table presents the fair value measurements of the Company’s Unsecured Notes and Debt Securitization Notes (as defined in Note 7) had they been accounted for at fair value. These financial instruments would be categorized as Level 3 within the fair value hierarchy as of March 31, 2026 and December 31, 2025.
March 31, 2026December 31, 2025
Fair ValueFair Value
2026 Notes$— $799,357 
New 2026 Notes690,577 691,950 
2027 Notes631,721 632,710 
March 31, 2026December 31, 2025
Fair ValueFair Value
2028 Notes$604,234 $615,550 
November 2027 Notes401,157 408,680 
April 2028 Notes695,121 706,370 
June 2030 Notes484,410 497,550 
January 2031 Notes479,447 494,000 
September 2029 Notes391,905 — 
2024-1 Notes457,456 457,450 
Total$4,836,028 $5,303,617 
Other
As of March 31, 2026 and December 31, 2025, the carrying amounts of the Company’s other assets and liabilities approximate fair value. These financial instruments, with the exception of cash and cash equivalents (including money market funds classified within Cash and Cash Equivalents in the Condensed Consolidated Statements of Assets and Liabilities) which would be categorized as Level 1, would be categorized as Level 3 within the fair value hierarchy.
v3.26.1
Derivatives
 3 Months Ended
Mar. 31, 2026
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivatives Derivatives
The Company enters into derivative financial instruments in the normal course of business to achieve certain risk management objectives, including managing its foreign currency and interest rate risk exposures.
The net fair value of foreign currency and interest rate derivative contracts are included within Derivative assets at fair value or Derivative liabilities at fair value in the Condensed Consolidated Statements of Assets and Liabilities.
The following tables present the aggregate notional amount and fair value hierarchy of the Company’s derivative financial instruments as of March 31, 2026 and December 31, 2025:
March 31, 2026
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $2,252 $— $2,252 $231,878 
Interest rate swaps— 29,016 — 29,016 1,600,000 
Total Derivative assets at fair value$— $31,268 $— $31,268 $1,831,878 
Derivative Liabilities
Foreign currency forward contracts$— $— $— $— $— 
Interest rate swaps— (8,723)— (8,723)900,000 
Total Derivative liabilities at fair value$— $(8,723)$— $(8,723)$900,000 
Cash collateral posted$1,821 
December 31, 2025
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $137 $— $137 $78,873 
Interest rate swaps— 22,207 — 22,207 1,600,000 
Total Derivative assets at fair value$— $22,344 $— $22,344 $1,678,873 
Derivative Liabilities
Foreign currency forward contracts$— $(822)$— $(822)$143,979 
Interest rate swaps— (1,889)— (1,889)500,000 
Total Derivative liabilities at fair value$— $(2,711)$— $(2,711)$643,979 
Cash collateral posted$11,286 
In the tables above:
•The notional amount represents the absolute value amount of all outstanding derivative contracts.
•All foreign currency derivatives are not designated in hedge relationships.
•All interest rate swaps are designated in fair value hedge relationships.
•The fair value has been presented prior to the application of counterparty netting or cash collateral netting.
The table below presents the impact to the Condensed Consolidated Statements of Operations from derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship for the three months ended March 31, 2026 and March 31, 2025, respectively. The net change in unrealized gains and losses on the derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship are included within Net change in unrealized appreciation (depreciation) on derivative instruments in the Condensed Consolidated Statements of Operations. The net realized gains and losses on the derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship are included within Net realized gain (loss) on derivative instruments in the Condensed Consolidated Statements of Operations.
For the Three Months Ended March 31,
20262025
Unrealized appreciation (depreciation)
Foreign currency forward contracts$2,943 $(1,921)
Net change in unrealized appreciation (depreciation)$2,943 $(1,921)
Realized gain (loss)
Foreign currency forward contracts$1,842 $(2,055)
Net realized gain (loss)$1,842 $(2,055)
Offsetting of Derivative Instruments
The Company has elected to offset cash collateral posted to or received from its counterparty against the net fair value of derivative instruments with that counterparty. The following tables present the offsetting of the Company’s derivative financial instruments as of March 31, 2026 and December 31, 2025:
As of March 31, 2026
CounterpartyDerivative Assets Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Asset
Cash Collateral Received (1)
Cash Collateral Received Not Offset (2)
SMBC Capital Markets, Inc.$11,205 $— $— $11,205 $— $— 
Wells Fargo Bank, N.A.20,063 (8,723)— 11,340 — — 
$31,268 $(8,723)$— $22,545 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,821 $1,821 
Wells Fargo Bank, N.A.(8,723)8,723 — — — — 
$(8,723)$8,723 $— $— $1,821 $1,821 
As of December 31, 2025
CounterpartyDerivative Assets Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Asset
Cash Collateral Received (1)
Cash Collateral Received Not Offset (2)
SMBC Capital Markets, Inc.$8,251 $— $— $8,251 $— $— 
Wells Fargo Bank, N.A.14,093 (2,711)— 11,382 — — 
$22,344 $(2,711)$— $19,633 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,805 $1,805 
Wells Fargo Bank, N.A.(2,711)2,711 — — 9,481 9,481 
$(2,711)$2,711 $— $— $11,286 $11,286 
(1)No non-cash collateral has been posted to or received from counterparties related to derivative assets or derivative liabilities.
(2)Cash collateral posted to or received from counterparties has been offset against the derivative position with those counterparties to the extent an amount is available to be offset. Cash collateral posted to or received from counterparties in excess of the net derivative positions and not offset is recorded in the Condensed Consolidated Statements of Assets and Liabilities as Receivable from Broker or Payable to Broker, respectively.
Hedging
The Company designated certain interest rate swaps as the hedging instrument in a qualifying fair value hedge accounting relationship.
The table below presents the impact to the Condensed Consolidated Statements of Operations from derivative assets and liabilities designated in a qualifying hedge accounting relationship for the three months ended March 31, 2026 and March 31, 2025, respectively.
For derivative instruments designated in qualifying hedge relationships, the change in fair value of the hedging instrument and hedged item is recorded in Interest expense and recognized as components of Interest expense in the Condensed Consolidated Statements of Operations.
For the Three Months Ended March 31,
20262025
Interest rate swaps$(18,839)$15,409 
Hedged items$19,498 $(14,285)
The table below presents the carrying value of unsecured borrowings as of March 31, 2026 and December 31, 2025 that are designated in a qualifying hedging relationship and the related cumulative hedging adjustment (increase/(decrease)) from current and prior hedging relationships included in such carrying values:
March 31, 2026December 31, 2025
DescriptionCarrying ValueCumulative Hedging AdjustmentsCarrying ValueCumulative Hedging Adjustments
Unsecured notes$2,468,160 $(90)$2,091,290 $19,408 
v3.26.1
Borrowings
 3 Months Ended
Mar. 31, 2026
Debt Disclosure [Abstract]  
Borrowings Borrowings
In accordance with the 1940 Act, with certain limitations, the Company is allowed to borrow amounts such that its asset coverage, as defined in the 1940 Act, is at least 150% after such borrowing. On September 25, 2018, the Company’s sole initial shareholder approved the adoption of this 150% threshold pursuant to Section 61(a)(2) of the 1940 Act. As of March 31, 2026 and December 31, 2025, the Company’s asset coverage was 175.5% and 177.1%, respectively.
SPV Financing Facilities
The following wholly-owned subsidiaries of the Company have entered into secured financing facilities, as described below: Jackson Hole Funding, Breckenridge Funding, Big Sky Funding, and BXSL CLO 2025-1 (collectively the “SPVs,” and such secured financing facilities described below collectively the “SPV Financing Facilities.”).
The obligations of each SPV to the lenders under the applicable SPV Financing Facility are secured by a first priority security interest in all of the applicable SPV’s portfolio investments and cash. The obligations of each SPV under the applicable SPV Financing Facility are non-recourse to the Company, and the Company’s exposure to the credit facility is limited to the value of its investment in the applicable SPV.
In connection with the SPV Financing Facilities, the applicable SPV has made certain customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar facilities. Each SPV Financing Facility contains customary events of default for similar financing transactions, including if a change of control of the applicable SPV occurs. Upon the occurrence and during the continuation of an event of default, the lenders under the applicable SPV Financing Facility may declare the outstanding advances and all other obligations under the applicable SPV Financing Facility immediately due and payable. The occurrence of an event of default triggers a requirement that the applicable SPV obtain the consent of the lenders under the applicable SPV Financing Facility prior to entering into any sale or disposition with respect to portfolio investments.
As of March 31, 2026 and December 31, 2025, the Company was in compliance with all covenants and other requirements of each of the SPV Financing Facilities.
Jackson Hole Funding Facility
On November 16, 2018, Jackson Hole Funding, the Company’s wholly-owned subsidiary that holds primarily originated loan investments, entered into a senior secured revolving credit facility (which was subsequently amended and restated on December 16, 2021, and amended effective as of September 16, 2022, November 15, 2023, December 18, 2023, December 19, 2024, November 26, 2025 and March 3, 2026, and as further amended from time to time, the “Jackson Hole Funding Facility”) with JPMorgan Chase Bank, National Association (“JPM”). JPM serves as administrative agent, Citibank, N.A., serves as collateral agent and securities intermediary, Virtus Group, LP serves as collateral administrator and the Company serves as portfolio manager under the Jackson Hole Funding Facility.
Prior to December 19, 2024, advances under the Jackson Hole Funding Facility bore interest at a per annum rate equal to the benchmark in effect for the currency of the applicable advances (which is the three-month term SOFR for dollar advances), plus the applicable margin of 2.375% per annum for certain foreign currency advances to 2.525% per annum for dollar advances. From and after December 19, 2024, advances under the Jackson Hole Funding Facility bear interest at a per annum rate equal to the benchmark in effect for the currency of the applicable advances (which is the three-month Term SOFR for dollar advances), plus the applicable margin of 1.95% per annum for all advances. Jackson Hole Funding is required to utilize a minimum percentage of 75% of the financing commitments. Unused amounts below such minimum utilization amount accrue a fee at a rate of, prior to December 19, 2024, 1.775% per annum, and from and after December 19, 2024, 1.50% per annum. In addition, Jackson Hole Funding pays a commitment fee of 0.48% per annum on the average daily unused amount of the financing commitments in excess of the minimum utilization amount until May 2, 2026. Jackson Hole Funding also pays to JPM an administrative agency fee, in addition to certain other fees, each as agreed between Jackson Hole Funding and JPM.
The maximum commitment amount of the Jackson Hole Funding Facility as of March 31, 2026 was $500.0 million. The Jackson Hole Funding Facility has an accordion feature, subject to the satisfaction of various conditions, which could bring total commitments under the Jackson Hole Funding Facility to up to $900.0 million. Proceeds from borrowings under the Jackson Hole Funding Facility may be used to fund portfolio investments by Jackson Hole Funding and to make advances under delayed draw term loans where Jackson Hole Funding is a lender. The period during which Jackson Hole Funding may make borrowings under the Jackson Hole Funding Facility expires on May 2, 2026 and the Jackson Hole Funding Facility is scheduled to mature on May 17, 2027.
Breckenridge Funding Facility
On December 21, 2018, Breckenridge Funding, the Company’s wholly-owned subsidiary that holds primarily syndicated loan investments, entered into a senior secured revolving credit facility (which was subsequently amended on June 11, 2019, August 2, 2019, September 27, 2019, April 13, 2020, October 5, 2021, February 28, 2022, May 19, 2022, November 1, 2023, January 17, 2024, and December 18, 2024, and as further amended from time to time, the “Breckenridge Funding Facility”) with BNP Paribas (“BNP”). BNP serves as administrative agent, Wells Fargo Bank, National Association (“Wells Fargo”) serves as collateral agent and the Company serves as servicer under the Breckenridge Funding Facility.
Prior to December 18, 2024, advances under the Breckenridge Funding Facility bore interest at a per annum rate equal to the three-month Term SOFR (or other base rate) in effect, plus an applicable margin of 1.70%, 2.05% or 2.30% per annum, as applicable, depending on the nature of the advances being requested under the facility. Effective December 18, 2024, advances under the Breckenridge Funding Facility bear interest at a per annum rate equal to the three-month Term SOFR (or other base rate) in effect, plus an applicable margin of 1.90% per annum for all advances. From and after June 17, 2027, the applicable margin for advances under the Breckenridge Funding Facility will increase to 2.40% per annum. Breckenridge Funding pays a commitment fee of 0.70% per annum if the unused facility amount is greater than 50% or 0.35% per annum if the unused facility amount is less than or equal to 50% and greater than 25%, based on the average daily unused amount of the financing commitments until June 18, 2027, in addition to certain other fees as agreed between Breckenridge Funding and BNP.
Proceeds from borrowings under the Breckenridge Funding Facility may be used to fund portfolio investments by Breckenridge Funding and to make advances under delayed draw and revolving loans where Breckenridge Funding is a lender. The period during which Breckenridge Funding may make borrowings under the Breckenridge Funding Facility expires on June 18, 2027 and the Breckenridge Funding Facility is scheduled to mature on June 18, 2029.
Big Sky Funding Facility
On December 10, 2019, Big Sky Funding, the Company’s wholly-owned subsidiary, entered into a senior secured revolving credit facility (which was subsequently amended on December 30, 2020, September 30, 2021, amended and restated on June 29, 2022, amended on March 30, 2023, amended on June 25, 2024, amended on September 25, 2024, amended on November 20, 2024, and as further amended from time to time, the “Big Sky Funding Facility”) with Bank of America, N.A. (“Bank of America”). Bank of America serves as administrative agent, Wells Fargo serves as collateral administrator and the Company serves as manager under the Big Sky Funding Facility.
Advances under the Big Sky Funding Facility bear interest at a per annum rate equal to the one-month Term SOFR in effect, plus the applicable margin of (a) until September 25, 2024, 1.80% per annum, (b) from September 25, 2024 to November 19, 2024, a range between 1.50% and 1.95% per annum depending on the nature of the collateral securing the advances, subject to a floor of 1.80% per annum, and (c) from and after November 20, 2024, 1.85% per annum. Big Sky Funding is required to utilize a minimum percentage of 80% of the financing commitments. Unused amounts below such minimum utilization amount accrue a fee at a rate of 1.60% per annum. In addition, Big Sky Funding pays an unused fee of 0.45% per annum on the daily unused amount of the financing commitments in excess of the minimum utilization amount, commencing three months after the closing date of the Big Sky Funding Facility, in addition to certain other fees as agreed between Big Sky Funding and Bank of America.
The maximum commitment amount of the Big Sky Funding Facility as of March 31, 2026 was $650.0 million. The Big Sky Funding Facility has an accordion feature, subject to the satisfaction of various conditions, which could bring total commitments under the Big Sky Funding Facility to up to $800.0 million. Proceeds from borrowings under the Big Sky Funding Facility may be used to fund portfolio investments by Big Sky Funding and to make advances under revolving loans or delayed draw term loans where Big Sky Funding is a lender. The period during which Big Sky Funding may make borrowings under the Big Sky Funding Facility expires on March 30, 2027 and the Big Sky Funding Facility is scheduled to mature on September 30, 2027.
BXSL 2025-1 Facility
On December 27, 2024, BXSL CLO 2025-1, the Company’s wholly-owned subsidiary created to hold primarily private credit loan investments, entered into a senior secured credit facility (as amended from time to time, the “BXSL 2025-1 Facility”) with BNP. BNP serves as administrative agent, Wilmington Trust, National Association (“Wilmington Trust”) serves as collateral custodian and the Company serves as collateral manager under the BXSL 2025-1 Facility.
Advances under the BXSL 2025-1 Facility bear interest at a per annum rate equal to the three-month Term SOFR (or other base rate) in effect, plus an applicable margin of 1.65% per annum for all advances. From and after December 27, 2026, the applicable margin for advances under the BXSL 2025-1 Facility will increase to 2.15% per annum.
Proceeds from borrowings under the BXSL 2025-1 Facility may be used to fund portfolio investments by BXSL 2025-1 Facility and to make advances under corporate loans where BXSL CLO 2025-1 is a lender. The period during which BXSL 2025-1 Facility may make borrowings under the BXSL 2025-1 Facility expires on December 27, 2026, and the BXSL 2025-1 Facility is scheduled to mature on December 27, 2028.
Revolving Credit Facility
On June 15, 2020, the Company entered into a senior secured revolving credit facility (which was most recently amended on August 4, 2025, and as further amended from time to time, the “Revolving Credit Facility”) with Citibank, N.A. (“Citi”) serving as administrative agent and collateral agent.
The Revolving Credit Facility provides for borrowings in USD and certain agreed-upon foreign currencies. Borrowings under the Revolving Credit Facility are subject to compliance with a borrowing base. As of March 31, 2026, a portion of the Revolving Credit Facility consists of (A) funded term loans in the aggregate principal amount of $433.5 million and (B) revolving commitments in the aggregate principal amount of $2.1 billion and the Revolving Credit Facility provides for the issuance of letters of credit on behalf of the Company in an aggregate face amount not to exceed $175.0 million. Proceeds from the borrowings under the Revolving Credit Facility may be used for general corporate purposes of the Company and its subsidiaries in the ordinary course of business. Availability of the revolver under the Revolving Credit Facility will terminate on August 4, 2029 (other than with respect to the revolving commitments of certain lenders in the amount of $200.0 million, which expire on June 28, 2026) and all amounts outstanding under the Revolving Credit Facility must be repaid by August 5, 2030 (other than with respect to the revolving commitments of certain lenders in the amount of $200.0 million which mature on June 28, 2027) pursuant to an amortization schedule.
Loans under the Revolving Credit Facility with respect to revolving commitments of certain lenders in the amount of $200.0 million bear interest at a per annum rate equal to, (x) for loans for which the Company elects the base rate option, the “alternate base rate” (which is the greatest of (a) the prime rate as publicly announced by Citi, (b) the sum of (i) the weighted average of the rates on overnight federal funds transactions with members of the Federal Reserve System plus (ii) 0.5% and (c) one month adjusted Term SOFR plus 1% per annum) plus (A) if the gross borrowing base is equal to or greater than 1.6 times the combined revolving debt amount, 0.75%, or (B) if the gross borrowing base is less than 1.6 times the combined revolving debt amount, 0.875%, and (y) for all other loans, the applicable benchmark rate for the related interest period for such borrowing plus (A) if the gross borrowing base is equal to or greater than 1.6 times the combined revolving debt amount, 1.75%, or (B) if the gross borrowing base is less than 1.6 times the combined revolving debt amount, 1.875%. All other loans under the Revolving Credit Facility bear interest at a per annum rate equal to, (x) for loans for which the Company elects the base rate option, the “alternate base rate” (which is the greatest of (a) the prime rate as publicly announced by Citi, (b) the sum of (i) the weighted average of the rates on overnight federal funds transactions with members of the Federal Reserve System plus (ii) 0.5% and (c) one month adjusted Term SOFR plus 1% per annum) plus (A) if the gross borrowing base is equal to or greater than 2.0 times the combined revolving debt amount, 0.525%, (B) if the gross borrowing base is less than 2.0 times and is equal to or greater than 1.6 times the combined revolving debt amount, 0.650%, or (C) if the gross borrowing base is less than 1.6 times the combined revolving debt amount, 0.775%, and (y) for all other loans, the applicable benchmark rate for the related interest period for such borrowing plus (A) if the gross borrowing base is equal to or greater than 2.0 times the combined revolving debt amount, 1.525%, (B) if the gross borrowing base is less than 2.0 times and is equal to or greater than 1.6 times the combined revolving debt amount, 1.650%, or (C) if the gross borrowing base is less than 1.6 times the combined revolving debt amount, 1.775%. The Company will pay an unused fee of 0.325% per annum on the daily unused amount of the revolver commitments (other than with respect to the revolving commitments of certain lenders in the amount of $200.0 million, for which the Company pays an unused fee of 0.375%). The Company pays letter of credit participation fees and a fronting fee on the average daily amount of any lender’s exposure with respect to any letters of credit issued under the Revolving Credit Facility.
The Company’s obligations to the lenders under the Revolving Credit Facility are secured by a first priority security interest in substantially all of the Company’s assets.
In connection with the Revolving Credit Facility, the Company has made certain customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar facilities. In addition, the Company must comply with the following financial covenants: (a) the Company must maintain a minimum shareholders’ equity, measured as of each fiscal quarter-end; and (b) the Company must maintain at all times a 150% asset coverage ratio.
The Revolving Credit Facility contains customary events of default for similar financing transactions. Upon the occurrence and during the continuation of an event of default, Citi may terminate the commitments and declare the outstanding advances and all other obligations under the Revolving Credit Facility immediately due and payable.
As of March 31, 2026 and December 31, 2025, the Company was in compliance with all covenants and other requirements of the Revolving Credit Facility.
Unsecured Notes
The Company issued unsecured notes, as further described below: 2026 Notes, New 2026 Notes, 2027 Notes, 2028 Notes, November 2027 Notes, April 2028 Notes, June 2030 Notes, January 2031 Notes and September 2029 Notes (each as defined below) which are collectively referred to herein as the “Unsecured Notes.”
The Unsecured Notes contain certain covenants, including covenants requiring the Company to comply with the asset coverage requirements of Section 18(a)(1)(A) as modified by Section 61(a)(1) and (2) of the 1940 Act, whether or not it is subject to those requirements, and to provide financial information to the holders of the Unsecured Notes and U.S. Bank Trust Company, National Association (the “Trustee”) if the Company is no longer subject to the reporting requirements under the Exchange Act. These covenants are subject to important limitations and exceptions that are described in each respective indenture governing the Unsecured Notes (the “Unsecured Notes Indentures”).
In addition, on the occurrence of a “change of control repurchase event,” as defined in each respective Unsecured Notes Indenture, the Company will generally be required to make an offer to purchase the outstanding Unsecured Notes at a price equal to 100% of the principal amount of such Unsecured Notes plus accrued and unpaid interest to the repurchase date.
As of March 31, 2026 and December 31, 2025, the Company was in compliance with all covenants and other requirements of each of the Unsecured Notes.
2026 Notes
On October 23, 2020 and December 1, 2020, the Company issued $500.0 million aggregate principal amount and $300.0 million aggregate principal amount, respectively, of 3.625% notes due 2026 (the “2026 Notes”) pursuant to a supplemental indenture, dated as of October 23, 2020 (and together with the indenture, dated as of July 15, 2020 (the “Base Indenture”), the “2026 Notes Indenture”), to the Base Indenture between the Company and the Trustee.
The 2026 Notes matured on January 15, 2026, and were paid off consistent with the terms of the January 2026 Notes Indenture.
New 2026 Notes
On March 16, 2021 and April 27, 2021, the Company issued $400.0 million aggregate principal amount and $300.0 million aggregate principal amount, respectively, of 2.750% notes due 2026 (the “New 2026 Notes”) pursuant to a supplemental indenture, dated as of March 16, 2021 (and together with the Base Indenture, the “New 2026 Notes Indenture”), to the Base Indenture between the Company and the Trustee.
The New 2026 Notes will mature on September 16, 2026 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the New 2026 Notes Indenture. The New 2026 Notes bear interest at a rate of 2.750% per year payable semi-annually on March 16 and September 16 of each year, commencing on September 16, 2021. The New 2026 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the New 2026 Notes, rank pari passu with all existing and future unsecured unsubordinated indebtedness issued by the Company, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
2027 Notes
On July 23, 2021, the Company issued $650.0 million aggregate principal amount of 2.125% notes due 2027 (the “2027 Notes”) pursuant to a supplemental indenture, dated as of July 23, 2021 (and together with the Base Indenture, the “2027 Notes Indenture”), to the Base Indenture between the Company and the Trustee.
The 2027 Notes will mature on February 15, 2027 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the 2027 Notes Indenture. The 2027 Notes bear interest at a rate of 2.125% per year payable semi-annually on February 15 and August 15 of each year, commencing on February 15, 2022. The 2027 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the 2027 Notes, rank pari passu with all existing and future unsecured unsubordinated indebtedness issued by the Company, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
2028 Notes
On September 30, 2021, the Company issued $650.0 million in aggregate principal amount of its 2.850% notes due 2028 (the “2028 Notes”) pursuant to a supplemental indenture, dated as of September 30, 2021 (and together with the Base Indenture, the “2028 Notes Indenture”), to the Base Indenture between the Company and the Trustee.
The 2028 Notes will mature on September 30, 2028 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the 2028 Notes Indenture. The 2028 Notes bear interest at a rate of 2.850% per year payable semi-annually on March 30 and September 30 of each year, commencing on March 30, 2022. The 2028 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the 2028 Notes, rank pari passu with all existing and future unsecured unsubordinated indebtedness issued by the Company, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
November 2027 Notes
On May 20, 2024, the Company issued $400.0 million in aggregate principal amount of its 5.875% notes due 2027 (the “November 2027 Notes”) pursuant to a supplemental indenture, dated as of May 20, 2024 (and together with the Base Indenture, the “November 2027 Notes Indenture”), to the Base Indenture between the Company and the Trustee.
The November 2027 Notes will mature on November 15, 2027 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the November 2027 Notes Indenture. The November 2027 Notes bear interest at a rate of 5.875% per year payable semi-annually on May 15 and November 15 of each year, commencing on November 15, 2024. The November 2027 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the November 2027 Notes, rank pari passu with all existing and future unsecured unsubordinated indebtedness issued by the Company, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
In connection with the November 2027 Notes, the Company entered into an interest rate swap to more closely align the interest rates of the Company’s liabilities with the investment portfolio, which consists of predominately floating rate loans. The Company designated this interest rate swap and the November 2027 Notes in a qualifying hedge accounting relationship.
April 2028 Notes
On October 15, 2024 and December 16, 2024, the Company issued $400.0 million aggregate principal amount and $300.0 million aggregate principal amount, respectively, of 5.350% notes due 2028 (the “April 2028 Notes”) pursuant to a supplemental indenture, dated as of October 15, 2024 (and together with the Base Indenture, the “April 2028 Notes Indenture”), to the Base Indenture between the Company and the Trustee.
The April 2028 Notes will mature on April 13, 2028 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the April 2028 Notes Indenture. The April 2028 Notes bear interest at a rate of 5.350% per year payable semi-annually on April 13 and October 13 of each year, commencing on April 13, 2025. The April 2028 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the April 2028 Notes, rank pari passu with all existing and future unsecured indebtedness issued by the Company that are not so subordinated, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
In connection with the April 2028 Notes, the Company entered into interest rate swaps to more closely align the interest rates of the Company’s liabilities with the investment portfolio, which consists of predominately floating rate loans. The Company designated these interest rate swaps and the April 2028 Notes in a qualifying hedge accounting relationship.
June 2030 Notes
On March 4, 2025, the Company issued $500.0 million in aggregate principal amount of its 5.300% notes due 2030 (the “June 2030 Notes”) pursuant to a supplemental indenture, dated as of March 4, 2025 (and together with the Base Indenture, the “June 2030 Notes Indenture”), to the Base Indenture between the Company and the Trustee.
The June 2030 Notes will mature on June 30, 2030 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the June 2030 Notes Indenture. The June 2030 Notes bear interest at a rate of 5.300% per year payable semi-annually on June 30 and December 30 of each year, commencing on June 30, 2025. The June 2030 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the June 2030 Notes, rank pari passu with all existing and future unsecured unsubordinated indebtedness issued by the Company, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
In connection with the June 2030 Notes, the Company entered into an interest rate swap to more closely align the interest rates of the Company’s liabilities with the investment portfolio, which consists of predominately floating-rate loans. The Company designated this interest rate swap and the June 2030 Notes in a qualifying hedge accounting relationship.
January 2031 Notes
On October 14, 2025, the Company issued $500.0 million aggregate principal amount of 5.125% notes due 2031 (the “January 2031 Notes”) pursuant to a supplemental indenture, dated as of October 14, 2025 (and together with the Base Indenture, the “January 2031 Notes Indenture”), to the Base Indenture between the Company and the Trustee.

The January 2031 Notes will mature on January 31, 2031 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the January 2031 Notes Indenture. The January 2031 Notes bear interest at a rate of 5.125% per year payable semi-annually on January 31 and July 31 of each year, commencing on January 31, 2026. The January 2031 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the January 2031 Notes, rank pari passu with all existing and future unsecured indebtedness issued by the Company that are not so subordinated, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
In connection with the January 2031 Notes, the Company entered into an interest rate swap to more closely align the interest rates of the Company’s liabilities with the investment portfolio, which consists of predominately floating-rate loans. The Company designated this interest rate swap and the January 2031 Notes in a qualifying hedge accounting relationship.
September 2029 Notes
On March 3, 2026, the Company issued $400.0 million aggregate principal amount of 5.250% notes due 2029 (the “September 2029 Notes”) pursuant to a supplemental indenture, dated as of March 3, 2026 (and together with the Base Indenture, the “September 2029 Notes Indenture”), to the Base Indenture between the Company and the Trustee.

The September 2029 Notes will mature on September 4, 2029 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the September 2029 Notes Indenture. The September 2029 Notes bear interest at a rate of 5.250% per year payable semi-annually on March 4 and September 4 of each year, commencing on September 4, 2026. The September 2029 Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the September 2029 Notes, rank pari passu with all existing and future unsecured indebtedness issued by the Company that are not so subordinated, rank effectively junior to any of the Company’s secured indebtedness (including unsecured indebtedness that the Company later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries, financing vehicles or similar facilities.
In connection with the September 2029 Notes, the Company entered into an interest rate swap to more closely align the interest rates of the Company’s liabilities with the investment portfolio, which consists of predominately floating-rate loans. The Company designated this interest rate swap and the September 2029 Notes in a qualifying hedge accounting relationship.
Debt Securitizations
The Company has determined that the securitization vehicles noted below operate as an extension of the Company and therefore, will be consolidated by the Company.
2024-1 CLO Debt Securitization
On November 21, 2024, the Company completed a $746.8 million term debt securitization (the “2024-1 Debt Securitization”). Term debt securitizations are also known as collateralized loan obligations and are a form of secured financing incurred by the Company, which is consolidated by the Company for financial reporting purposes and subject to its overall asset coverage requirement. The notes offered in the 2024-1 Debt Securitization (collectively, the “2024-1 Notes”) were issued by the 2024-1 Issuer, an indirectly wholly-owned and consolidated (for tax and accounting purposes) subsidiary of the Company, and are primarily secured by a diversified portfolio of private credit loans and participation interests therein.
The following table presents information on the secured notes issued and the secured loans incurred in the 2024-1 Debt Securitization:
March 31, 2026
DescriptionTypePrincipal OutstandingInterest RateCredit Rating
Class A Notes (2)
Senior Secured Floating Rate$— SOFR + 1.51%Aaa
Class A-L Loans (2)
Senior Secured Floating Rate412,500 SOFR + 1.51%Aaa
Class B NotesSenior Secured Floating Rate45,000 SOFR + 1.78%Aa2
Class C Notes (1)
Mezzanine Secured Deferrable Floating Rate52,500 SOFR + 2.00%A2
Total Secured Notes510,000 
Subordinated Notes (1)
Subordinated236,770 NoneNot Rated
Total 2024-1 Notes$746,770 None
(1)The Company retained all of the Class C Notes and the Subordinated Notes issued in the 2024-1 Debt Securitization which are eliminated in consolidation.
(2)Upon a conversion of the Class A-L Loans in accordance with the Indenture and the Class A-L Loan Agreement, the Aggregate Outstanding Amount of the Class A Notes may be increased by up to $412.5 million and the Aggregate Outstanding Amount of the Class A-L Loans reduced by a corresponding amount.
The Company (through its wholly-owned and consolidated subsidiary, BXSL CLO 2024-1 Depositor LLC) retained all of the Class C Notes and the Subordinated Notes issued in the 2024-1 Debt Securitization in part in exchange for the Company’s sale and contribution to the 2024-1 Issuer of the initial closing date portfolio. The 2024-1 Notes are scheduled to mature on October 20, 2036; however, the 2024-1 Notes may be redeemed by the 2024-1 Issuer, at the direction of the Company through its holder of the Subordinated Notes (through BXSL CLO 2024-1 Depositor LLC), on any business day after October 20, 2026. In connection with the sale and contribution, the Company has made customary representations, warranties and covenants to the 2024-1 Issuer. The Class A Notes, Class A-L Loans, Class B Notes and Class C Notes are secured obligations of the 2024-1 Issuer, the Subordinated Notes are the unsecured obligations of the 2024-1 Issuer, and the indenture governing the 2024-1 Notes includes customary covenants and events of default.
The 2024-1 Notes have not been, and will not be, registered under the Securities Act, or any state securities or “blue sky” laws and may not be offered or sold in the United States absent registration with the SEC or an applicable exemption from registration.
The Company serves as collateral manager to the 2024-1 Issuer under a collateral management agreement and has agreed to irrevocably waive all collateral management fees payable pursuant to the collateral management agreement.
The following presents the assets and liabilities of the 2024-1 Issuer, after giving effect to the elimination of intercompany balances. The assets of the 2024-1 Issuer are restricted to be used to settle the obligations of 2024-1 Issuer. The liabilities of the 2024-1 Issuer are only the obligations of the 2024-1 Issuer and the creditors (or beneficial interest holders) do not have recourse to the Company.
 March 31, 2026December 31, 2025
ASSETS
Investments at fair value
Non-controlled/non-affiliated investments$717,480 $727,232 
Total investments at fair value
717,480 727,232 
Cash and cash equivalents (restricted cash of $75,966 and $89,406, respectively)
75,966 89,406 
Interest receivable from non-controlled/non-affiliated investments
5,242 9,291 
Total assets$798,688 $825,929 
LIABILITIES
Debt (net of unamortized debt issuance costs of $2,162 and $2,212, respectively)
$455,338 $455,288 
Interest payable
4,696 5,029 
Total liabilities$460,034 $460,317 
The Company’s outstanding debt obligations were as follows:
March 31, 2026
Aggregate Principal CommittedOutstanding PrincipalCarrying Value (net of unamortized issuance costs, premiums and discounts)Unamortized Debt Issuance Costs (including premiums and discounts)
Unused Portion (1)
Amount Available (2)
Jackson Hole Funding Facility (3)
$500,000 $105,374 $105,374 $— $394,626 $254,563 
Breckenridge Funding Facility1,175,000 771,850 771,850 — 403,150 403,150 
Big Sky Funding Facility650,000 520,400 520,400 — 129,600 129,600 
BXSL 2025-1 Facility400,000 327,700 327,700 — 72,300 72,300 
Revolving Credit Facility (4)
2,525,000 1,392,991 1,392,991 — 1,132,009 1,132,009 
New 2026 Notes700,000 700,000 699,184 816 — — 
2027 Notes650,000 650,000 647,589 2,411 — — 
2028 Notes650,000 650,000 645,300 4,700 — — 
November 2027 Notes (5)
400,000 400,000 401,101 3,292 — — 
April 2028 Notes (5)
700,000 700,000 695,894 5,447 — — 
June 2030 Notes (5)
500,000 500,000 494,472 8,998 — — 
January 2031 Notes (5)
500,000 500,000 487,076 8,200 — — 
September 2029 Notes (5)
400,000 400,000 389,617 5,814 — — 
2024-1 Notes457,500 457,500 455,338 2,162 — — 
Total$10,207,500 $8,075,815 $8,033,886 $41,840 $2,131,685 $1,991,622 
(1)The unused portion is the amount upon which commitment fees, if any, are based.
(2)The amount available reflects any limitations related to each respective credit facility’s borrowing base.
(3)Under the Jackson Hole Funding Facility, the Company may borrow in USD or certain other permitted currencies. As of March 31, 2026, the Company had no borrowings denominated in currencies other than USD.
(4)Under the Revolving Credit Facility, the Company may borrow in USD or certain other permitted currencies. As of March 31, 2026, the Company had non-USD borrowings denominated in the following currencies:
•CAD 38.4 million
•EUR 469.5 million
•GBP 293.5 million
•AUD 1.0 million
(5)Carrying value is inclusive of adjustment for the change in fair value of effective hedge relationship.
December 31, 2025
Aggregate Principal CommittedOutstanding PrincipalCarrying ValueUnamortized Debt Issuance Costs
Unused Portion (1)
Amount Available (2)
Jackson Hole Funding Facility (3)
$500,000 $22,374 $22,374 $— $477,626 $477,626 
Breckenridge Funding Facility1,175,000 652,550 652,550 — 522,450 418,348 
Big Sky Funding Facility650,000 585,900 585,900 — 64,100 64,100 
BXSL 2025-1 Facility400,000 34,800 34,800 — 365,200 351,400 
Revolving Credit Facility (4)
2,425,000 1,447,497 1,447,497 — 977,503 977,503 
2026 Notes800,000 800,000 799,936 64 — — 
New 2026 Notes700,000 700,000 698,746 1,254 — — 
2027 Notes650,000 650,000 646,911 3,089 — — 
2028 Notes650,000 650,000 644,837 5,163 — — 
November 2027 Notes (5)
400,000 400,000 403,760 3,803 — — 
April 2028 Notes (5)
700,000 700,000 700,057 6,107 — — 
June 2030 Notes (5)
500,000 500,000 497,626 9,520 — — 
January 2031 Notes (5)
500,000 500,000 489,847 8,688 — — 
2024-1 Notes457,500 457,500 455,288 2,212 — — 
Total$10,507,500 $8,100,621 $8,080,129 $39,900 $2,406,879 $2,288,977 
(1)The unused portion is the amount upon which commitment fees, if any, are based.
(2)The amount available reflects any limitations related to each respective credit facility’s borrowing base.
(3)Under the Jackson Hole Funding Facility, the Company may borrow in USD or certain other permitted currencies. As of December 31, 2025, the Company had no borrowings denominated in currencies other than USD.
(4)Under the Revolving Credit Facility, the Company may borrow in USD or certain other permitted currencies. As of December 31, 2025, the Company had non-USD borrowings denominated in the following currencies:
•CAD 30.7 million
•EUR 417.2 million
•GBP 293.5 million
•AUD 1.0 million
(5)Carrying value is inclusive of adjustment for the change in fair value of effective hedge relationship.
The following tables summarize the contractual maturities of the Company’s outstanding principal as of March 31, 2026 and December 31, 2025:
March 31, 2026
Less than 1 Year1 - 3 Years3 - 5 YearsGreater than 5 YearsTotal
SPV Financing Facilities$— $953,474 $771,850 $— $1,725,324 
Revolving Credit Facility— — 1,392,991 — 1,392,991 
Unsecured Notes1,350,000 1,750,000 1,400,000 — 4,500,000 
Debt Securitizations— — — 457,500 457,500 
Total outstanding principal$1,350,000 $2,703,474 $3,564,841 $457,500 $8,075,815 
December 31, 2025
Less than 1 Year1 - 3 Years3 - 5 YearsGreater than 5 YearsTotal
SPV Financing Facilities$— $643,074 $652,550 $— $1,295,624 
Revolving Credit Facility— — 1,447,497 — 1,447,497 
Unsecured Notes1,500,000 2,400,000 500,000 500,000 4,900,000 
Debt Securitizations— — — 457,500 457,500 
Total outstanding principal$1,500,000 $3,043,074 $2,600,047 $957,500 $8,100,621 
As of March 31, 2026 and December 31, 2025, interest payable included $60.0 million and $60.8 million, respectively, of interest expense and $0.6 million and $1.2 million, respectively, of unused commitment fees.
For the three months ended March 31, 2026 and 2025, the weighted average interest rate on all borrowings outstanding (including unused fees, amortization of debt issuance costs (including premiums and discounts), and the impact of the application of hedge accounting) was 4.83% and 5.01%, respectively. For the three months ended March 31, 2026 and 2025, the weighted average all-in cost of debt (including unused fees, amortization of debt issuance costs (including premiums and discounts), amortization of deferred financing costs, and the impact of the application of hedge accounting) was 4.90% and 5.09%, respectively.
For the three months ended March 31, 2026 and 2025, the average principal debt outstanding was $8,172.9 million and $7,313.5 million, respectively.
The components of interest expense were as follows:
Three Months Ended March 31,
20262025
Borrowing interest expense$93,283 $87,640 
Facility unused fees2,160 1,701 
Amortization of deferred financing costs1,450 1,409 
Amortization of original issue discount and debt issuance costs (including premiums and discounts)3,935 3,350 
Gain (loss) from interest rate swaps accounted for as hedges and the related hedged items:
Interest rate swaps18,839 (15,409)
Hedged items(19,498)14,285 
Total interest expense$100,169 $92,976 
Cash paid for interest expense$115,628 $96,301 
v3.26.1
Commitment and Contingencies
 3 Months Ended
Mar. 31, 2026
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Commitments and Contingencies
Portfolio Company Commitments
The Company’s investment portfolio contains debt investments which are in the form of lines of credit or delayed draw commitments, which require us to provide funding when requested by portfolio companies in accordance with underlying loan agreements. As of March 31, 2026 and December 31, 2025, the Company had unfunded commitments, including delayed draw term loans and revolvers, with an aggregate amount of $1.6 billion and $1.8 billion, respectively.
Additionally, from time to time, the Advisers and their affiliates may commit to an investment on behalf of the investment vehicles they manage, including the Company. Certain terms of these investments are not finalized at the time of the commitment and each respective investment vehicle’s allocation may change prior to the date of funding. In this regard, as of March 31, 2026 and December 31, 2025, the Company estimates that $139.7 million and $151.8 million, respectively, of investments were committed but not yet funded.
Other Commitments and Contingencies
From time to time, the Company may become a party to certain legal proceedings incidental to the normal course of its business. As of March 31, 2026 and December 31, 2025, management is not aware of any material pending legal proceedings.
v3.26.1
Net Assets
 3 Months Ended
Mar. 31, 2026
Equity [Abstract]  
Net Assets Net Assets
Shares Issued
The Company has the authority to issue an unlimited number of Common Shares at $0.001 per share par value.
On October 28, 2021, the Company priced its IPO, and the Common Shares began trading on the NYSE under the symbol “BXSL.”
As of March 31, 2026, the Company is party to eight separate equity distribution agreements with sales agents (“Equity Distribution Agreements”), pursuant to which the Company may sell, from time to time, up to an aggregate sales price of $600.0 million of its Common Shares. Sales of Common Shares made pursuant to the Equity Distribution Agreements may be made in negotiated transactions or transactions that are deemed to be “at-the-market” offerings as defined in Rule 415(a)(5) under the Securities Act of 1933, as amended. Actual sales depend on a variety of factors including market conditions, the trading price of the Common Shares, the Company’s capital needs, and the Company’s determination of the appropriate sources of funding to meet such needs. As of March 31, 2026, Common Shares with an aggregate sales price of $557.4 million remained available for issuance under the Equity Distribution Agreements.
No Common Shares were issued for the three months ended March 31, 2026, other than those issued through the DRIP.
The following table summarizes the total Common Shares issued and proceeds received, for the three months ended March 31, 2025, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering ExpensesNet Proceeds
Average Share Price (1)
“At-the-market” Offering5,761,648 $186,697 $1,867 $184,830 $32.08 
(1)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
Distributions
The following table summarizes the Company’s distributions declared and payable for the three months ended March 31, 2026 (dollars in thousands except per share amounts):
Date DeclaredRecord DatePayment DatePer Share AmountTotal Amount
February 25, 2026March 31, 2026April 24, 2026$0.7700 $178,855 
Total distributions$0.7700 $178,855 
The following table summarizes the Company’s distributions declared and payable for the three months ended March 31, 2025 (dollars in thousands except per share amounts):
Date DeclaredRecord DatePayment DatePer Share AmountTotal Amount
February 26, 2025March 31, 2025April 25, 2025$0.7700 $175,421 
Total distributions$0.7700 $175,421 
Dividend Reinvestment
The Company has adopted the DRIP, pursuant to which it reinvests all cash dividends declared by the Board on behalf of its shareholders who do not elect to receive their dividends in cash. As a result, if the Board declares a cash dividend or other distribution, then the Company’s shareholders who have not opted out of the DRIP will have their cash distributions automatically reinvested in additional shares as described below, rather than receiving the cash dividend or other distribution. Starting from the consummation of the IPO, the number of shares to be issued to a shareholder is determined by dividing the total dollar amount of the cash dividend or distribution payable to a shareholder by the market price per common share at the close of regular trading on the NYSE on the payment date of a distribution, or if no sale is reported for such day, the average of the reported bid and ask prices. However, if the market price per share on the payment date of a cash dividend or distribution exceeds the most recently computed NAV per share, the Company will issue shares at the greater of (i) the most recently computed NAV per share and (ii) 95% of the current market price per share (or such lesser discount to the current market price per share that still exceeded the most recently computed NAV per share). For example, if the most recently computed NAV per share is $25.00 and the market price on the payment date of a cash dividend is $24.00 per share, the Company will issue shares at $24.00 per share. If the most recently computed NAV per share is $25.00 and the market price on the payment date of a cash dividend is $27.00 per share, the Company will issue shares at $25.65 per share (95% of the current market price). If the most recently computed NAV per share is $25.00 and the market price on the payment date of a cash dividend is $26.00 per share, the Company will issue shares at $25.00 per share.
Shareholders who receive distributions in the form of shares will generally be subject to the same U.S. federal, state and local tax consequences as if they received cash distributions; however, since their cash distributions will be reinvested, those shareholders will not receive cash with which to pay any applicable taxes. The Company intends to use newly issued shares to implement the plan.
Pursuant to the DRIP, the following table summarizes the amounts and shares issued to shareholders who have not opted out of the DRIP during the three months ended March 31, 2026 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 23, 2026$8,114 310,753 
Total distributions$8,114 310,753 
The following table summarizes the amounts and shares issued to shareholders who have not opted out of the DRIP during the three months ended March 31, 2025 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 24, 2025$5,130 165,096 
Total distributions$5,130 165,096 
Share Repurchase Plan
In February 2026, the Board authorized a share repurchase plan, under which the Company is authorized to repurchase up to $250.0 million in the aggregate of its outstanding Common Shares in the open market at prices below the Company’s NAV per share for a one-year term, in accordance with the guidelines specified in Rule 10b-18 of the Exchange Act (the “10b-18 Plan”). The timing, manner, price and amount of any share repurchases will be determined by the Company, in its sole discretion, based upon the evaluation of economic and market conditions, stock price, applicable legal and regulatory requirements and other factors.
For the three months ended March 31, 2026, the Company did not repurchase any of its Common Shares under the 10b-18 Plan.
v3.26.1
Earnings Per Share
 3 Months Ended
Mar. 31, 2026
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share:
Three Months Ended March 31,
20262025
Net increase (decrease) in net assets resulting from operations$25,246 $149,809 
Weighted average shares outstanding (basic and diluted)232,203,849 226,577,167 
Earnings (loss) per common share (basic and diluted)$0.11 $0.66 
v3.26.1
Financial Highlights and Senior Securities
 3 Months Ended
Mar. 31, 2026
Investment Company [Abstract]  
Financial Highlights and Senior Securities Financial Highlights and Senior Securities
The following are the financial highlights for the three months ended March 31, 2026 and 2025:
Three Months Ended March 31,
 20262025
Per Share Data (1):
Net asset value, beginning of period$26.92 $27.39 
Net investment income
0.77 0.83 
Net change in unrealized and realized gain (loss)
(0.66)(0.17)
Net increase (decrease) in net assets resulting from operations0.11 0.66 
Distributions from net investment income (2)
(0.77)(0.77)
Net increase (decrease) in net assets from capital share transactions— 0.11 
Total increase (decrease) in net assets(0.66)0.00 
Net asset value, end of period$26.26 $27.39 
Market value, end of period
$23.69 $32.36 
Shares outstanding, end of period232,279,811 227,818,928 
Total return based on NAV (3)
0.7 %2.8 %
Total return based on market value (4)
(7.4)%2.6 %
Ratios:
Ratio of net expenses to average net assets (5)
9.2 %10.5 %
Ratio of net investment income to average net assets (5)
11.6 %12.2 %
Portfolio turnover rate2.3 %5.3 %
Supplemental Data:
Net assets, end of period$6,099,680$6,240,869
Asset coverage ratio175.5 %184.2 %
(1)The per share data was derived by using the weighted average shares outstanding during the period.
(2)The per share data for distributions was derived by using the actual shares outstanding at the date of the relevant transactions (refer to Note 9).
(3)Total return is calculated as the change in NAV per share during the period, plus distributions per share (assuming dividends and distributions are reinvested in accordance with the DRIP) divided by the beginning NAV per share. Total return does not include sales load.
(4)Total return based on market value is calculated as the change in market value per share during the respective periods, taking into account distributions, if any, reinvested in accordance with the DRIP.
(5)Amounts are annualized except for amounts relating to excise and other tax expense. For the three months ended March 31, 2026 and 2025, the ratio of total operating expenses to average net assets was 9.2% and 10.5%, respectively
The following is information about the Company’s senior securities as of the dates indicated in the table below:
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
Subscription Facility
March 31, 2026$— $— —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019119,752 2,151 —N/A
December 31, 2018— — —N/A
Jackson Hole Funding Facility
March 31, 2026105,374 1,755 —N/A
December 31, 202522,374 1,771 —N/A
December 31, 2024399,874 1,857 —N/A
December 31, 2023233,019 2,003 —N/A
December 31, 2022360,019 1,748 —N/A
December 31, 2021361,007 1,802 —N/A
December 31, 2020362,316 2,300 —N/A
December 31, 2019514,151 2,151 —N/A
December 31, 2018120,000 2,278 —N/A
Breckenridge Funding Facility
March 31, 2026771,850 1,755 —N/A
December 31, 2025652,550 1,771 —N/A
December 31, 2024649,350 1,857 —N/A
December 31, 2023741,700 2,003 —N/A
December 31, 2022825,000 1,748 —N/A
December 31, 2021568,680 1,802 —N/A
December 31, 2020569,000 2,300 —N/A
December 31, 2019820,311 2,151 —N/A
December 31, 201865,000 2,278 —N/A
Big Sky Funding Facility
March 31, 2026520,400 1,755 —N/A
December 31, 2025585,900 1,771 —N/A
December 31, 2024400,000 1,857 —N/A
December 31, 2023480,906 2,003 —N/A
December 31, 2022499,606 1,748 —N/A
December 31, 2021499,606 1,802 —N/A
December 31, 2020200,346 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
BXSL 2025-1 Facility
March 31, 2026$327,700 $1,755 —N/A
December 31, 202534,800 1,771 —N/A
December 31, 2024— 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Revolving Credit Facility
March 31, 20261,392,991 1,755 —N/A
December 31, 20251,447,497 1,771 —N/A
December 31, 20241,287,140 1,857 —N/A
December 31, 2023682,258 2,003 —N/A
December 31, 2022678,378 1,748 —N/A
December 31, 2021915,035 1,802 —N/A
December 31, 2020182,901 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2023 Notes
March 31, 2026— — —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022400,000 1,748 —N/A
December 31, 2021400,000 1,802 —N/A
December 31, 2020400,000 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2026 Notes
March 31, 2026— — —N/A
December 31, 2025800,000 1,771 —N/A
December 31, 2024800,000 1,857 —N/A
December 31, 2023800,000 2,003 —N/A
December 31, 2022800,000 1,748 —N/A
December 31, 2021800,000 1,802 —N/A
December 31, 2020800,000 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
New 2026 Notes
March 31, 2026$700,000 $1,755 —N/A
December 31, 2025700,000 1,771 —N/A
December 31, 2024700,000 1,857 —N/A
December 31, 2023700,000 2,003 —N/A
December 31, 2022700,000 1,748 —N/A
December 31, 2021700,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2027 Notes
March 31, 2026650,000 1,755 —N/A
December 31, 2025650,000 1,771 —N/A
December 31, 2024650,000 1,857 —N/A
December 31, 2023650,000 2,003 —N/A
December 31, 2022650,000 1,748 —N/A
December 31, 2021650,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2028 Notes
March 31, 2026650,000 1,755 —N/A
December 31, 2025650,000 1,771 —N/A
December 31, 2024650,000 1,857 —N/A
December 31, 2023650,000 2,003 —N/A
December 31, 2022650,000 1,748 —N/A
December 31, 2021650,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
November 2027 Notes
March 31, 2026400,000 1,755 —N/A
December 31, 2025400,000 1,771 —N/A
December 31, 2024400,000 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
April 2028 Notes
March 31, 2026$700,000 $1,755 —N/A
December 31, 2025700,000 1,771 —N/A
December 31, 2024700,000 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
June 2030 Notes
March 31, 2026500,000 1,755 —N/A
December 31, 2025500,000 1,771 —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
January 2031 Notes
March 31, 2026500,000 1,755 —N/A
December 31, 2025500,000 1,771 —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
September 2029 Notes
March 31, 2026400,000 1,755 —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
2024-1 Notes
March 31, 2026$457,500 $1,755 —N/A
December 31, 2025457,500 1,771 —N/A
December 31, 2024457,500 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
(1)Total amount of each class of senior securities outstanding at the end of the period presented.
(2)Asset coverage per unit is the ratio of the carrying value of the Company’s total assets, less all liabilities excluding indebtedness represented by senior securities in this table, to the aggregate amount of senior securities representing indebtedness. Asset coverage per unit is expressed in terms of dollar amounts per $1,000 of indebtedness and is calculated on a consolidated basis.
(3)The amount to which such class of senior security would be entitled upon the Company’s involuntary liquidation in preference to any security junior to it. The “-” in this column indicates information that the SEC expressly does not require to be disclosed for certain types of senior securities.
(4)Not applicable because the senior securities are not registered for public trading.
As of March 31, 2026 and December 31, 2025, the aggregate principal amount of indebtedness outstanding was $8.1 billion and $8.1 billion, respectively.
v3.26.1
Segment Reporting
 3 Months Ended
Mar. 31, 2026
Segment Reporting [Abstract]  
Segment Reporting Segment Reporting
The Company operates as a single reportable segment and derives revenues from investing primarily in originated loans and other securities, including broadly syndicated loans, of U.S. private companies and manages the business on a consolidated basis.
The chief operating decision maker (“CODM”) consists of the Company’s co-chief executive officers and chief financial officer. The primary performance metric provided to the CODM to assess performance and make operating decisions is Net increase (decrease) in net assets resulting from operations which is reported on the Condensed Consolidated Statements of Operations.
Performance metrics are provided to the CODM on a quarterly basis and are utilized to evaluate performance generated from segment net assets. These key metrics, in addition to other factors, are utilized by the CODM to determine allocation of profits, such as for investment or the amount of dividends to be distributed to the Company’s shareholders. As the Company operates as a single reporting segment, the segment net assets are reported on the Condensed Consolidated Statements of Assets and Liabilities as Total net assets and the significant segment expenses are listed on the Condensed Consolidated Statements of Operations.
v3.26.1
Subsequent Events
 3 Months Ended
Mar. 31, 2026
Subsequent Events [Abstract]  
Subsequent Events Subsequent Events
The Company’s management evaluated subsequent events through the date of issuance of the condensed consolidated financial statements. There have been no subsequent events that occurred during such period that would require disclosure in, or would be required to be recognized in the condensed consolidated financial statements as of March 31, 2026, except as discussed below.
On May 7, 2026, the Board declared a distribution of $0.77 per share to shareholders of record as of June 30, 2026, which is payable on or about July 24, 2026.
v3.26.1
Insider Trading Arrangements
 3 Months Ended
Mar. 31, 2026
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
v3.26.1
N-2 - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cover [Abstract]                    
Entity Central Index Key 0001736035                  
Amendment Flag false                  
Securities Act File Number 814-01299                  
Document Type 10-Q                  
Entity Registrant Name Blackstone Secured Lending Fund                  
Entity Address, Address Line One 345 Park Avenue                  
Entity Address, City or Town New York                  
Entity Address, State or Province NY                  
Entity Address, Postal Zip Code 10154                  
City Area Code 212                  
Local Phone Number 503-2100                  
Entity Emerging Growth Company false                  
Financial Highlights [Abstract]                    
Senior Securities [Table Text Block]
The following is information about the Company’s senior securities as of the dates indicated in the table below:
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
Subscription Facility
March 31, 2026$— $— —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019119,752 2,151 —N/A
December 31, 2018— — —N/A
Jackson Hole Funding Facility
March 31, 2026105,374 1,755 —N/A
December 31, 202522,374 1,771 —N/A
December 31, 2024399,874 1,857 —N/A
December 31, 2023233,019 2,003 —N/A
December 31, 2022360,019 1,748 —N/A
December 31, 2021361,007 1,802 —N/A
December 31, 2020362,316 2,300 —N/A
December 31, 2019514,151 2,151 —N/A
December 31, 2018120,000 2,278 —N/A
Breckenridge Funding Facility
March 31, 2026771,850 1,755 —N/A
December 31, 2025652,550 1,771 —N/A
December 31, 2024649,350 1,857 —N/A
December 31, 2023741,700 2,003 —N/A
December 31, 2022825,000 1,748 —N/A
December 31, 2021568,680 1,802 —N/A
December 31, 2020569,000 2,300 —N/A
December 31, 2019820,311 2,151 —N/A
December 31, 201865,000 2,278 —N/A
Big Sky Funding Facility
March 31, 2026520,400 1,755 —N/A
December 31, 2025585,900 1,771 —N/A
December 31, 2024400,000 1,857 —N/A
December 31, 2023480,906 2,003 —N/A
December 31, 2022499,606 1,748 —N/A
December 31, 2021499,606 1,802 —N/A
December 31, 2020200,346 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
BXSL 2025-1 Facility
March 31, 2026$327,700 $1,755 —N/A
December 31, 202534,800 1,771 —N/A
December 31, 2024— 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Revolving Credit Facility
March 31, 20261,392,991 1,755 —N/A
December 31, 20251,447,497 1,771 —N/A
December 31, 20241,287,140 1,857 —N/A
December 31, 2023682,258 2,003 —N/A
December 31, 2022678,378 1,748 —N/A
December 31, 2021915,035 1,802 —N/A
December 31, 2020182,901 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2023 Notes
March 31, 2026— — —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022400,000 1,748 —N/A
December 31, 2021400,000 1,802 —N/A
December 31, 2020400,000 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2026 Notes
March 31, 2026— — —N/A
December 31, 2025800,000 1,771 —N/A
December 31, 2024800,000 1,857 —N/A
December 31, 2023800,000 2,003 —N/A
December 31, 2022800,000 1,748 —N/A
December 31, 2021800,000 1,802 —N/A
December 31, 2020800,000 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
New 2026 Notes
March 31, 2026$700,000 $1,755 —N/A
December 31, 2025700,000 1,771 —N/A
December 31, 2024700,000 1,857 —N/A
December 31, 2023700,000 2,003 —N/A
December 31, 2022700,000 1,748 —N/A
December 31, 2021700,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2027 Notes
March 31, 2026650,000 1,755 —N/A
December 31, 2025650,000 1,771 —N/A
December 31, 2024650,000 1,857 —N/A
December 31, 2023650,000 2,003 —N/A
December 31, 2022650,000 1,748 —N/A
December 31, 2021650,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2028 Notes
March 31, 2026650,000 1,755 —N/A
December 31, 2025650,000 1,771 —N/A
December 31, 2024650,000 1,857 —N/A
December 31, 2023650,000 2,003 —N/A
December 31, 2022650,000 1,748 —N/A
December 31, 2021650,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
November 2027 Notes
March 31, 2026400,000 1,755 —N/A
December 31, 2025400,000 1,771 —N/A
December 31, 2024400,000 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
April 2028 Notes
March 31, 2026$700,000 $1,755 —N/A
December 31, 2025700,000 1,771 —N/A
December 31, 2024700,000 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
June 2030 Notes
March 31, 2026500,000 1,755 —N/A
December 31, 2025500,000 1,771 —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
January 2031 Notes
March 31, 2026500,000 1,755 —N/A
December 31, 2025500,000 1,771 —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
September 2029 Notes
March 31, 2026400,000 1,755 —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
2024-1 Notes
March 31, 2026$457,500 $1,755 —N/A
December 31, 2025457,500 1,771 —N/A
December 31, 2024457,500 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
(1)Total amount of each class of senior securities outstanding at the end of the period presented.
(2)Asset coverage per unit is the ratio of the carrying value of the Company’s total assets, less all liabilities excluding indebtedness represented by senior securities in this table, to the aggregate amount of senior securities representing indebtedness. Asset coverage per unit is expressed in terms of dollar amounts per $1,000 of indebtedness and is calculated on a consolidated basis.
(3)The amount to which such class of senior security would be entitled upon the Company’s involuntary liquidation in preference to any security junior to it. The “-” in this column indicates information that the SEC expressly does not require to be disclosed for certain types of senior securities.
(4)Not applicable because the senior securities are not registered for public trading.
                  
General Description of Registrant [Abstract]                    
Investment Objectives and Practices [Text Block]
Our investment objectives are to generate current income and, to a lesser extent, long-term capital appreciation.
Under normal market conditions, we generally invest at least 80% of our total assets (net assets plus borrowings for investment purposes) in secured debt investments and our portfolio is composed primarily of first lien senior secured and unitranche loans. To a lesser extent, we have and may continue to also invest in second lien, third lien, unsecured or subordinated loans and other debt and equity securities. In limited instances, we may retain the “last out” portion of a first-lien loan. In such cases, the “first out” portion of the first lien loan would receive priority with respect to payment over our “last out” position. In exchange for the higher risk of loss associated with such “last out” portion, we would earn a higher rate of interest than the “first out” position. We do not currently focus on investments in issuers that are distressed or in need of rescue financing.
Financial Condition, Liquidity and Capital Resources
Our liquidity and capital resources are generated primarily from cash flows from interest, dividends and fees earned from our investments and principal repayments, our credit facilities, debt securitization transactions, and other secured and unsecured debt. We may also generate cash flow from operations, future borrowings and future offerings of securities including public or private issuances of debt or equity securities through both registered offerings and private offerings. The primary uses of our cash and cash equivalents are for (i) originating loans and purchasing senior secured debt investments, (ii) funding the costs of our operations (including fees paid to our Adviser and expense reimbursements paid to our Administrator), (iii) debt service, repayment and other financing costs of our borrowings and (iv) cash distributions to the holders of our Common Shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that was effective for a term of three years. In July 2025, we filed a new shelf registration statement with the SEC that is effective for a term of three years and expires in July 2028. The amount of securities to be issued pursuant to the shelf registration statement filed in July 2025 was not specified when it was filed and there is no specific dollar limit on the amount of securities we may issue. The securities covered by the registration statement filed in July 2025 include: (i) Common Shares; (ii) preferred shares; (iii) debt securities; (iv) subscription rights; and (v) warrants. The specifics of any future offerings, along with the use of proceeds of any securities offered, will be described in detail in a prospectus supplement, or other offering materials, at the time of any offering.
As of March 31, 2026 and December 31, 2025, our debt consisted of asset based leverage facilities, a revolving credit facility, unsecured note issuances and debt securitizations. We have and will continue to, from time to time, enter into additional credit facilities, increase the size of our existing credit facilities or issue further debt securities. Any such incurrence or issuance would be subject to prevailing market conditions, our liquidity requirements, contractual and regulatory restrictions and other factors. In accordance with the 1940 Act, with certain limited exceptions, we are only allowed to incur borrowings, issue debt securities or issue preferred stock, if immediately after the borrowing or issuance, the ratio of total assets (less total liabilities other than indebtedness) to total indebtedness plus preferred stock, is at least 150%. As of March 31, 2026 and December 31, 2025, we had an aggregate amount of $8.1 billion and $8.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 175.5% and 177.1%, respectively. We seek to carefully consider our unfunded commitments for the purpose of planning our ongoing financial leverage. Further, we maintain sufficient borrowing capacity within the 150% asset coverage limitation to cover any outstanding unfunded commitments we expect to be required to fund. From time to time we may also repurchase our outstanding debt. Such repurchases, if any, will depend on prevailing market conditions, our
liquidity requirements, contractual restrictions, and other factors. The amounts involved in any such purchase transactions, individually or in the aggregate, may be material.
Cash and cash equivalents (excluding restricted cash) as of March 31, 2026, taken together with our $2.1 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.0 billion is available to borrow) is expected to be sufficient for our investing activities and to conduct our operations in the near term. Additionally, we held $200.0 million of Level 1 and Level 2 investments as of March 31, 2026.
Although we have historically been able to obtain sufficient borrowing capacity, a deterioration in economic conditions or any other negative economic developments could restrict our access to financing in the future. We may not be able to find new financing for future investments or liquidity needs and, even if we are able to obtain such financing, such financing may not be on as favorable terms as we have previously obtained. These factors may limit our ability to make new investments and adversely impact our results of operations.
As of March 31, 2026, we had $351.3 million in cash and cash equivalents (including restricted cash). During the three months ended March 31, 2026, cash provided by operating activities was $249.3 million, which reflected an increase in net assets resulting from operations of $25.2 million, adjusted for $157.6 million of net unrealized depreciation of investments. Cash provided by operating activities was further driven by proceeds from sales of investments and principal repayments of $450.9 million, partially offset by purchases of investments of $324.8 million. Cash used in financing activities was $184.2 million during the period, which was primarily as a result of dividends paid in cash of $170.5 million and net repayments on debt of $12.9 million.
                  
Risk Factors [Table Text Block]
Financial Condition, Liquidity and Capital Resources
Our liquidity and capital resources are generated primarily from cash flows from interest, dividends and fees earned from our investments and principal repayments, our credit facilities, debt securitization transactions, and other secured and unsecured debt. We may also generate cash flow from operations, future borrowings and future offerings of securities including public or private issuances of debt or equity securities through both registered offerings and private offerings. The primary uses of our cash and cash equivalents are for (i) originating loans and purchasing senior secured debt investments, (ii) funding the costs of our operations (including fees paid to our Adviser and expense reimbursements paid to our Administrator), (iii) debt service, repayment and other financing costs of our borrowings and (iv) cash distributions to the holders of our Common Shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that was effective for a term of three years. In July 2025, we filed a new shelf registration statement with the SEC that is effective for a term of three years and expires in July 2028. The amount of securities to be issued pursuant to the shelf registration statement filed in July 2025 was not specified when it was filed and there is no specific dollar limit on the amount of securities we may issue. The securities covered by the registration statement filed in July 2025 include: (i) Common Shares; (ii) preferred shares; (iii) debt securities; (iv) subscription rights; and (v) warrants. The specifics of any future offerings, along with the use of proceeds of any securities offered, will be described in detail in a prospectus supplement, or other offering materials, at the time of any offering.
As of March 31, 2026 and December 31, 2025, our debt consisted of asset based leverage facilities, a revolving credit facility, unsecured note issuances and debt securitizations. We have and will continue to, from time to time, enter into additional credit facilities, increase the size of our existing credit facilities or issue further debt securities. Any such incurrence or issuance would be subject to prevailing market conditions, our liquidity requirements, contractual and regulatory restrictions and other factors. In accordance with the 1940 Act, with certain limited exceptions, we are only allowed to incur borrowings, issue debt securities or issue preferred stock, if immediately after the borrowing or issuance, the ratio of total assets (less total liabilities other than indebtedness) to total indebtedness plus preferred stock, is at least 150%. As of March 31, 2026 and December 31, 2025, we had an aggregate amount of $8.1 billion and $8.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 175.5% and 177.1%, respectively. We seek to carefully consider our unfunded commitments for the purpose of planning our ongoing financial leverage. Further, we maintain sufficient borrowing capacity within the 150% asset coverage limitation to cover any outstanding unfunded commitments we expect to be required to fund. From time to time we may also repurchase our outstanding debt. Such repurchases, if any, will depend on prevailing market conditions, our
liquidity requirements, contractual restrictions, and other factors. The amounts involved in any such purchase transactions, individually or in the aggregate, may be material.
Cash and cash equivalents (excluding restricted cash) as of March 31, 2026, taken together with our $2.1 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.0 billion is available to borrow) is expected to be sufficient for our investing activities and to conduct our operations in the near term. Additionally, we held $200.0 million of Level 1 and Level 2 investments as of March 31, 2026.
Although we have historically been able to obtain sufficient borrowing capacity, a deterioration in economic conditions or any other negative economic developments could restrict our access to financing in the future. We may not be able to find new financing for future investments or liquidity needs and, even if we are able to obtain such financing, such financing may not be on as favorable terms as we have previously obtained. These factors may limit our ability to make new investments and adversely impact our results of operations.
As of March 31, 2026, we had $351.3 million in cash and cash equivalents (including restricted cash). During the three months ended March 31, 2026, cash provided by operating activities was $249.3 million, which reflected an increase in net assets resulting from operations of $25.2 million, adjusted for $157.6 million of net unrealized depreciation of investments. Cash provided by operating activities was further driven by proceeds from sales of investments and principal repayments of $450.9 million, partially offset by purchases of investments of $324.8 million. Cash used in financing activities was $184.2 million during the period, which was primarily as a result of dividends paid in cash of $170.5 million and net repayments on debt of $12.9 million.
Item 3. Quantitative and Qualitative Disclosures About Market Risk.
Uncertainty with respect to the economic conditions has introduced significant volatility in the financial markets, and the effect of the volatility could materially impact our market risks. We are subject to financial market risks, including valuation risk and interest rate risk. Our exposure to valuation risk has not materially changed from what was previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2025.
Interest Rate Risk
Interest rate sensitivity refers to the change in earnings that may result from changes in the level of interest rates. We intend to fund portions of our investments with borrowings, and at such time, our net investment income will be affected by the difference between the rate at which we invest and the rate at which we borrow. Accordingly, we cannot assure shareholders that a significant change in market interest rates will not have a material adverse effect on our net investment income.
In a declining interest rate environment, the difference between the total interest income earned on interest earning assets and the total interest expense incurred on interest bearing liabilities may be compressed, reducing our net income and potentially adversely affecting our operating results. Conversely, in a rising interest rate environment, such difference could potentially increase thereby increasing our net income as indicated per the table below.
                  
Effects of Leverage [Text Block]
Financial Condition, Liquidity and Capital Resources
Our liquidity and capital resources are generated primarily from cash flows from interest, dividends and fees earned from our investments and principal repayments, our credit facilities, debt securitization transactions, and other secured and unsecured debt. We may also generate cash flow from operations, future borrowings and future offerings of securities including public or private issuances of debt or equity securities through both registered offerings and private offerings. The primary uses of our cash and cash equivalents are for (i) originating loans and purchasing senior secured debt investments, (ii) funding the costs of our operations (including fees paid to our Adviser and expense reimbursements paid to our Administrator), (iii) debt service, repayment and other financing costs of our borrowings and (iv) cash distributions to the holders of our Common Shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that was effective for a term of three years. In July 2025, we filed a new shelf registration statement with the SEC that is effective for a term of three years and expires in July 2028. The amount of securities to be issued pursuant to the shelf registration statement filed in July 2025 was not specified when it was filed and there is no specific dollar limit on the amount of securities we may issue. The securities covered by the registration statement filed in July 2025 include: (i) Common Shares; (ii) preferred shares; (iii) debt securities; (iv) subscription rights; and (v) warrants. The specifics of any future offerings, along with the use of proceeds of any securities offered, will be described in detail in a prospectus supplement, or other offering materials, at the time of any offering.
As of March 31, 2026 and December 31, 2025, our debt consisted of asset based leverage facilities, a revolving credit facility, unsecured note issuances and debt securitizations. We have and will continue to, from time to time, enter into additional credit facilities, increase the size of our existing credit facilities or issue further debt securities. Any such incurrence or issuance would be subject to prevailing market conditions, our liquidity requirements, contractual and regulatory restrictions and other factors. In accordance with the 1940 Act, with certain limited exceptions, we are only allowed to incur borrowings, issue debt securities or issue preferred stock, if immediately after the borrowing or issuance, the ratio of total assets (less total liabilities other than indebtedness) to total indebtedness plus preferred stock, is at least 150%. As of March 31, 2026 and December 31, 2025, we had an aggregate amount of $8.1 billion and $8.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 175.5% and 177.1%, respectively. We seek to carefully consider our unfunded commitments for the purpose of planning our ongoing financial leverage. Further, we maintain sufficient borrowing capacity within the 150% asset coverage limitation to cover any outstanding unfunded commitments we expect to be required to fund. From time to time we may also repurchase our outstanding debt. Such repurchases, if any, will depend on prevailing market conditions, our
liquidity requirements, contractual restrictions, and other factors. The amounts involved in any such purchase transactions, individually or in the aggregate, may be material.
Cash and cash equivalents (excluding restricted cash) as of March 31, 2026, taken together with our $2.1 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.0 billion is available to borrow) is expected to be sufficient for our investing activities and to conduct our operations in the near term. Additionally, we held $200.0 million of Level 1 and Level 2 investments as of March 31, 2026.
Although we have historically been able to obtain sufficient borrowing capacity, a deterioration in economic conditions or any other negative economic developments could restrict our access to financing in the future. We may not be able to find new financing for future investments or liquidity needs and, even if we are able to obtain such financing, such financing may not be on as favorable terms as we have previously obtained. These factors may limit our ability to make new investments and adversely impact our results of operations.
As of March 31, 2026, we had $351.3 million in cash and cash equivalents (including restricted cash). During the three months ended March 31, 2026, cash provided by operating activities was $249.3 million, which reflected an increase in net assets resulting from operations of $25.2 million, adjusted for $157.6 million of net unrealized depreciation of investments. Cash provided by operating activities was further driven by proceeds from sales of investments and principal repayments of $450.9 million, partially offset by purchases of investments of $324.8 million. Cash used in financing activities was $184.2 million during the period, which was primarily as a result of dividends paid in cash of $170.5 million and net repayments on debt of $12.9 million.
                  
Share Price [Table Text Block]
Financial Condition, Liquidity and Capital Resources
Our liquidity and capital resources are generated primarily from cash flows from interest, dividends and fees earned from our investments and principal repayments, our credit facilities, debt securitization transactions, and other secured and unsecured debt. We may also generate cash flow from operations, future borrowings and future offerings of securities including public or private issuances of debt or equity securities through both registered offerings and private offerings. The primary uses of our cash and cash equivalents are for (i) originating loans and purchasing senior secured debt investments, (ii) funding the costs of our operations (including fees paid to our Adviser and expense reimbursements paid to our Administrator), (iii) debt service, repayment and other financing costs of our borrowings and (iv) cash distributions to the holders of our Common Shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that was effective for a term of three years. In July 2025, we filed a new shelf registration statement with the SEC that is effective for a term of three years and expires in July 2028. The amount of securities to be issued pursuant to the shelf registration statement filed in July 2025 was not specified when it was filed and there is no specific dollar limit on the amount of securities we may issue. The securities covered by the registration statement filed in July 2025 include: (i) Common Shares; (ii) preferred shares; (iii) debt securities; (iv) subscription rights; and (v) warrants. The specifics of any future offerings, along with the use of proceeds of any securities offered, will be described in detail in a prospectus supplement, or other offering materials, at the time of any offering.
As of March 31, 2026 and December 31, 2025, our debt consisted of asset based leverage facilities, a revolving credit facility, unsecured note issuances and debt securitizations. We have and will continue to, from time to time, enter into additional credit facilities, increase the size of our existing credit facilities or issue further debt securities. Any such incurrence or issuance would be subject to prevailing market conditions, our liquidity requirements, contractual and regulatory restrictions and other factors. In accordance with the 1940 Act, with certain limited exceptions, we are only allowed to incur borrowings, issue debt securities or issue preferred stock, if immediately after the borrowing or issuance, the ratio of total assets (less total liabilities other than indebtedness) to total indebtedness plus preferred stock, is at least 150%. As of March 31, 2026 and December 31, 2025, we had an aggregate amount of $8.1 billion and $8.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 175.5% and 177.1%, respectively. We seek to carefully consider our unfunded commitments for the purpose of planning our ongoing financial leverage. Further, we maintain sufficient borrowing capacity within the 150% asset coverage limitation to cover any outstanding unfunded commitments we expect to be required to fund. From time to time we may also repurchase our outstanding debt. Such repurchases, if any, will depend on prevailing market conditions, our
liquidity requirements, contractual restrictions, and other factors. The amounts involved in any such purchase transactions, individually or in the aggregate, may be material.
Cash and cash equivalents (excluding restricted cash) as of March 31, 2026, taken together with our $2.1 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.0 billion is available to borrow) is expected to be sufficient for our investing activities and to conduct our operations in the near term. Additionally, we held $200.0 million of Level 1 and Level 2 investments as of March 31, 2026.
Although we have historically been able to obtain sufficient borrowing capacity, a deterioration in economic conditions or any other negative economic developments could restrict our access to financing in the future. We may not be able to find new financing for future investments or liquidity needs and, even if we are able to obtain such financing, such financing may not be on as favorable terms as we have previously obtained. These factors may limit our ability to make new investments and adversely impact our results of operations.
As of March 31, 2026, we had $351.3 million in cash and cash equivalents (including restricted cash). During the three months ended March 31, 2026, cash provided by operating activities was $249.3 million, which reflected an increase in net assets resulting from operations of $25.2 million, adjusted for $157.6 million of net unrealized depreciation of investments. Cash provided by operating activities was further driven by proceeds from sales of investments and principal repayments of $450.9 million, partially offset by purchases of investments of $324.8 million. Cash used in financing activities was $184.2 million during the period, which was primarily as a result of dividends paid in cash of $170.5 million and net repayments on debt of $12.9 million.
                  
NAV Per Share $ 26.26 $ 26.92 $ 27.39 $ 27.39            
Subscription Facility [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 0 $ 0   $ 0 $ 0 $ 0 $ 0 $ 0 $ 119,752 $ 0
Senior Securities Coverage per Unit $ 0 $ 0   $ 0 $ 0 $ 0 $ 0 $ 0 $ 2,151 $ 0
Jackson Hole Funding Facility [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 105,374 $ 22,374   $ 399,874 $ 233,019 $ 360,019 $ 361,007 $ 362,316 $ 514,151 $ 120,000
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 2,151 $ 2,278
Breckenridge Funding Facility [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 771,850 $ 652,550   $ 649,350 $ 741,700 $ 825,000 $ 568,680 $ 569,000 $ 820,311 $ 65,000
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 2,151 $ 2,278
Big Sky Funding Facility [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 520,400 $ 585,900   $ 400,000 $ 480,906 $ 499,606 $ 499,606 $ 200,346 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 0 $ 0
BXSL 2025-1 Facility [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 327,700 $ 34,800   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Revolving Credit Facility [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 1,392,991 $ 1,447,497   $ 1,287,140 $ 682,258 $ 678,378 $ 915,035 $ 182,901 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 0 $ 0
2023 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 0 $ 0   $ 0 $ 0 $ 400,000 $ 400,000 $ 400,000 $ 0 $ 0
Senior Securities Coverage per Unit $ 0 $ 0   $ 0 $ 0 $ 1,748 $ 1,802 $ 2,300 $ 0 $ 0
2026 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 0 $ 800,000   $ 800,000 $ 800,000 $ 800,000 $ 800,000 $ 800,000 $ 0 $ 0
Senior Securities Coverage per Unit $ 0 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 0 $ 0
New 2026 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 700,000 $ 700,000   $ 700,000 $ 700,000 $ 700,000 $ 700,000 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 0 $ 0 $ 0
2027 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 650,000 $ 650,000   $ 650,000 $ 650,000 $ 650,000 $ 650,000 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 0 $ 0 $ 0
2028 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 650,000 $ 650,000   $ 650,000 $ 650,000 $ 650,000 $ 650,000 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 2,003 $ 1,748 $ 1,802 $ 0 $ 0 $ 0
November 2027 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 400,000 $ 400,000   $ 400,000 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
April 2028 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 700,000 $ 700,000   $ 700,000 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
June 2030 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 500,000 $ 500,000   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
January 2031 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 500,000 $ 500,000   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
September 2029 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 400,000 $ 0   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 0   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
2024-1 Notes [Member]                    
Financial Highlights [Abstract]                    
Senior Securities Amount $ 457,500 $ 457,500   $ 457,500 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,755 $ 1,771   $ 1,857 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
v3.26.1
Significant Accounting Policies (Policies)
 3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]  
Basis of Presentation
Basis of Presentation
The condensed consolidated financial statements have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the requirements for reporting on Form 10-Q and Article 6 and 10 of Regulation S-X. Accordingly, certain disclosures accompanying the annual consolidated financial statements prepared in accordance with GAAP are omitted. As an investment company, the Company applies the accounting and reporting guidance in Accounting Standards Codification (“ASC”) Topic 946, Financial Services—Investment Companies (“ASC 946”) issued by the Financial Accounting Standards Board (“FASB”).
In the opinion of management, all adjustments considered necessary for the fair presentation of the condensed consolidated financial statements for the interim period presented have been included. The current period’s results of operations will not necessarily be indicative of results that ultimately may be achieved for the fiscal year ending December 31, 2026.
All intercompany balances and transactions have been eliminated.
Certain prior period information has been reclassified to conform to the current period presentation.
Use of Estimates
Use of Estimates
The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements. Such amounts could differ from those estimates and such differences could be material. Assumptions and estimates regarding the valuation of investments involve a higher degree of judgment and complexity and these assumptions and estimates may be significant to the condensed consolidated financial statements. Actual results may ultimately differ from those estimates.
Consolidation
Consolidation
As provided under ASC 946, the Company will not consolidate its investment in a company other than an investment company subsidiary or a controlled operating company whose business consists of providing services to the Company.
The Company consolidated the results of the Company’s wholly-owned subsidiaries which are considered to be investment companies. As of March 31, 2026, the Company’s consolidated subsidiaries were BGSL Jackson Hole Funding LLC (“Jackson Hole Funding”), BGSL Breckenridge Funding LLC (“Breckenridge Funding”), BGSL Big Sky Funding LLC (“Big Sky Funding”), BXSL CLO 2024-1 LLC (the “2024-1 Issuer”), BXSL CLO 2024-1 Depositor LLC, BXSL CLO 2025-1 LLC (“BXSL CLO 2025-1”), BGSL Investments LLC (“BGSL Investments”), BXSL Associates GP (Lux) S.à r.l, BXSL Direct Lending (Lux) SCSp, BXSL C-1 LLC, and BXSL C-2 Funding LLC.
Cash and Cash Equivalents
Cash and Cash Equivalents and Restricted Cash
Cash and cash equivalents consist of demand deposits and highly liquid investments, such as money market funds, with original maturities of three months or less. Cash and cash equivalents are carried at cost, which approximates fair value. The Company deposits its cash and cash equivalents with financial institutions which, at times, may exceed the Federal Deposit Insurance Corporation insured limit.
Cash Equivalents and Restricted Cash Restricted cash and cash equivalents include amounts that are collected and are held by trustees who have been appointed as custodians of the assets securing certain of the Company’s financing transactions. Restricted cash and cash equivalents are held by the trustees for payment of interest expense and principal on the outstanding borrowings or reinvestment into new assets.
Investments/Receivables/Payables From Investments Sold/Purchased
Investments
Investment transactions are recorded on a trade date basis.
Realized gains or losses are measured by the difference between the net proceeds received (excluding prepayment fees, if any) and the amortized cost basis of the investment using the specific identification method without regard to unrealized gains or losses previously recognized, and include investments charged off during the period, net of recoveries, and is recorded within Net realized gain (loss) on the Condensed Consolidated Statements of Operations.
The net change in unrealized gains or losses primarily reflects the change in investment values, including the reversal of previously recorded unrealized gains or losses with respect to investments realized during the period, and is recorded within Net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations.
Valuation of Investments
The Company is required to report its investments, including those for which current market values are not readily available, at fair value.
The Company values its investments in accordance with ASC 820, Fair Value Measurements (“ASC 820”), which defines fair value as the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the applicable measurement date, and Rule 2a-5 under the 1940 Act.
Under ASC 820, fair value is based on observable market prices or parameters or derived from such prices or parameters when such quotations are readily available. In accordance with Rule 2a-5 under the 1940 Act, fair value means the value of a portfolio investment for which market quotations are not readily available. A market quotation is “readily available” only when it is a quoted price (unadjusted) in active markets for identical instruments that a fund can access at the measurement date, provided that such a quotation is not considered to be readily available if it is not reliable.
Where prices or inputs are not available or, in the judgment of the Board of Trustees (the “Board” or the “Board of Trustees”), with assistance of the Advisers, the Audit Committee and independent valuation firm(s), determined to be not reliable, valuation techniques based on the facts and circumstances of the particular investment will be utilized. These valuation approaches involve some level of management estimation and judgment, the degree of which is dependent on the price transparency for the investments or market and the investments’ complexity. In the absence of observable, reliable market prices, the Company values its investments using various valuation methodologies applied on a consistent basis.
An enterprise value (“EV”) analysis is generally performed to determine the value of equity investments, control debt investments and non-control debt investments that are credit-impaired, and to determine if debt investments are credit-impaired. The Advisers will generally utilize approaches including the market approach, the income approach or both approaches, as appropriate, when calculating EV. The primary method for determining EV for non-control investments, and control investments without reliable projections, uses a multiple analysis whereby appropriate multiples are applied to the portfolio company’s earnings before interest, taxes, depreciation and amortization (“EBITDA”) or another key financial metric (e.g., such as revenues, cash flows or net income) (“Performance Multiple”). Performance Multiples are typically determined based upon a review of publicly-traded comparable companies and market comparable transactions, if any. The second method for determining EV (and primary method for control investments with reliable projections) uses a discounted cash flow analysis whereby future expected cash flows and the anticipated terminal value of the portfolio company are discounted to determine a present value using estimated discount rates. The income approach is generally used when the Advisers have visibility into the long-term projected cash flows of a portfolio company.
If debt investments are credit-impaired, which occurs when there is insufficient coverage under the enterprise value analysis through the respective investment’s position in the capital structure, the Advisers generally use the enterprise value “waterfall” approach or a recovery method (if a liquidation or restructuring is deemed likely) to determine fair value. For debt investments that are not determined to be credit-impaired, the Advisers generally use a market interest rate yield analysis to determine fair value. To determine fair value using a yield analysis, the expected cash flows are projected based on the contractual terms of the debt security and discounted back to the measurement date based on a market yield. A market yield is determined based upon an assessment of current and expected market yields for similar investments and risk profiles. The Company considers the current contractual interest rate, the maturity and other terms of the investment relative to risk of the company and the specific investment. A key determinant of risk, among other things, is the leverage through the investment relative to the enterprise value of the portfolio company. As debt investments held by the Company are substantially illiquid with no active transaction market, the Company depends on primary market data, including newly funded transactions, as well as secondary market data with respect to high yield debt instruments and syndicated loans, as inputs in determining the appropriate market yield, as applicable. The fair value of loans with call protection is generally capped at par plus applicable prepayment premium in effect at the measurement date.
ASC 820 prioritizes the use of observable market prices derived from such prices. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The levels used for classifying investments are not necessarily an indication of the risk associated with investing in these securities. The three levels of the fair value hierarchy are as follows:
•Level 1: Inputs to the valuation methodology are quoted prices available in active markets for identical instruments as of the reporting date. The types of financial instruments included in Level 1 may include unrestricted securities, including equities and derivatives, listed in active markets.
•Level 2: Inputs to the valuation methodology are other than quoted prices in active markets, which are either directly or indirectly observable as of the reporting date. The types of financial instruments in this category may include less liquid and restricted securities listed in active markets, securities traded in other than active markets, government and agency securities and certain over-the-counter derivatives where the fair value is based on observable inputs.
•Level 3: Inputs to the valuation methodology are unobservable and significant to overall fair value measurement. The inputs into the determination of fair value require significant management judgment or estimation. Financial instruments that are included in this category may include debt and equity investments in privately held entities, collateralized loan obligations (“CLOs”) and certain over-the-counter derivatives where the fair value is based on unobservable inputs.
In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment’s level within the fair value hierarchy is based on the lowest level of input that is significant to the overall fair value measurement. The Board’s assessment, with the assistance of the Advisers, the Audit Committee and independent valuation firm(s), of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Transfers between levels, if any, are recognized at the beginning of the quarter in which the transfer occurs.
The Company evaluates the source of the inputs, including any markets in which its investments are trading (or any markets in which securities with similar attributes are trading), in determining fair value. When an investment is valued based on prices provided by reputable dealers or pricing services (that is, broker quotes), the Company subjects those prices to various criteria in making the determination as to whether a particular investment would qualify for treatment as a Level 2 or Level 3 investment.
Due to the inherent uncertainty of determining the fair value of investments that do not have a readily available market value, the fair value of the Company’s investments may fluctuate from period to period, and these differences could be material. Additionally, the fair value of the Company’s investments may differ significantly from the values that would have been used had a ready market existed for such investments and may differ materially from the values that the Company may ultimately realize. Further, such investments are generally subject to legal and other restrictions on resale or otherwise are less liquid than publicly-traded securities. If the Company was required to liquidate a portfolio investment in a forced or liquidation sale, it could realize significantly less than the value at which the Company has recorded it. In addition, changes in the market environment and other events that may occur over the life of the investments may cause the gains or losses ultimately realized on these investments to be different than the unrealized gains or losses reflected in the valuations currently assigned. See “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Estimates.”
Receivables/Payables From Investments Sold/Purchased
Receivables/payables from investments sold/purchased consist of amounts receivable to or payable by the Company for transactions that have not settled at the reporting date.
Derivative Instruments/Forward Purchase Agreement
Derivative Instruments
The Company recognizes all derivative instruments as assets or liabilities at fair value in its Condensed Consolidated Statements of Assets and Liabilities as Derivative assets at fair value and Derivative liabilities at fair value, respectively.
In the normal course of business, the Company has commitments and risks resulting from its investment transactions, which may include those involving derivative instruments. Derivative instruments are measured in terms of the notional contract amount and derive their value based upon one or more underlying instruments. While the notional amount gives some indication of the Company’s derivative activity, it generally is not exchanged, but is only used as the basis on which interest and other payments are exchanged. Derivative instruments are subject to various risks similar to non-derivative instruments including market, credit, liquidity, and operational risks. The Company manages these risks on an aggregate basis as part of its risk management process.
From time to time, the Company may enter into forward currency contracts which is an obligation between two parties to purchase or sell a specific currency for an agreed-upon price at a future date. The Company utilizes forward currency contracts to economically hedge the currency exposure associated with certain foreign currency denominated assets and liabilities of the Company. The use of forward currency contracts does not eliminate fluctuations in the price of the underlying debt the Company has, but establishes a rate of exchange in advance. Fluctuations in the value of these contracts are measured by the difference in the exchange rates on the contract date and reporting date and are recorded as net change in unrealized appreciation (depreciation). The fair value of the foreign currency forwards is included as Derivative assets at fair value or Derivative liabilities at fair value on the Company’s Condensed Consolidated Statements of Assets and Liabilities. Changes in
the fair value of the foreign currency forwards are presented in Net change in unrealized appreciation (depreciation): Derivative instruments and Net realized gains (losses): Derivative instruments in the Condensed Consolidated Statements of Operations.
Additionally, the Company uses interest rate swaps to mitigate interest rate risk associated with the Company’s fixed rate liabilities. The fair value of the interest rate swaps is included as Derivative assets at fair value or Derivative liabilities at fair value on the Company’s Condensed Consolidated Statements of Assets and Liabilities. Changes in fair value of interest rate swaps entered into by the Company and not designated as hedging instruments are presented in Net realized gains (losses) and Net change in unrealized appreciation (depreciation) in the Condensed Consolidated Statements of Operations. The Company designated certain interest rate swaps as the hedging instrument in a qualifying fair value hedge accounting relationship, and therefore the change in fair value of the hedging instrument and hedged item are recorded in Interest expense and recognized as components of Interest expense in the Condensed Consolidated Statements of Operations. The change in fair value of the interest rate swap is offset by a change in the carrying value of the fixed rate debt.
The fair values of derivative instruments are presented on a net basis in the Condensed Consolidated Statements of Assets and Liabilities when they are with the same counterparty, the Company has determined it has a legal right to offset the recognized amounts, and it intends to either settle on a net basis. The Company has elected to offset cash collateral posted to or received from its counterparty against the net fair value of derivative instruments with that counterparty when an enforceable master netting agreement is in place that provides the Company, in the event of counterparty default, the right to liquidate collateral and the right to offset a counterparty’s rights and obligations.
Forward Purchase Agreement
Forward purchase agreements are recognized at fair value through current period gains or losses on the date on which the contract is entered into and are subsequently re-measured at fair value. All forward purchase agreements are carried as assets when fair value is positive and as liabilities when fair value is negative. A forward purchase agreement is derecognized when the obligation specified in the contract is discharged, canceled or expired.
Foreign Currency Transactions
Foreign Currency Transactions
Amounts denominated in foreign currencies are translated into U.S. dollars (“USD”) on the following basis: (i) investments and other assets and liabilities denominated in foreign currencies are translated into USD based upon currency exchange rates effective on the last business day of the period; and (ii) purchases and sales of investments, borrowings and repayments of such borrowings, income, and expenses denominated in foreign currencies are translated into USD based upon currency exchange rates prevailing on the transaction dates.
The Company includes net changes in fair values on investments held resulting from foreign exchange rate fluctuations in Translation of assets and liabilities in foreign currencies on the Condensed Consolidated Statements of Operations, if any. Foreign security and currency transactions may involve certain considerations and risks not typically associated with investing in U.S. companies and U.S. government securities. These risks include, but are not limited to, currency fluctuations and revaluations and future adverse political, social and economic developments, which could cause investments in foreign markets to be less liquid and prices more volatile than those of comparable U.S. companies or U.S. government securities.
Revenue Recognition
Revenue Recognition
Interest Income
Interest income is recorded on an accrual basis and includes the accretion of discounts and amortizations of premiums. Discounts from and premiums to par value on debt investments purchased are accreted/amortized into interest income over the life of the respective security using the effective interest method. The amortized cost of debt investments represents the original cost, including loan origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion of discounts and amortization of premiums, if any. Upon prepayment of a loan or debt security, any prepayment premiums, unamortized upfront loan origination fees and unamortized discounts are recorded as interest income in the current period. For the three months ended March 31, 2026 and 2025, the Company recorded $2.5 million and $12.9 million, respectively, in non-recurring interest income (e.g., prepayment premiums, accelerated accretion of upfront loan origination fees and unamortized discounts).
PIK Income
The Company has investments in its portfolio that contain payment-in-kind (“PIK”) provisions. PIK represents interest that is accrued and recorded as interest income at the contractual rates, increases the loan principal on the respective capitalization dates, and is generally due at maturity. Such income is included in Payment-in-kind interest income in the Condensed Consolidated Statements of Operations. If at any point the Company expects that PIK will not be realized, the investment generating PIK will be placed on non-accrual status. When a PIK investment is placed on non-accrual status, the accrued, uncapitalized interest is generally reversed through Payment-in-kind interest income. To satisfy the Company’s annual RIC distribution requirements, this non-cash source of income must be included in determining the amounts to be paid out to shareholders in the form of dividends, even though the Company has not yet collected cash.
Dividend Income
Dividend income on preferred equity securities is recorded on an accrual basis to the extent that such amounts are payable by the portfolio company and are expected to be collected. Dividend income on common equity securities is recorded on the record date for private portfolio companies or on the ex-dividend date for publicly-traded portfolio companies.
Other Income
The Company may receive various fees in the ordinary course of business such as structuring, consent, waiver, amendment, syndication and other miscellaneous fees, as well as fees for managerial assistance rendered by the Company to the portfolio companies. Such fees are recognized as income when earned or the services are rendered.
Non-Accrual Income
Loans are generally placed on non-accrual status when there is reasonable doubt whether principal or interest will be collected in full. Accrued interest is generally reversed when a loan is placed on non-accrual status. Additionally, any original issue discount and market discount are no longer accreted to interest income as of the date the loan is placed on non-accrual status. Interest payments received on non-accrual loans may be recognized as income or applied to principal depending upon management’s judgment regarding collectability. Non-accrual loans are restored to accrual status when past due principal and interest is paid current and, in management’s judgment, are likely to remain current. Management may make exceptions to this treatment and determine to not place a loan on non-accrual status if the loan has sufficient collateral value and is in the process of collection.
For further information regarding the non-accrual status of investments, refer to “Note 4. Investments.”
Offering Expenses
Offering Expenses
The Company records expenses related to public equity offerings as a reduction of capital upon completion of an offering of registered securities. The costs associated with any renewals of a shelf registration statement will be expensed as incurred.
Deferred Financing Costs and Debt Issuance Costs
Deferred Financing Costs and Debt Issuance Costs
Deferred financing and debt issuance costs represent fees and other direct incremental costs incurred in connection with the Company’s borrowings and debt issuance costs include premiums and discounts to the par value of the respective instruments. These expenses and adjustments are deferred and amortized into interest expense over the life of the related debt instrument. Deferred financing costs related to revolving credit facilities are presented separately as an asset on the Company’s Condensed Consolidated Statements of Assets and Liabilities. Debt issuance costs, including premiums and discounts to par, related to any issuance of installment debt or notes are presented net against the outstanding debt balance of the related security.
Income Taxes
Income Taxes
The Company has elected to be treated as a BDC under the 1940 Act. The Company also has elected to be treated as a RIC under the Code. So long as the Company maintains its tax treatment as a RIC, it generally will not pay corporate-level U.S. federal income taxes on any ordinary income or capital gains that it distributes at least annually to its shareholders as dividends. Rather, any tax liability related to income earned and distributed by the Company would represent obligations of the Company’s investors and would not be reflected in the condensed consolidated financial statements of the Company.
The Company evaluates tax positions taken or expected to be taken in the course of preparing its condensed consolidated financial statements to determine whether the tax positions are “more-likely-than-not” to be sustained by the applicable tax authority. Tax positions not deemed to meet the “more-likely-than-not” threshold are reserved and recorded as a tax benefit or expense in the current year. All penalties and interest associated with income taxes are included in income tax expense. Conclusions regarding tax positions are subject to review and may be adjusted at a later date based on factors including, but not limited to, on-going analyses of tax laws, regulations and interpretations thereof. Management has analyzed the Company’s tax positions taken, or to be taken, on federal income tax returns for all open tax years, and has concluded that there are no material uncertain tax positions through March 31, 2026. As applicable, the Company’s federal tax returns are subject to examination by the Internal Revenue Service for a period of three fiscal years after they are filed.
To qualify for and maintain qualification as a RIC, the Company must, among other things, meet certain source-of-income and asset diversification requirements. In addition, to qualify for RIC tax treatment, the Company must distribute to its shareholders, for each taxable year, at least 90% of the sum of (i) its “investment company taxable income” for that year (without regard to the deduction for dividends paid), which is generally its ordinary income plus the excess, if any, of its realized net short-term capital gains over its realized net long-term capital losses and (ii) its net tax-exempt income.
In addition, based on the excise tax distribution requirements, the Company is subject to a 4% nondeductible federal excise tax on certain undistributed income unless the Company distributes in a timely manner in each taxable year an amount at least equal to the sum of (i) 98% of its ordinary income for the calendar year, (ii) 98.2% of its capital gain net income (both long-term and short-term) for the one-year period ending October 31 in that calendar year and (iii) any income realized, but not distributed, in prior years. For this purpose, however, any ordinary income or capital gain net income retained by the Company that is subject to corporate income tax is considered to have been distributed.
For the three months ended March 31, 2026 and 2025, the Company accrued $4.1 million and $4.2 million, respectively, of U.S. federal excise tax.
Certain of the Company’s consolidated subsidiaries are subject to certain U.S. federal and state income taxes. Income tax expense, if any, is included under the income category for which it applies in the Condensed Consolidated Statements of Operations.
Distributions
Distributions
To the extent that the Company has taxable income available, the Company intends to make quarterly distributions to its shareholders. Distributions to shareholders are recorded on the record date. All distributions will be paid at the discretion of the Board and will depend on the Company’s earnings, financial condition, maintenance of the Company’s tax treatment as a RIC, compliance with applicable BDC regulations and such other factors as the Board may deem relevant from time to time.
Segment Reporting
Segment Reporting
The Company operates as a single reportable segment and as a result, the Company’s segment accounting policies are consistent with those described herein and the Company does not have any intra-segment sales and transfers of assets. See “Note 12. Segment Reporting” for further information.
Recent Accounting Pronouncements
Recent Accounting Pronouncements
In December 2025, the FASB issued Accounting Standards Update (“ASU”) 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements,” (“ASU 2025-09”). ASU 2025-09 amends the guidance in ASU 815, Derivatives and Hedging and refines certain hedge accounting requirements, including clarifications to the designation and documentation criteria for hedge relationships, improvements to the assessment of hedge effectiveness, and enhanced disclosures intended to provide greater transparency into an entity's risk management activities involving derivatives. ASU 2025-09 is effective for annual periods beginning after December 15, 2026, including interim periods within those annual periods, and early adoption is permitted. The Company has not early adopted and does not expect the adoption of ASU 2025-09 to have a material impact on its condensed consolidated financial statements.
Fair Value Measurements
The significant unobservable input used in the yield analysis is the discount rate based on comparable market yields. Significant increases in discount rates would result in a significantly lower fair value measurement. The significant unobservable input used for market quotations are broker quoted prices provided by independent pricing services. The significant unobservable input used under the market approach is the Performance Multiple. The significant unobservable inputs used under the asset recoverability approach are the market multiple and discount rate. Significant decreases in quoted prices, Performance Multiples, or market multiples would result in a significantly lower fair value measurement. The significant input used in the option pricing model is expected volatility. Significant increases or decreases in expected volatility could result in a significantly higher or significantly lower fair market value measurement, respectively.
v3.26.1
Investments (Tables)
 3 Months Ended
Mar. 31, 2026
Schedule of Investments [Abstract]  
Schedule of Investments
The composition of the Company’s investment portfolio at cost and fair value was as follows:
March 31, 2026December 31, 2025
CostFair Value% of Total Investments at Fair ValueCostFair Value% of Total Investments at Fair Value
First lien debt$13,973,977 $13,609,017 97.6 %$14,066,122 $13,866,434 97.6 %
Second lien debt233,536 228,827 1.6 232,448 231,650 1.6 
Unsecured debt13,992 12,502 0.1 13,049 12,278 0.1 
Equity75,416 91,794 0.7 76,348 96,932 0.7 
Total$14,296,921 $13,942,140 100.0 %$14,387,967 $14,207,294 100.0 %
The industry composition of investments at fair value was as follows:
March 31, 2026December 31, 2025
Aerospace & Defense4.2 %4.1 %
Air Freight & Logistics1.2 1.9 
Automobile Components (2)
— 0.0 
March 31, 2026December 31, 2025
Biotechnology1.1 %1.1 %
Building Products1.4 1.3 
Chemicals0.3 0.3 
Commercial Services & Supplies8.2 8.0 
Construction & Engineering1.4 1.2 
Consumer Staples Distribution & Retail (1)(2)
0.0 0.0 
Containers & Packaging0.2 0.2 
Distributors1.9 2.1 
Diversified Consumer Services4.2 4.2 
Diversified Telecommunication Services0.1 0.1 
Electric Utilities1.5 1.4 
Electrical Equipment1.4 1.4 
Electronic Equipment, Instruments & Components2.2 2.1 
Energy Equipment & Services0.2 0.2 
Financial Services0.5 0.4 
Ground Transportation0.1 0.1 
Health Care Equipment & Supplies0.4 0.4 
Health Care Providers & Services9.7 9.5 
Health Care Technology4.4 5.6 
Insurance9.3 9.3 
Interactive Media & Services0.7 0.3 
IT Services4.3 4.3 
Life Sciences Tools & Services0.9 0.8 
Machinery0.3 0.3 
Marine Transportation0.5 0.4 
Media0.5 0.6 
Oil, Gas & Consumable Fuels0.5 0.5 
Paper & Forest Products0.1 0.1 
Pharmaceuticals0.4 0.4 
Professional Services9.9 9.7 
Real Estate Management & Development1.5 1.4 
Software20.7 20.5 
Specialty Retail1.3 1.3 
Technology Hardware, Storage & Peripherals0.5 0.6 
Trading Companies & Distributors0.8 0.9 
Transportation Infrastructure3.0 2.9 
Wireless Telecommunication Services0.2 0.1 
Total100.0 %100.0 %
(1)Amount rounds to less than 0.1% as of March 31, 2026.
(2)Amount rounds to less than 0.1% as of December 31, 2025.
The geographic composition of investments at cost and fair value was as follows:
March 31, 2026
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$12,300,117 $11,919,845 85.5 %195.4 %
Europe1,687,271 1,710,103 12.2 28.1 
Canada149,780 151,492 1.1 2.5 
Bermuda/Cayman Islands147,876 148,611 1.1 2.4 
Asia11,877 12,089 0.1 0.2 
Total$14,296,921 $13,942,140 100.0 %228.6 %
December 31, 2025
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$12,488,551 $12,259,789 86.3 %196.3 %
Europe1,601,031 1,645,999 11.6 26.3 
Bermuda/Cayman Islands148,220 148,966 1.0 2.4 
Canada138,265 140,444 1.0 2.3 
Asia11,900 12,096 0.1 0.2 
Total$14,387,967 $14,207,294 100.0 %227.5 %
v3.26.1
Fair Value Measurements (Tables)
 3 Months Ended
Mar. 31, 2026
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets Measured on Recurring Basis
The following tables present the fair value hierarchy of financial instruments:
March 31, 2026
Level 1Level 2Level 3Total
First lien debt$— $199,598 $13,409,419 $13,609,017 
Second lien debt— — 228,827 228,827 
Unsecured debt— — 12,502 12,502 
Equity405 — 91,389 91,794 
Total$405 $199,598 $13,742,137 $13,942,140 
December 31, 2025
Level 1Level 2Level 3Total
First lien debt$— $106,617 $13,759,817 $13,866,434 
Second lien debt— — 231,650 231,650 
Unsecured debt— — 12,278 12,278 
Equity438 — 96,494 96,932 
Total$438 $106,617 $14,100,239 $14,207,294 
Schedule of Changes in Fair Value of Investments Measured Using Level 3 Inputs
The following tables present changes in the fair value of financial instruments for which Level 3 inputs were used to determine the fair value:
Three Months Ended March 31, 2026
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal
Fair value, beginning of period$13,759,817 $231,650 $12,278 $96,494 $14,100,239 
Purchases of investments343,921 2,468 934 2 347,325 
Proceeds from principal repayments and sales of investments(445,638)(1,500)— (1,857)(448,995)
Accretion of discount (amortization of premium)10,912 120 9 — 11,041 
Net realized gain (loss)130 — — 924 1,054 
Net change in unrealized appreciation (depreciation)(163,340)(3,911)(719)(4,174)(172,144)
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
(96,383)— — — (96,383)
Fair value, end of period$13,409,419 $228,827 $12,502 $91,389 $13,742,137 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of March 31, 2026 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$(162,672)$(3,911)$(719)$(3,565)$(170,867)
Three Months Ended March 31, 2025
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal
Fair value, beginning of period$12,714,636 $119,184 $33,521 $109,424 $12,976,765 
Purchases of investments715,298 1,663 468 168 717,597 
Proceeds from principal repayments and sales of investments(964,827)(2,347)(20,595)(10,224)(997,993)
Accretion of discount (amortization of premium)16,001 74 10 — 16,085 
Net realized gain (loss)1,210 (1)— 7,316 8,525 
Net change in unrealized appreciation (depreciation)(9,399)(91)254 (7,521)(16,757)
Transfers into Level 3 (1)
225 — — — 225 
Transfers out of Level 3 (1)
(102,175)— — — (102,175)
Fair value, end of period$12,370,969 $118,482 $13,658 $99,163 $12,602,272 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of March 31, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$(5,329)$(91)$(16)$(2,969)$(8,405)
For the three months ended March 31, 2026 and 2025, transfers into or out of Level 3 were primarily due to decreased or increased price transparency.
Schedule of Fair Value Measurement Inputs and Valuation Techniques
The following tables present quantitative information about the significant unobservable inputs of the Company’s Level 3 financial instruments. These tables are not intended to be all-inclusive but instead capture the significant unobservable inputs relevant to the Company’s determination of fair value.
March 31, 2026
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$13,129,390 Yield AnalysisDiscount Rate7.14 %22.06 %9.75 %
272,530 Asset RecoverabilityMarket Multiple5.00x12.50x8.80x
7,499 Market QuotationsBroker quoted price92.89100.2598.17
13,409,419 
Investments in second lien debt228,827 Yield AnalysisDiscount Rate8.64 %15.84 %10.24 %
Investments in unsecured debt12,502 Yield AnalysisDiscount Rate16.10 %16.10 %16.10 %
Investments in equity58,543 Market ApproachPerformance Multiple6.00x33.63x11.96x
19,562 Yield AnalysisDiscount Rate11.67 %21.71 %16.69 %
11,434 Option Pricing Model Expected Volatility32.00 %70.50 %33.51 %
1,850 Asset RecoverabilityMarket Multiple8.50x16.00x11.90x
91,389 
Total$13,742,137 
December 31, 2025
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$13,198,498 Yield AnalysisDiscount Rate6.94 %19.36 %9.44 %
462,825 Asset RecoverabilityMarket Multiple7.25x12.47x11.23x
98,494 Market QuotationsBroker quoted price97.25100.0099.97
13,759,817 
Investments in second lien debt231,650 Yield AnalysisDiscount Rate8.45 %15.78 %10.11 %
Investments in unsecured debt12,278 Yield AnalysisDiscount Rate15.10 %15.10 %15.10 %
Investments in equity62,579 Market ApproachPerformance Multiple6.40x33.63x12.28x
19,678 Yield AnalysisDiscount Rate12.50 %19.50 %15.08 %
11,235 Option Pricing ModelExpected Volatility32.00 %70.50 %33.34 %
3,002 Asset RecoverabilityMarket Multiple8.50x16.00x11.22x
96,494 
Total$14,100,239 
(1)Weighted averages are calculated based on fair value of investments.
Schedule of Fair Value Measurements of Unsecured Notes
The following table presents the fair value measurements of the Company’s Unsecured Notes and Debt Securitization Notes (as defined in Note 7) had they been accounted for at fair value. These financial instruments would be categorized as Level 3 within the fair value hierarchy as of March 31, 2026 and December 31, 2025.
March 31, 2026December 31, 2025
Fair ValueFair Value
2026 Notes$— $799,357 
New 2026 Notes690,577 691,950 
2027 Notes631,721 632,710 
March 31, 2026December 31, 2025
Fair ValueFair Value
2028 Notes$604,234 $615,550 
November 2027 Notes401,157 408,680 
April 2028 Notes695,121 706,370 
June 2030 Notes484,410 497,550 
January 2031 Notes479,447 494,000 
September 2029 Notes391,905 — 
2024-1 Notes457,456 457,450 
Total$4,836,028 $5,303,617 
v3.26.1
Derivatives (Tables)
 3 Months Ended
Mar. 31, 2026
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments
The following tables present the aggregate notional amount and fair value hierarchy of the Company’s derivative financial instruments as of March 31, 2026 and December 31, 2025:
March 31, 2026
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $2,252 $— $2,252 $231,878 
Interest rate swaps— 29,016 — 29,016 1,600,000 
Total Derivative assets at fair value$— $31,268 $— $31,268 $1,831,878 
Derivative Liabilities
Foreign currency forward contracts$— $— $— $— $— 
Interest rate swaps— (8,723)— (8,723)900,000 
Total Derivative liabilities at fair value$— $(8,723)$— $(8,723)$900,000 
Cash collateral posted$1,821 
December 31, 2025
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $137 $— $137 $78,873 
Interest rate swaps— 22,207 — 22,207 1,600,000 
Total Derivative assets at fair value$— $22,344 $— $22,344 $1,678,873 
Derivative Liabilities
Foreign currency forward contracts$— $(822)$— $(822)$143,979 
Interest rate swaps— (1,889)— (1,889)500,000 
Total Derivative liabilities at fair value$— $(2,711)$— $(2,711)$643,979 
Cash collateral posted$11,286 
The net realized gains and losses on the derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship are included within Net realized gain (loss) on derivative instruments in the Condensed Consolidated Statements of Operations.
For the Three Months Ended March 31,
20262025
Unrealized appreciation (depreciation)
Foreign currency forward contracts$2,943 $(1,921)
Net change in unrealized appreciation (depreciation)$2,943 $(1,921)
Realized gain (loss)
Foreign currency forward contracts$1,842 $(2,055)
Net realized gain (loss)$1,842 $(2,055)
For the Three Months Ended March 31,
20262025
Interest rate swaps$(18,839)$15,409 
Hedged items$19,498 $(14,285)
The table below presents the carrying value of unsecured borrowings as of March 31, 2026 and December 31, 2025 that are designated in a qualifying hedging relationship and the related cumulative hedging adjustment (increase/(decrease)) from current and prior hedging relationships included in such carrying values:
March 31, 2026December 31, 2025
DescriptionCarrying ValueCumulative Hedging AdjustmentsCarrying ValueCumulative Hedging Adjustments
Unsecured notes$2,468,160 $(90)$2,091,290 $19,408 
Schedule of Offsetting Assets
The Company has elected to offset cash collateral posted to or received from its counterparty against the net fair value of derivative instruments with that counterparty. The following tables present the offsetting of the Company’s derivative financial instruments as of March 31, 2026 and December 31, 2025:
As of March 31, 2026
CounterpartyDerivative Assets Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Asset
Cash Collateral Received (1)
Cash Collateral Received Not Offset (2)
SMBC Capital Markets, Inc.$11,205 $— $— $11,205 $— $— 
Wells Fargo Bank, N.A.20,063 (8,723)— 11,340 — — 
$31,268 $(8,723)$— $22,545 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,821 $1,821 
Wells Fargo Bank, N.A.(8,723)8,723 — — — — 
$(8,723)$8,723 $— $— $1,821 $1,821 
As of December 31, 2025
CounterpartyDerivative Assets Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Asset
Cash Collateral Received (1)
Cash Collateral Received Not Offset (2)
SMBC Capital Markets, Inc.$8,251 $— $— $8,251 $— $— 
Wells Fargo Bank, N.A.14,093 (2,711)— 11,382 — — 
$22,344 $(2,711)$— $19,633 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,805 $1,805 
Wells Fargo Bank, N.A.(2,711)2,711 — — 9,481 9,481 
$(2,711)$2,711 $— $— $11,286 $11,286 
(1)No non-cash collateral has been posted to or received from counterparties related to derivative assets or derivative liabilities.
(2)Cash collateral posted to or received from counterparties has been offset against the derivative position with those counterparties to the extent an amount is available to be offset. Cash collateral posted to or received from counterparties in excess of the net derivative positions and not offset is recorded in the Condensed Consolidated Statements of Assets and Liabilities as Receivable from Broker or Payable to Broker, respectively.
Schedule of Offsetting Liabilities
The Company has elected to offset cash collateral posted to or received from its counterparty against the net fair value of derivative instruments with that counterparty. The following tables present the offsetting of the Company’s derivative financial instruments as of March 31, 2026 and December 31, 2025:
As of March 31, 2026
CounterpartyDerivative Assets Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Asset
Cash Collateral Received (1)
Cash Collateral Received Not Offset (2)
SMBC Capital Markets, Inc.$11,205 $— $— $11,205 $— $— 
Wells Fargo Bank, N.A.20,063 (8,723)— 11,340 — — 
$31,268 $(8,723)$— $22,545 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,821 $1,821 
Wells Fargo Bank, N.A.(8,723)8,723 — — — — 
$(8,723)$8,723 $— $— $1,821 $1,821 
As of December 31, 2025
CounterpartyDerivative Assets Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Asset
Cash Collateral Received (1)
Cash Collateral Received Not Offset (2)
SMBC Capital Markets, Inc.$8,251 $— $— $8,251 $— $— 
Wells Fargo Bank, N.A.14,093 (2,711)— 11,382 — — 
$22,344 $(2,711)$— $19,633 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,805 $1,805 
Wells Fargo Bank, N.A.(2,711)2,711 — — 9,481 9,481 
$(2,711)$2,711 $— $— $11,286 $11,286 
(1)No non-cash collateral has been posted to or received from counterparties related to derivative assets or derivative liabilities.
(2)Cash collateral posted to or received from counterparties has been offset against the derivative position with those counterparties to the extent an amount is available to be offset. Cash collateral posted to or received from counterparties in excess of the net derivative positions and not offset is recorded in the Condensed Consolidated Statements of Assets and Liabilities as Receivable from Broker or Payable to Broker, respectively.
v3.26.1
Borrowings (Tables)
 3 Months Ended
Mar. 31, 2026
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Instruments
The following table presents information on the secured notes issued and the secured loans incurred in the 2024-1 Debt Securitization:
March 31, 2026
DescriptionTypePrincipal OutstandingInterest RateCredit Rating
Class A Notes (2)
Senior Secured Floating Rate$— SOFR + 1.51%Aaa
Class A-L Loans (2)
Senior Secured Floating Rate412,500 SOFR + 1.51%Aaa
Class B NotesSenior Secured Floating Rate45,000 SOFR + 1.78%Aa2
Class C Notes (1)
Mezzanine Secured Deferrable Floating Rate52,500 SOFR + 2.00%A2
Total Secured Notes510,000 
Subordinated Notes (1)
Subordinated236,770 NoneNot Rated
Total 2024-1 Notes$746,770 None
(1)The Company retained all of the Class C Notes and the Subordinated Notes issued in the 2024-1 Debt Securitization which are eliminated in consolidation.
(2)Upon a conversion of the Class A-L Loans in accordance with the Indenture and the Class A-L Loan Agreement, the Aggregate Outstanding Amount of the Class A Notes may be increased by up to $412.5 million and the Aggregate Outstanding Amount of the Class A-L Loans reduced by a corresponding amount.
The Company’s outstanding debt obligations were as follows:
March 31, 2026
Aggregate Principal CommittedOutstanding PrincipalCarrying Value (net of unamortized issuance costs, premiums and discounts)Unamortized Debt Issuance Costs (including premiums and discounts)
Unused Portion (1)
Amount Available (2)
Jackson Hole Funding Facility (3)
$500,000 $105,374 $105,374 $— $394,626 $254,563 
Breckenridge Funding Facility1,175,000 771,850 771,850 — 403,150 403,150 
Big Sky Funding Facility650,000 520,400 520,400 — 129,600 129,600 
BXSL 2025-1 Facility400,000 327,700 327,700 — 72,300 72,300 
Revolving Credit Facility (4)
2,525,000 1,392,991 1,392,991 — 1,132,009 1,132,009 
New 2026 Notes700,000 700,000 699,184 816 — — 
2027 Notes650,000 650,000 647,589 2,411 — — 
2028 Notes650,000 650,000 645,300 4,700 — — 
November 2027 Notes (5)
400,000 400,000 401,101 3,292 — — 
April 2028 Notes (5)
700,000 700,000 695,894 5,447 — — 
June 2030 Notes (5)
500,000 500,000 494,472 8,998 — — 
January 2031 Notes (5)
500,000 500,000 487,076 8,200 — — 
September 2029 Notes (5)
400,000 400,000 389,617 5,814 — — 
2024-1 Notes457,500 457,500 455,338 2,162 — — 
Total$10,207,500 $8,075,815 $8,033,886 $41,840 $2,131,685 $1,991,622 
(1)The unused portion is the amount upon which commitment fees, if any, are based.
(2)The amount available reflects any limitations related to each respective credit facility’s borrowing base.
(3)Under the Jackson Hole Funding Facility, the Company may borrow in USD or certain other permitted currencies. As of March 31, 2026, the Company had no borrowings denominated in currencies other than USD.
(4)Under the Revolving Credit Facility, the Company may borrow in USD or certain other permitted currencies. As of March 31, 2026, the Company had non-USD borrowings denominated in the following currencies:
•CAD 38.4 million
•EUR 469.5 million
•GBP 293.5 million
•AUD 1.0 million
(5)Carrying value is inclusive of adjustment for the change in fair value of effective hedge relationship.
December 31, 2025
Aggregate Principal CommittedOutstanding PrincipalCarrying ValueUnamortized Debt Issuance Costs
Unused Portion (1)
Amount Available (2)
Jackson Hole Funding Facility (3)
$500,000 $22,374 $22,374 $— $477,626 $477,626 
Breckenridge Funding Facility1,175,000 652,550 652,550 — 522,450 418,348 
Big Sky Funding Facility650,000 585,900 585,900 — 64,100 64,100 
BXSL 2025-1 Facility400,000 34,800 34,800 — 365,200 351,400 
Revolving Credit Facility (4)
2,425,000 1,447,497 1,447,497 — 977,503 977,503 
2026 Notes800,000 800,000 799,936 64 — — 
New 2026 Notes700,000 700,000 698,746 1,254 — — 
2027 Notes650,000 650,000 646,911 3,089 — — 
2028 Notes650,000 650,000 644,837 5,163 — — 
November 2027 Notes (5)
400,000 400,000 403,760 3,803 — — 
April 2028 Notes (5)
700,000 700,000 700,057 6,107 — — 
June 2030 Notes (5)
500,000 500,000 497,626 9,520 — — 
January 2031 Notes (5)
500,000 500,000 489,847 8,688 — — 
2024-1 Notes457,500 457,500 455,288 2,212 — — 
Total$10,507,500 $8,100,621 $8,080,129 $39,900 $2,406,879 $2,288,977 
(1)The unused portion is the amount upon which commitment fees, if any, are based.
(2)The amount available reflects any limitations related to each respective credit facility’s borrowing base.
(3)Under the Jackson Hole Funding Facility, the Company may borrow in USD or certain other permitted currencies. As of December 31, 2025, the Company had no borrowings denominated in currencies other than USD.
(4)Under the Revolving Credit Facility, the Company may borrow in USD or certain other permitted currencies. As of December 31, 2025, the Company had non-USD borrowings denominated in the following currencies:
•CAD 30.7 million
•EUR 417.2 million
•GBP 293.5 million
•AUD 1.0 million
(5)Carrying value is inclusive of adjustment for the change in fair value of effective hedge relationship.
The components of interest expense were as follows:
Three Months Ended March 31,
20262025
Borrowing interest expense$93,283 $87,640 
Facility unused fees2,160 1,701 
Amortization of deferred financing costs1,450 1,409 
Amortization of original issue discount and debt issuance costs (including premiums and discounts)3,935 3,350 
Gain (loss) from interest rate swaps accounted for as hedges and the related hedged items:
Interest rate swaps18,839 (15,409)
Hedged items(19,498)14,285 
Total interest expense$100,169 $92,976 
Cash paid for interest expense$115,628 $96,301 
Schedule Of Assets And Liabilities, Collateral Management Agreement
The following presents the assets and liabilities of the 2024-1 Issuer, after giving effect to the elimination of intercompany balances. The assets of the 2024-1 Issuer are restricted to be used to settle the obligations of 2024-1 Issuer. The liabilities of the 2024-1 Issuer are only the obligations of the 2024-1 Issuer and the creditors (or beneficial interest holders) do not have recourse to the Company.
 March 31, 2026December 31, 2025
ASSETS
Investments at fair value
Non-controlled/non-affiliated investments$717,480 $727,232 
Total investments at fair value
717,480 727,232 
Cash and cash equivalents (restricted cash of $75,966 and $89,406, respectively)
75,966 89,406 
Interest receivable from non-controlled/non-affiliated investments
5,242 9,291 
Total assets$798,688 $825,929 
LIABILITIES
Debt (net of unamortized debt issuance costs of $2,162 and $2,212, respectively)
$455,338 $455,288 
Interest payable
4,696 5,029 
Total liabilities$460,034 $460,317 
Schedule of Maturities of Long-Term Debt
The following tables summarize the contractual maturities of the Company’s outstanding principal as of March 31, 2026 and December 31, 2025:
March 31, 2026
Less than 1 Year1 - 3 Years3 - 5 YearsGreater than 5 YearsTotal
SPV Financing Facilities$— $953,474 $771,850 $— $1,725,324 
Revolving Credit Facility— — 1,392,991 — 1,392,991 
Unsecured Notes1,350,000 1,750,000 1,400,000 — 4,500,000 
Debt Securitizations— — — 457,500 457,500 
Total outstanding principal$1,350,000 $2,703,474 $3,564,841 $457,500 $8,075,815 
December 31, 2025
Less than 1 Year1 - 3 Years3 - 5 YearsGreater than 5 YearsTotal
SPV Financing Facilities$— $643,074 $652,550 $— $1,295,624 
Revolving Credit Facility— — 1,447,497 — 1,447,497 
Unsecured Notes1,500,000 2,400,000 500,000 500,000 4,900,000 
Debt Securitizations— — — 457,500 457,500 
Total outstanding principal$1,500,000 $3,043,074 $2,600,047 $957,500 $8,100,621 
v3.26.1
Net Assets (Tables)
 3 Months Ended
Mar. 31, 2026
Equity [Abstract]  
Schedule of Shares Issued and Proceeds Received
The following table summarizes the total Common Shares issued and proceeds received, for the three months ended March 31, 2025, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering ExpensesNet Proceeds
Average Share Price (1)
“At-the-market” Offering5,761,648 $186,697 $1,867 $184,830 $32.08 
(1)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
Schedule of Dividends Declared
The following table summarizes the Company’s distributions declared and payable for the three months ended March 31, 2026 (dollars in thousands except per share amounts):
Date DeclaredRecord DatePayment DatePer Share AmountTotal Amount
February 25, 2026March 31, 2026April 24, 2026$0.7700 $178,855 
Total distributions$0.7700 $178,855 
The following table summarizes the Company’s distributions declared and payable for the three months ended March 31, 2025 (dollars in thousands except per share amounts):
Date DeclaredRecord DatePayment DatePer Share AmountTotal Amount
February 26, 2025March 31, 2025April 25, 2025$0.7700 $175,421 
Total distributions$0.7700 $175,421 
Schedule of Amounts Received and Shares Issued To Shareholders
Pursuant to the DRIP, the following table summarizes the amounts and shares issued to shareholders who have not opted out of the DRIP during the three months ended March 31, 2026 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 23, 2026$8,114 310,753 
Total distributions$8,114 310,753 
The following table summarizes the amounts and shares issued to shareholders who have not opted out of the DRIP during the three months ended March 31, 2025 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 24, 2025$5,130 165,096 
Total distributions$5,130 165,096 
v3.26.1
Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2026
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share:
Three Months Ended March 31,
20262025
Net increase (decrease) in net assets resulting from operations$25,246 $149,809 
Weighted average shares outstanding (basic and diluted)232,203,849 226,577,167 
Earnings (loss) per common share (basic and diluted)$0.11 $0.66 
v3.26.1
Financial Highlights and Senior Securities (Tables)
 3 Months Ended
Mar. 31, 2026
Investment Company [Abstract]  
Schedule of Financial Highlights
The following are the financial highlights for the three months ended March 31, 2026 and 2025:
Three Months Ended March 31,
 20262025
Per Share Data (1):
Net asset value, beginning of period$26.92 $27.39 
Net investment income
0.77 0.83 
Net change in unrealized and realized gain (loss)
(0.66)(0.17)
Net increase (decrease) in net assets resulting from operations0.11 0.66 
Distributions from net investment income (2)
(0.77)(0.77)
Net increase (decrease) in net assets from capital share transactions— 0.11 
Total increase (decrease) in net assets(0.66)0.00 
Net asset value, end of period$26.26 $27.39 
Market value, end of period
$23.69 $32.36 
Shares outstanding, end of period232,279,811 227,818,928 
Total return based on NAV (3)
0.7 %2.8 %
Total return based on market value (4)
(7.4)%2.6 %
Ratios:
Ratio of net expenses to average net assets (5)
9.2 %10.5 %
Ratio of net investment income to average net assets (5)
11.6 %12.2 %
Portfolio turnover rate2.3 %5.3 %
Supplemental Data:
Net assets, end of period$6,099,680$6,240,869
Asset coverage ratio175.5 %184.2 %
(1)The per share data was derived by using the weighted average shares outstanding during the period.
(2)The per share data for distributions was derived by using the actual shares outstanding at the date of the relevant transactions (refer to Note 9).
(3)Total return is calculated as the change in NAV per share during the period, plus distributions per share (assuming dividends and distributions are reinvested in accordance with the DRIP) divided by the beginning NAV per share. Total return does not include sales load.
(4)Total return based on market value is calculated as the change in market value per share during the respective periods, taking into account distributions, if any, reinvested in accordance with the DRIP.
(5)Amounts are annualized except for amounts relating to excise and other tax expense. For the three months ended March 31, 2026 and 2025, the ratio of total operating expenses to average net assets was 9.2% and 10.5%, respectively
Schedule of Senior Securities
The following is information about the Company’s senior securities as of the dates indicated in the table below:
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
Subscription Facility
March 31, 2026$— $— —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019119,752 2,151 —N/A
December 31, 2018— — —N/A
Jackson Hole Funding Facility
March 31, 2026105,374 1,755 —N/A
December 31, 202522,374 1,771 —N/A
December 31, 2024399,874 1,857 —N/A
December 31, 2023233,019 2,003 —N/A
December 31, 2022360,019 1,748 —N/A
December 31, 2021361,007 1,802 —N/A
December 31, 2020362,316 2,300 —N/A
December 31, 2019514,151 2,151 —N/A
December 31, 2018120,000 2,278 —N/A
Breckenridge Funding Facility
March 31, 2026771,850 1,755 —N/A
December 31, 2025652,550 1,771 —N/A
December 31, 2024649,350 1,857 —N/A
December 31, 2023741,700 2,003 —N/A
December 31, 2022825,000 1,748 —N/A
December 31, 2021568,680 1,802 —N/A
December 31, 2020569,000 2,300 —N/A
December 31, 2019820,311 2,151 —N/A
December 31, 201865,000 2,278 —N/A
Big Sky Funding Facility
March 31, 2026520,400 1,755 —N/A
December 31, 2025585,900 1,771 —N/A
December 31, 2024400,000 1,857 —N/A
December 31, 2023480,906 2,003 —N/A
December 31, 2022499,606 1,748 —N/A
December 31, 2021499,606 1,802 —N/A
December 31, 2020200,346 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
BXSL 2025-1 Facility
March 31, 2026$327,700 $1,755 —N/A
December 31, 202534,800 1,771 —N/A
December 31, 2024— 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Revolving Credit Facility
March 31, 20261,392,991 1,755 —N/A
December 31, 20251,447,497 1,771 —N/A
December 31, 20241,287,140 1,857 —N/A
December 31, 2023682,258 2,003 —N/A
December 31, 2022678,378 1,748 —N/A
December 31, 2021915,035 1,802 —N/A
December 31, 2020182,901 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2023 Notes
March 31, 2026— — —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022400,000 1,748 —N/A
December 31, 2021400,000 1,802 —N/A
December 31, 2020400,000 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2026 Notes
March 31, 2026— — —N/A
December 31, 2025800,000 1,771 —N/A
December 31, 2024800,000 1,857 —N/A
December 31, 2023800,000 2,003 —N/A
December 31, 2022800,000 1,748 —N/A
December 31, 2021800,000 1,802 —N/A
December 31, 2020800,000 2,300 —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
New 2026 Notes
March 31, 2026$700,000 $1,755 —N/A
December 31, 2025700,000 1,771 —N/A
December 31, 2024700,000 1,857 —N/A
December 31, 2023700,000 2,003 —N/A
December 31, 2022700,000 1,748 —N/A
December 31, 2021700,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2027 Notes
March 31, 2026650,000 1,755 —N/A
December 31, 2025650,000 1,771 —N/A
December 31, 2024650,000 1,857 —N/A
December 31, 2023650,000 2,003 —N/A
December 31, 2022650,000 1,748 —N/A
December 31, 2021650,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
2028 Notes
March 31, 2026650,000 1,755 —N/A
December 31, 2025650,000 1,771 —N/A
December 31, 2024650,000 1,857 —N/A
December 31, 2023650,000 2,003 —N/A
December 31, 2022650,000 1,748 —N/A
December 31, 2021650,000 1,802 —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
November 2027 Notes
March 31, 2026400,000 1,755 —N/A
December 31, 2025400,000 1,771 —N/A
December 31, 2024400,000 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
April 2028 Notes
March 31, 2026$700,000 $1,755 —N/A
December 31, 2025700,000 1,771 —N/A
December 31, 2024700,000 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
June 2030 Notes
March 31, 2026500,000 1,755 —N/A
December 31, 2025500,000 1,771 —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
January 2031 Notes
March 31, 2026500,000 1,755 —N/A
December 31, 2025500,000 1,771 —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
September 2029 Notes
March 31, 2026400,000 1,755 —N/A
December 31, 2025— — —N/A
December 31, 2024— — —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
2024-1 Notes
March 31, 2026$457,500 $1,755 —N/A
December 31, 2025457,500 1,771 —N/A
December 31, 2024457,500 1,857 —N/A
December 31, 2023— — —N/A
December 31, 2022— — —N/A
December 31, 2021— — —N/A
December 31, 2020— — —N/A
December 31, 2019— — —N/A
December 31, 2018— — —N/A
(1)Total amount of each class of senior securities outstanding at the end of the period presented.
(2)Asset coverage per unit is the ratio of the carrying value of the Company’s total assets, less all liabilities excluding indebtedness represented by senior securities in this table, to the aggregate amount of senior securities representing indebtedness. Asset coverage per unit is expressed in terms of dollar amounts per $1,000 of indebtedness and is calculated on a consolidated basis.
(3)The amount to which such class of senior security would be entitled upon the Company’s involuntary liquidation in preference to any security junior to it. The “-” in this column indicates information that the SEC expressly does not require to be disclosed for certain types of senior securities.
(4)Not applicable because the senior securities are not registered for public trading.
v3.26.1
Significant Accounting Policies (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accounting Policies [Abstract]    
Interest income $ 2,500 $ 12,900
Excise and other tax expense $ 4,090 $ 4,169
v3.26.1
Agreements and Related Party Transactions - Investment Advisory Agreement (Details) - Investment Advisory Agreement - component
 3 Months Ended
Oct. 28, 2021
Oct. 18, 2021
Mar. 31, 2026
Related Party Transaction [Line Items]      
Quarterly hurdle rate 1.50%    
Number of components     1
Affiliated Entity      
Related Party Transaction [Line Items]      
Quarterly hurdle rate   1.50%  
Notice period     60 days
Number of components     2
v3.26.1
Agreements and Related Party Transactions - Base Management Fee (Details) - USD ($)
$ in Thousands
 3 Months Ended 53 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Dec. 31, 2025
Related Party Transaction [Line Items]        
Management fees $ 36,366 $ 34,301    
Management fees payable $ 36,366   $ 36,366 $ 36,141
Investment Advisory Agreement        
Related Party Transaction [Line Items]        
Management fee rate     1.00%  
v3.26.1
Agreements and Related Party Transactions - Incentive Fees (Details)
 3 Months Ended 29 Months Ended
Oct. 28, 2021
Oct. 18, 2021
Mar. 31, 2026
USD ($)
component
Mar. 31, 2025
USD ($)
Mar. 31, 2024
Dec. 31, 2025
USD ($)
Related Party Transaction [Line Items]            
Income based incentive fees (Note 3)     $ 2,294,000 $ 34,301,000    
Income based incentive fees payable (Note 3)     2,294,000     $ 26,400,000
Capital gains based incentive fees (Note 3)     0 $ 0    
Capital gains based incentive fees payable (Note 3)     $ 0     $ 0
Investment Advisory Agreement            
Related Party Transaction [Line Items]            
Number of components | component     1      
Income based incentive rate 17.50%          
Quarterly hurdle rate 1.50%          
Incentive rate, catch up, percentage 100.00%          
Capital gains based incentive rate         17.50%  
Investment Advisory Agreement | Voluntary Waiver Not In Place            
Related Party Transaction [Line Items]            
Pre incentive fee cap percentage 17.50%          
Investment Advisory Agreement | Pre-Incentive Fee Net Investment Income For Trailing Twelve Quarters Less Than Or Equal To Catch-Up Amount            
Related Party Transaction [Line Items]            
Payment of pre incentive rate investment income, percentage 100.00%          
Investment Advisory Agreement | Pre-Incentive Fee Net Investment Income For Trailing Twelve Quarters Less Than Or Equal To Catch-Up Amount | Voluntary Waiver Not In Place            
Related Party Transaction [Line Items]            
Catch-up amount prior to the waiver period 1.82%          
Annual catch up amount prior to the waiver period 7.27%          
Investment Advisory Agreement | Pre-Incentive Fee Net Investment Income For Trailing Twelve Quarters Greater Than Catch-Up Amount | Voluntary Waiver Not In Place            
Related Party Transaction [Line Items]            
Payment of pre incentive rate investment income, percentage 17.50%          
Investment Advisory Agreement | Affiliated Entity            
Related Party Transaction [Line Items]            
Number of components | component     2      
Quarterly hurdle rate   1.50%        
Investment Management Agreement - Incentive Rate, Quarterly Hurdle Rate | Affiliated Entity            
Related Party Transaction [Line Items]            
Incentive fees rate     1.50%      
Investment Management Agreement - Incentive Rate, Annualized Hurdle Rate | Affiliated Entity            
Related Party Transaction [Line Items]            
Incentive fees rate     6.00%      
v3.26.1
Agreements and Related Party Transactions - Administration Agreement (Details) - USD ($)
$ in Thousands
 3 Months Ended
Oct. 01, 2018
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Related Party Transaction [Line Items]        
Administrative service expenses (Note 3)   $ 1,125 $ 966  
Affiliated Entity        
Related Party Transaction [Line Items]        
Due to affiliates   5,437   $ 4,817
Administration Agreement        
Related Party Transaction [Line Items]        
Related party transaction, initial term 2 years      
Administration Agreement | Affiliated Entity        
Related Party Transaction [Line Items]        
Due to affiliates   $ 1,000   $ 1,600
v3.26.1
Agreements and Related Party Transactions - Sub-Administration and Custody Agreement (Details) - Sub-Administration Agreement
Oct. 01, 2018
Related Party Transaction [Line Items]  
Related party transaction, initial term 2 years
Related party transaction, renewal term 1 year
Termination notice period 120 days
v3.26.1
Investments - Investment Portfolio at Cost and Fair Value (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2026
Jun. 30, 2025
Dec. 31, 2025
Schedule of Investments [Line Items]      
Cost $ 14,296,921   $ 14,387,967
Fair Value $ 13,942,140   $ 14,207,294
Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 100.00% 100.00% 100.00%
First lien debt      
Schedule of Investments [Line Items]      
Cost $ 13,973,977 [1],[2],[3]   $ 14,066,122 [4],[5],[6]
Fair Value $ 13,609,017 [1],[3]   13,866,434 [4],[6]
First lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 97.60% 97.60%  
Second lien debt      
Schedule of Investments [Line Items]      
Cost $ 233,536 [1],[2],[3]   232,448 [4],[5],[6]
Fair Value $ 228,827 [1],[3]   231,650 [4],[6]
Second lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.60% 1.60%  
Unsecured debt      
Schedule of Investments [Line Items]      
Cost $ 13,992 [1],[2],[3]   13,049
Fair Value $ 12,502 [1],[3]   12,278
Unsecured debt | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.10% 0.10%  
Equity      
Schedule of Investments [Line Items]      
Cost $ 75,416 [1],[2],[3]   76,348 [4],[5],[6]
Fair Value $ 91,794 [1],[3]   $ 96,932 [4],[6]
Equity | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.70% 0.70%  
[1] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of March 31, 2026, the aggregate fair value of these securities is $13,941.7 million or 228.56% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[2] The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method in accordance with accounting principles generally accepted in the United States of America (“GAAP”).
[3] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of March 31, 2026, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[4] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of December 31, 2025, the aggregate fair value of these securities is $14,206.9 million or 227.48% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[5] The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method in accordance with accounting principles generally accepted in the United States of America (“GAAP”).
[6] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of December 31, 2025, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
v3.26.1
Investments - Investments at Fair Value Percent (Details) - Investment Owned, At Fair Value - Investment Type Concentration Risk
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2026
Jun. 30, 2025
Dec. 31, 2025
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 100.00% 100.00% 100.00%
Aerospace & Defense      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 4.20%   4.10%
Air Freight & Logistics      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.20%   1.90%
Auto Components      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.00%   0.00%
Biotechnology      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.10%   1.10%
Building Products      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.40%   1.30%
Chemicals      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.30%   0.30%
Commercial Services & Supplies      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 8.20%   8.00%
Construction & Engineering      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.40%   1.20%
Consumer Staples Distribution And Retail      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.00%   0.00%
Containers & Packaging      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.20%   0.20%
Distributors      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.90%   2.10%
Diversified Consumer Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 4.20%   4.20%
Diversified Telecommunication Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.10%   0.10%
Electric Utilities      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.50%   1.40%
Electrical Equipment      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.40%   1.40%
Electronic Equipment, Instruments & Components      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 2.20%   2.10%
Energy Equipment & Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.20%   0.20%
Financial Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.50%   0.40%
Ground Transportation      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.10%   0.10%
Health Care Equipment & Supplies      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.40%   0.40%
Health Care Providers & Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 9.70%   9.50%
Health Care Technology      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 4.40%   5.60%
Insurance      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 9.30%   9.30%
Interactive Media & Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.70%   0.30%
IT Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 4.30%   4.30%
Life Sciences Tools & Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.90%   0.80%
Machinery      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.30%   0.30%
Marine Transportation      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.50%   0.40%
Media      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.50%   0.60%
Oil, Gas & Consumable Fuels      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.50%   0.50%
Paper & Forest Products      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.10%   0.10%
Pharmaceuticals      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.40%   0.40%
Professional Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 9.90%   9.70%
Real Estate Management & Development      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.50%   1.40%
Software      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 20.70%   20.50%
Specialty Retail      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.30%   1.30%
Technology Hardware, Storage & Peripherals      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.50%   0.60%
Trading Companies & Distributors      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.80%   0.90%
Transportation Infrastructure      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 3.00%   2.90%
Wireless Telecommunication Services      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.20%   0.10%
v3.26.1
Investments - Geographic Investment (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2026
Jun. 30, 2025
Dec. 31, 2025
Schedule of Investments [Line Items]      
Cost $ 14,296,921   $ 14,387,967
Fair Value $ 13,942,140   $ 14,207,294
Fair Value as % of Net Assets 228.60%   227.50%
Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 100.00% 100.00% 100.00%
United States      
Schedule of Investments [Line Items]      
Cost $ 12,300,117   $ 12,488,551
Fair Value $ 11,919,845   $ 12,259,789
Fair Value as % of Net Assets 195.40%   196.30%
United States | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 85.50%   86.30%
Europe      
Schedule of Investments [Line Items]      
Cost $ 1,687,271   $ 1,601,031
Fair Value $ 1,710,103   $ 1,645,999
Fair Value as % of Net Assets 28.10%   26.30%
Europe | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 12.20%   11.60%
Canada      
Schedule of Investments [Line Items]      
Cost $ 149,780   $ 138,265
Fair Value $ 151,492   $ 140,444
Fair Value as % of Net Assets 2.50%   2.30%
Canada | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.10%   1.00%
Bermuda/Cayman Islands      
Schedule of Investments [Line Items]      
Cost $ 147,876   $ 148,220
Fair Value $ 148,611   $ 148,966
Fair Value as % of Net Assets 2.40%   2.40%
Bermuda/Cayman Islands | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 1.10%   1.00%
Asia      
Schedule of Investments [Line Items]      
Cost $ 11,877   $ 11,900
Fair Value $ 12,089   $ 12,096
Fair Value as % of Net Assets 0.20%   0.20%
Asia | Investment Owned, At Fair Value | Investment Type Concentration Risk      
Schedule of Investments [Line Items]      
Concentration Risk, Percentage 0.10%   0.10%
v3.26.1
Investments - Additional Information (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
borrower
loan
Dec. 31, 2025
loan
borrower
Schedule of Investments [Line Items]    
Number of borrowers | borrower 8 5
Number of loans in non-accrual status | loan 13 8
Debt Securities, Variable Rate | Investments At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration percentage 99.50% 99.60%
Debt Securities, Fixed Rate | Investments At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration percentage 0.50% 0.40%
v3.26.1
Fair Value Measurements - Fair Value Hierarchy of Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total $ 13,942,140 $ 14,207,294
First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 13,609,017 13,866,434
Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 228,827 231,650
Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,502 12,278
Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 91,794 96,932
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 405 438
Level 1 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 1 | Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 1 | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 1 | Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 405 438
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 199,598 106,617
Level 2 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 199,598 106,617
Level 2 | Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 2 | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 2 | Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 13,742,137 14,100,239
Level 3 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 13,409,419 13,759,817
Level 3 | Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 228,827 231,650
Level 3 | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,502 12,278
Level 3 | Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total $ 91,389 $ 96,494
v3.26.1
Fair Value Measurements - Changes in Fair Value of Investments Measured Using Level 3 Inputs (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Total        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period $ 13,742,137 $ 12,602,272 $ 14,100,239 $ 12,976,765
Purchases of investments 347,325 717,597    
Proceeds from principal repayments and sales of investments (448,995) (997,993)    
Accretion of discount (amortization of premium) 11,041 16,085    
Transfers into level 3 0 225    
Transfers out of level 3 (96,383) (102,175)    
Fair value, end of period 13,742,137 12,602,272    
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments, included in net unrealized appreciation (depreciation) on the condensed consolidated statements of operations (170,867) (8,405)    
Investments, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) 1,054 8,525    
Investments, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) (172,144) (16,757)    
First lien debt        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 13,409,419 12,370,969 13,759,817 12,714,636
Purchases of investments 343,921 715,298    
Proceeds from principal repayments and sales of investments (445,638) (964,827)    
Accretion of discount (amortization of premium) 10,912 16,001    
Transfers into level 3 0 225    
Transfers out of level 3 (96,383) (102,175)    
Fair value, end of period 13,409,419 12,370,969    
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments, included in net unrealized appreciation (depreciation) on the condensed consolidated statements of operations (162,672) (5,329)    
Debt Securities, First Lien, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) 130 1,210    
Debt Securities, First Lien, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) (163,340) (9,399)    
Second lien debt        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 228,827 118,482 231,650 119,184
Purchases of investments 2,468 1,663    
Proceeds from principal repayments and sales of investments (1,500) (2,347)    
Accretion of discount (amortization of premium) 120 74    
Transfers into level 3 0 0    
Transfers out of level 3 0 0    
Fair value, end of period 228,827 118,482    
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments, included in net unrealized appreciation (depreciation) on the condensed consolidated statements of operations (3,911) (91)    
Debt Securities, Second Lien, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) 0 (1)    
Debt Securities, Second Lien, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) (3,911) (91)    
Unsecured debt        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 12,502 13,658 12,278 33,521
Purchases of investments 934 468    
Proceeds from principal repayments and sales of investments 0 (20,595)    
Accretion of discount (amortization of premium) 9 10    
Transfers into level 3 0 0    
Transfers out of level 3 0 0    
Fair value, end of period 12,502 13,658    
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments, included in net unrealized appreciation (depreciation) on the condensed consolidated statements of operations (719) (16)    
Unsecured Debt, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) 0 0    
Unsecured Debt, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) (719) 254    
Investments in equity        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 91,389 99,163 $ 96,494 $ 109,424
Purchases of investments 2 168    
Proceeds from principal repayments and sales of investments (1,857) (10,224)    
Accretion of discount (amortization of premium) 0 0    
Transfers into level 3 0 0    
Transfers out of level 3 0 0    
Fair value, end of period 91,389 99,163    
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments, included in net unrealized appreciation (depreciation) on the condensed consolidated statements of operations (3,565) (2,969)    
Equity Securities, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) 924 7,316    
Equity Securities, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net realized gain (loss) $ (4,174) $ (7,521)    
v3.26.1
Fair Value Measurements - Additional Information (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Fair Value Disclosures [Abstract]  
Contractual sale restrictions $ 5.8
Contractual sale restriction, remaining period 3 years 10 months 24 days
v3.26.1
Fair Value Measurements - Unobservable Inputs (Details)
$ in Thousands
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 13,942,140 $ 14,207,294
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 13,742,137 14,100,239
First lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 13,409,419 13,759,817
First lien debt | Yield Analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 13,129,390 13,198,498
First lien debt | Market Quotations | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 7,499 98,494
First lien debt | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 272,530 $ 462,825
First lien debt | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0714 0.0694
First lien debt | Low | Market Quotations | Level 3 | Broker quoted price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 92.89 97.25
First lien debt | Low | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 5 7.25
First lien debt | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2206 0.1936
First lien debt | High | Market Quotations | Level 3 | Broker quoted price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 100.25 100.00
First lien debt | High | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 12.5 12.47
First lien debt | Weighted Average | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0975 0.0944
First lien debt | Weighted Average | Market Quotations | Level 3 | Broker quoted price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 98.17 99.97
First lien debt | Weighted Average | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.8 11.23
Second lien debt | Yield Analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 228,827 $ 231,650
Second lien debt | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0864 0.0845
Second lien debt | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1584 0.1578
Second lien debt | Weighted Average | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1024 0.1011
Unsecured debt | Yield Analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 12,502 $ 12,278
Unsecured debt | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1610 0.1510
Unsecured debt | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1610 0.1510
Unsecured debt | Weighted Average | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1610 0.1510
Investments in equity | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 91,389 $ 96,494
Investments in equity | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 19,562 19,678
Investments in equity | Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 58,543 62,579
Investments in equity | Asset Recoverability | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 1,850 3,002
Investments in equity | Option Pricing Model | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 11,434 $ 11,235
Investments in equity | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1167 0.1250
Investments in equity | Low | Market Approach | Level 3 | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 6 6.4
Investments in equity | Low | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.5 8.5
Investments in equity | Low | Option Pricing Model | Level 3 | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3200 0.3200
Investments in equity | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2171 0.1950
Investments in equity | High | Market Approach | Level 3 | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 33.63 33.63
Investments in equity | High | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 16 16
Investments in equity | High | Option Pricing Model | Level 3 | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.7050 0.7050
Investments in equity | Weighted Average | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1669 0.1508
Investments in equity | Weighted Average | Market Approach | Level 3 | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.96 12.28
Investments in equity | Weighted Average | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.9 11.22
Investments in equity | Weighted Average | Option Pricing Model | Level 3 | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3351 0.3334
v3.26.1
Fair Value Measurements - Schedule of Fair Value Measurements of Unsecured Notes (Details) - Level 3 - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 4,836,028 $ 5,303,617
2026 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 0 799,357
New 2026 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 690,577 691,950
2027 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 631,721 632,710
2028 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 604,234 615,550
November 2027 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 401,157 408,680
April 2028 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 695,121 706,370
June 2030 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 484,410 497,550
January 2031 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 479,447 494,000
September 2029 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 391,905 0
2024-1 Notes | Term Loan    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 457,456 $ 457,450
v3.26.1
Derivatives - Aggregate Notional Amount and Fair Value Hierarchy of the Company (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Derivative Assets    
Derivative asset $ 31,268 $ 22,344
Notional 1,831,878 1,678,873
Derivative Liabilities    
Derivative liabilities (8,723) (2,711)
Notional 900,000 643,979
Cash collateral posted 1,821 11,286
Level 1    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities 0 0
Level 2    
Derivative Assets    
Derivative asset 31,268 22,344
Derivative Liabilities    
Derivative liabilities (8,723) (2,711)
Level 3    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities 0 0
Foreign currency forward contracts    
Derivative Assets    
Derivative asset 2,252 137
Notional 231,878 78,873
Derivative Liabilities    
Derivative liabilities 0 (822)
Notional 0 143,979
Foreign currency forward contracts | Level 1    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities 0 0
Foreign currency forward contracts | Level 2    
Derivative Assets    
Derivative asset 2,252 137
Derivative Liabilities    
Derivative liabilities 0 (822)
Foreign currency forward contracts | Level 3    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities 0 0
Interest Rate Swap    
Derivative Assets    
Derivative asset 29,016 22,207
Notional 1,600,000 1,600,000
Derivative Liabilities    
Derivative liabilities (8,723) (1,889)
Notional 900,000 500,000
Interest Rate Swap | Level 1    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities 0 0
Interest Rate Swap | Level 2    
Derivative Assets    
Derivative asset 29,016 22,207
Derivative Liabilities    
Derivative liabilities (8,723) (1,889)
Interest Rate Swap | Level 3    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities $ 0 $ 0
v3.26.1
Derivatives - Derivative Instrument Gain (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Net change in unrealized appreciation (depreciation) $ 2,943 $ (1,921)
Not Designated as Hedging Instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Net change in unrealized appreciation (depreciation) 2,943 (1,921)
Net realized gain (loss) 1,842 (2,055)
Not Designated as Hedging Instrument | Foreign currency forward contracts    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Net change in unrealized appreciation (depreciation) 2,943 (1,921)
Net realized gain (loss) $ 1,842 $ (2,055)
v3.26.1
Derivatives - Offsetting Derivative Instrument (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Derivative Asset    
Derivative Assets Subject to Master Netting Agreement $ 31,268 $ 22,344
Derivatives Available for Offset (8,723) (2,711)
Cash Collateral Offset 0 0
Net Amount Derivative Asset 22,545 19,633
Cash Collateral Received 0 0
Cash Collateral Received Not Offset 0 0
Derivative Liability    
Derivative Liabilities Subject to Master Netting Agreement (8,723) (2,711)
Derivatives Available for Offset 8,723 2,711
Cash Collateral Offset 0 0
Net Amount Derivative Liabilities 0 0
Cash Collateral Posted 1,821 11,286
Cash collateral pledged not offset 1,821 11,286
SMBC Capital Markets, Inc.    
Derivative Asset    
Derivative Assets Subject to Master Netting Agreement 11,205 8,251
Derivatives Available for Offset 0 0
Cash Collateral Offset 0 0
Net Amount Derivative Asset 11,205 8,251
Cash Collateral Received 0 0
Cash Collateral Received Not Offset 0 0
Derivative Liability    
Derivative Liabilities Subject to Master Netting Agreement 0 0
Derivatives Available for Offset 0 0
Cash Collateral Offset 0 0
Net Amount Derivative Liabilities 0 0
Cash Collateral Posted 1,821 1,805
Cash collateral pledged not offset 1,821 1,805
Wells Fargo Bank, N.A.    
Derivative Asset    
Derivative Assets Subject to Master Netting Agreement 20,063 14,093
Derivatives Available for Offset (8,723) (2,711)
Cash Collateral Offset 0 0
Net Amount Derivative Asset 11,340 11,382
Cash Collateral Received 0 0
Cash Collateral Received Not Offset 0 0
Derivative Liability    
Derivative Liabilities Subject to Master Netting Agreement (8,723) (2,711)
Derivatives Available for Offset 8,723 2,711
Cash Collateral Offset 0 0
Net Amount Derivative Liabilities 0 0
Cash Collateral Posted 0 9,481
Cash collateral pledged not offset $ 0 $ 9,481
v3.26.1
Derivatives - Interest Rate Swaps as the Hedging Instrument (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative [Line Items]    
Interest rate swaps $ (18,839) $ 15,409
Hedged items 19,498 (14,285)
Interest Rate Swap    
Derivative [Line Items]    
Interest rate swaps (18,839) 15,409
Hedged items $ 19,498 $ (14,285)
v3.26.1
Derivatives - Carrying Value of Unsecured Borrowings (Details) - Long-Term Debt - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Value $ 2,468,160 $ 2,091,290
Cumulative Hedging Adjustments $ (90) $ 19,408
v3.26.1
Borrowings - Jackson Hole Funding Facility (Details)
Dec. 19, 2024
Dec. 18, 2024
Mar. 31, 2026
USD ($)
Mar. 31, 2026
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Mar. 31, 2025
Debt Instrument [Line Items]              
Asset coverage ratio     175.50% 175.50% 177.10% 177.10% 184.20%
Jackson Hole Funding Facility, Foreign Currency Advances | Line of Credit | Revolving Credit Facility              
Debt Instrument [Line Items]              
Basis spread on variable rate   2.375%          
Jackson Hole Funding Facility, Dollar Advances | Line of Credit | Revolving Credit Facility              
Debt Instrument [Line Items]              
Basis spread on variable rate   2.525%          
Jackson Hole Funding Facility | Line of Credit | Revolving Credit Facility              
Debt Instrument [Line Items]              
Basis spread on variable rate 1.95%            
Minimum utilization percentage 75.00%            
Unused capacity, commitment fee percentage 0.48%            
Line of credit facility, maximum borrowing capacity     $ 500,000,000.0 € 0 $ 500,000,000 € 0  
Accordion feature     $ 900,000,000.0        
Jackson Hole Funding Facility | Line of Credit | Revolving Credit Facility | Scenario 1              
Debt Instrument [Line Items]              
Unused capacity, commitment fee percentage 1.50% 1.775%          
v3.26.1
Borrowings - Breckenridge Funding Facility (Details) - Revolving Credit Facility - Breckenridge Funding Facility - Line of Credit
Dec. 18, 2024
Dec. 17, 2024
Debt Instrument [Line Items]    
Basis spread on variable rate 1.90%  
Scenario 1    
Debt Instrument [Line Items]    
Unused capacity, commitment fee percentage 0.70%  
Scenario 2    
Debt Instrument [Line Items]    
Unused capacity, commitment fee percentage 0.35%  
High | Scenario 1    
Debt Instrument [Line Items]    
Unused capacity percentage 50.00%  
High | Scenario 2    
Debt Instrument [Line Items]    
Unused capacity percentage 50.00%  
Low | Scenario 2    
Debt Instrument [Line Items]    
Unused capacity percentage 25.00%  
Scenario 1    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.40% 1.70%
Scenario 2    
Debt Instrument [Line Items]    
Basis spread on variable rate   2.05%
Scenario 3    
Debt Instrument [Line Items]    
Basis spread on variable rate   2.30%
v3.26.1
Borrowings - Big Sky Funding Facility (Details) - Revolving Credit Facility - Big Sky Funding Facility - Line of Credit - USD ($)
$ in Thousands
Nov. 20, 2024
Sep. 25, 2024
Mar. 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]        
Basis spread on variable rate 1.85% 1.80%    
Interest rate floor percentage   1.80%    
Minimum utilization percentage   80.00%    
Line of credit facility, maximum borrowing capacity     $ 650,000 $ 650,000
Accordion feature     $ 800,000  
Low        
Debt Instrument [Line Items]        
Basis spread on variable rate   1.50%    
High        
Debt Instrument [Line Items]        
Basis spread on variable rate   1.95%    
Scenario 1        
Debt Instrument [Line Items]        
Unused capacity, commitment fee percentage   1.60%    
Scenario 2        
Debt Instrument [Line Items]        
Unused capacity, commitment fee percentage   0.45%    
v3.26.1
Borrowings - BXSL 2025-1 Facility (Details) - BXSL 2025-1 Facility - Line of Credit - Revolving Credit Facility
Dec. 27, 2024
Debt Instrument [Line Items]  
Basis spread on variable rate 1.65%
Scenario 1  
Debt Instrument [Line Items]  
Basis spread on variable rate 2.15%
v3.26.1
Borrowings - Revolving Credit Facility (Details) - Line of Credit
€ in Millions, £ in Millions, $ in Millions, $ in Millions
Aug. 06, 2024
Mar. 31, 2026
USD ($)
Mar. 31, 2026
EUR (€)
Mar. 31, 2026
CAD ($)
Mar. 31, 2026
GBP (£)
Mar. 31, 2026
AUD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
CAD ($)
Dec. 31, 2025
GBP (£)
Dec. 31, 2025
AUD ($)
Aug. 04, 2025
USD ($)
Jun. 09, 2023
Term Loan | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Line of credit facility, maximum borrowing capacity   $ 433,500,000                      
Letter of Credit | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Line of credit facility, maximum borrowing capacity                       $ 175,000,000.0  
Letter of Credit | CitiBank, Revolving Credit Facility, Revolving Commitments 2026                          
Debt Instrument [Line Items]                          
Line of credit facility, maximum borrowing capacity                       200,000,000.0  
Letter of Credit | CitiBank, Revolving Credit Facility, Revolving Commitments 2027                          
Debt Instrument [Line Items]                          
Line of credit facility, maximum borrowing capacity                       $ 200,000,000.0  
Unused capacity, commitment fee percentage 0.375%                        
Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Asset coverage ratio                         1.50
Revolving Credit Facility | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Line of credit facility, maximum borrowing capacity   2,525,000,000 € 469.5 $ 38.4 £ 293.5 $ 1.0 $ 2,425,000,000 € 417.2 $ 30.7 £ 293.5 $ 1.0    
Unused capacity, commitment fee percentage 0.325%                        
Revolving Credit Facility | Scenario 1 | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.525%                        
Combined revolving debt amount multiplier 2.0                        
Revolving Credit Facility | Scenario 1 | CitiBank, Revolving Credit Facility, Revolving Commitments                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.75%                        
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Scenario 2 | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.65%                        
Revolving Credit Facility | Scenario 2 | Revolving Credit Facility | High                          
Debt Instrument [Line Items]                          
Combined revolving debt amount multiplier 2.0                        
Revolving Credit Facility | Scenario 2 | Revolving Credit Facility | Low                          
Debt Instrument [Line Items]                          
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Scenario 2 | CitiBank, Revolving Credit Facility, Revolving Commitments                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.875%                        
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Scenario 3 | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.775%                        
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Scenario 3 | CitiBank, Revolving Credit Facility, Revolving Commitments                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 1.75%                        
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Scenario 4 | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 1.525%                        
Combined revolving debt amount multiplier 2.0                        
Revolving Credit Facility | Scenario 4 | CitiBank, Revolving Credit Facility, Revolving Commitments                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 1.875%                        
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Scenario 5 | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 1.65%                        
Revolving Credit Facility | Scenario 5 | Revolving Credit Facility | High                          
Debt Instrument [Line Items]                          
Combined revolving debt amount multiplier 2.0                        
Revolving Credit Facility | Scenario 5 | Revolving Credit Facility | Low                          
Debt Instrument [Line Items]                          
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Scenario 6 | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 1.775%                        
Combined revolving debt amount multiplier 1.6                        
Revolving Credit Facility | Base Rate | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.50%                        
Revolving Credit Facility | Base Rate | CitiBank, Revolving Credit Facility, Revolving Commitments                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.50%                        
Revolving Credit Facility | SOFR | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 1.00%                        
Revolving Credit Facility | SOFR | CitiBank, Revolving Credit Facility, Revolving Commitments                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 1.00%                        
Revolving Commitments | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Line of credit facility, maximum borrowing capacity   $ 2,100,000,000                      
v3.26.1
Borrowings - Unsecured Debt (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 03, 2026
Dec. 31, 2025
Oct. 14, 2025
Mar. 04, 2025
Dec. 16, 2024
Oct. 15, 2024
May 20, 2024
Sep. 30, 2021
Jul. 23, 2021
Apr. 27, 2021
Mar. 16, 2021
Dec. 01, 2020
Oct. 23, 2020
Debt Instrument [Line Items]                            
Aggregate principal amount $ 10,207,500,000   $ 10,507,500,000                      
Unsecured debt                            
Debt Instrument [Line Items]                            
Redemption percentage 100.00%                          
Unsecured debt | 3.625% Notes Due 2026                            
Debt Instrument [Line Items]                            
Aggregate principal amount     800,000,000                   $ 300,000,000.0 $ 500,000,000.0
Interest rate                         3.625% 3.625%
Unsecured debt | 2.750% Notes Due 2026                            
Debt Instrument [Line Items]                            
Aggregate principal amount $ 700,000,000   700,000,000               $ 300,000,000.0 $ 400,000,000.0    
Interest rate                     2.75% 2.75%    
Unsecured debt | 2.125% Senior Notes Due 2027                            
Debt Instrument [Line Items]                            
Aggregate principal amount 650,000,000   650,000,000             $ 650,000,000.0        
Interest rate                   2.125%        
Unsecured debt | 2.850% Notes Due 2028                            
Debt Instrument [Line Items]                            
Aggregate principal amount 650,000,000   650,000,000           $ 650,000,000.0          
Interest rate                 2.85%          
Unsecured debt | 5.875% Notes Due 2027                            
Debt Instrument [Line Items]                            
Aggregate principal amount 400,000,000   400,000,000         $ 400,000,000.0            
Interest rate               5.875%            
Unsecured debt | 5.350% Notes Due 2028                            
Debt Instrument [Line Items]                            
Aggregate principal amount 700,000,000   700,000,000     $ 300,000,000.0 $ 400,000,000.0              
Interest rate             5.35%              
Unsecured debt | 5.300% Notes Due 2030                            
Debt Instrument [Line Items]                            
Aggregate principal amount 500,000,000   500,000,000   $ 500,000,000.0                  
Interest rate         5.30%                  
Unsecured debt | 5.125% Notes Due 2031                            
Debt Instrument [Line Items]                            
Aggregate principal amount 500,000,000   $ 500,000,000 $ 500,000,000.0                    
Interest rate       5.125%                    
Unsecured debt | 5.250% Notes Due 2029                            
Debt Instrument [Line Items]                            
Aggregate principal amount $ 400,000,000 $ 400,000,000.0                        
Interest rate   5.25%                        
v3.26.1
Borrowings - 2024-1 CLO Debt (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Nov. 21, 2024
Debt Instrument [Line Items]      
Aggregate Principal Committed $ 10,207,500,000 $ 10,507,500,000  
Principal outstanding 8,075,815,000 8,100,621,000  
Investments at fair value 13,942,140,000 14,207,294,000  
Restricted cash 75,966,000 89,406,000  
Cash and cash equivalents 351,276,000 289,605,000  
Total assets 14,436,610,000 14,656,463,000  
Debt 8,033,886,000 8,080,129,000  
Unamortized Debt Issuance Costs (including premiums and discounts) 41,840,000 39,900,000  
Interest payable 60,581,000 61,952,000  
Total liabilities 8,336,930,000 8,411,288,000  
2024-1 Issuer      
Debt Instrument [Line Items]      
Investments at fair value 717,480,000 727,232,000  
Restricted cash 75,966,000 89,406,000  
Cash and cash equivalents 75,966,000 89,406,000  
Total assets 798,688,000 825,929,000  
Debt 455,338,000 455,288,000  
Unamortized Debt Issuance Costs (including premiums and discounts) 2,162,000 2,212,000  
Interest payable 4,696,000 5,029,000  
Total liabilities 460,034,000 460,317,000  
Non-controlled/non-affiliated investments      
Debt Instrument [Line Items]      
Investments at fair value 13,903,727,000 [1],[2] 14,167,499,000 [3],[4]  
Interest receivable from non-controlled/non-affiliated investments 97,807,000 105,695,000  
Non-controlled/non-affiliated investments | 2024-1 Issuer      
Debt Instrument [Line Items]      
Investments at fair value 717,480,000 727,232,000  
Interest receivable from non-controlled/non-affiliated investments 5,242,000 9,291,000  
2024-1 CLO Debt      
Debt Instrument [Line Items]      
Aggregate Principal Committed 457,500,000 457,500,000  
Principal outstanding 746,770,000    
Debt 455,338,000 455,288,000  
Unamortized Debt Issuance Costs (including premiums and discounts) 2,162,000 $ 2,212,000  
Secured debt | 2024-1 CLO Debt      
Debt Instrument [Line Items]      
Aggregate Principal Committed     $ 746,800,000
Principal outstanding 510,000,000    
Secured debt | 2024-1 CLO, Class A Notes, Senior Secured Floating Rate      
Debt Instrument [Line Items]      
Principal outstanding $ 0    
Basis spread on variable rate 151.00%    
Secured debt | 2024-1 CLO, Class A-L Loans, Senior Secured Floating Rate      
Debt Instrument [Line Items]      
Principal outstanding $ 412,500,000    
Basis spread on variable rate 151.00%    
Secured debt | 2024-1 CLO, Class B Notes, Senior Secured Floating Rate      
Debt Instrument [Line Items]      
Principal outstanding $ 45,000,000    
Basis spread on variable rate 178.00%    
Secured debt | 2024-1 CLO, Class C Notes, Mezzanine Secured Deferrable Floating Rate      
Debt Instrument [Line Items]      
Principal outstanding $ 52,500,000    
Basis spread on variable rate 200.00%    
Subordinated Debt | 2024-1 CLO Debt      
Debt Instrument [Line Items]      
Principal outstanding $ 236,770,000    
[1] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of March 31, 2026, the aggregate fair value of these securities is $13,941.7 million or 228.56% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[2] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of March 31, 2026, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[3] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), excluding Axsome Therapeutics, Inc. - Common Stock, and may be deemed to be “restricted securities.” As of December 31, 2025, the aggregate fair value of these securities is $14,206.9 million or 227.48% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[4] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of December 31, 2025, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
v3.26.1
Borrowings - Outstanding Debt Obligations (Details)
£ in Millions, $ in Millions, $ in Millions
Mar. 31, 2026
USD ($)
Mar. 31, 2026
EUR (€)
Mar. 31, 2026
CAD ($)
Mar. 31, 2026
GBP (£)
Mar. 31, 2026
AUD ($)
Mar. 03, 2026
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
CAD ($)
Dec. 31, 2025
GBP (£)
Dec. 31, 2025
AUD ($)
Oct. 14, 2025
USD ($)
Mar. 04, 2025
USD ($)
Dec. 16, 2024
USD ($)
Oct. 15, 2024
USD ($)
May 20, 2024
USD ($)
Sep. 30, 2021
USD ($)
Jul. 23, 2021
USD ($)
Apr. 27, 2021
USD ($)
Mar. 16, 2021
USD ($)
Dec. 01, 2020
USD ($)
Oct. 23, 2020
USD ($)
Debt Instrument [Line Items]                                            
Aggregate Principal Committed $ 10,207,500,000           $ 10,507,500,000                              
Outstanding Principal 8,075,815,000           8,100,621,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 8,033,886,000           8,080,129,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 41,840,000           39,900,000                              
Unused portion 2,131,685,000           2,406,879,000                              
Amount available 1,991,622,000           2,288,977,000                              
Jackson Hole Funding Facility | Line of Credit | Revolving Credit Facility                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 500,000,000.0 € 0         500,000,000 € 0                            
Outstanding Principal 105,374,000           22,374,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 105,374,000           22,374,000                              
Unused portion 394,626,000           477,626,000                              
Amount available 254,563,000           477,626,000                              
Breckenridge Funding Facility | Line of Credit | Revolving Credit Facility                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 1,175,000,000           1,175,000,000                              
Outstanding Principal 771,850,000           652,550,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 771,850,000           652,550,000                              
Unused portion 403,150,000           522,450,000                              
Amount available 403,150,000           418,348,000                              
Big Sky Funding Facility | Line of Credit | Revolving Credit Facility                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 650,000,000           650,000,000                              
Outstanding Principal 520,400,000           585,900,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 520,400,000           585,900,000                              
Unused portion 129,600,000           64,100,000                              
Amount available 129,600,000           64,100,000                              
BXSL 2025-1 Facility | Line of Credit | Revolving Credit Facility                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 400,000,000           400,000,000                              
Outstanding Principal 327,700,000           34,800,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 327,700,000           34,800,000                              
Unused portion 72,300,000           365,200,000                              
Amount available 72,300,000           351,400,000                              
Revolving Credit Facility | Line of Credit | Revolving Credit Facility                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 2,525,000,000 € 469,500,000 $ 38.4 £ 293.5 $ 1.0   2,425,000,000 € 417,200,000 $ 30.7 £ 293.5 $ 1.0                      
Outstanding Principal 1,392,991,000           1,447,497,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 1,392,991,000           1,447,497,000                              
Unused portion 1,132,009,000           977,503,000                              
Amount available 1,132,009,000           977,503,000                              
3.625% Notes Due 2026 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed             800,000,000                           $ 300,000,000.0 $ 500,000,000.0
Outstanding Principal             800,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts)             799,936,000                              
Unamortized Debt Issuance Costs (including premiums and discounts)             64,000                              
2.750% Notes Due 2026 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 700,000,000           700,000,000                       $ 300,000,000.0 $ 400,000,000.0    
Outstanding Principal 700,000,000           700,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 699,184,000           698,746,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 816,000           1,254,000                              
2.125% Senior Notes Due 2027 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 650,000,000           650,000,000                     $ 650,000,000.0        
Outstanding Principal 650,000,000           650,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 647,589,000           646,911,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 2,411,000           3,089,000                              
2.850% Notes Due 2028 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 650,000,000           650,000,000                   $ 650,000,000.0          
Outstanding Principal 650,000,000           650,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 645,300,000           644,837,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 4,700,000           5,163,000                              
5.875% Notes Due 2027 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 400,000,000           400,000,000                 $ 400,000,000.0            
Outstanding Principal 400,000,000           400,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 401,101,000           403,760,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 3,292,000           3,803,000                              
5.350% Notes Due 2028 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 700,000,000           700,000,000             $ 300,000,000.0 $ 400,000,000.0              
Outstanding Principal 700,000,000           700,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 695,894,000           700,057,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 5,447,000           6,107,000                              
5.300% Notes Due 2030 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 500,000,000           500,000,000           $ 500,000,000.0                  
Outstanding Principal 500,000,000           500,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 494,472,000           497,626,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 8,998,000           9,520,000                              
5.125% Notes Due 2031 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 500,000,000           500,000,000         $ 500,000,000.0                    
Outstanding Principal 500,000,000           500,000,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 487,076,000           489,847,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) 8,200,000           8,688,000                              
5.250% Notes Due 2029 | Unsecured debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 400,000,000         $ 400,000,000.0                                
Outstanding Principal 400,000,000                                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 389,617,000                                          
Unamortized Debt Issuance Costs (including premiums and discounts) 5,814,000                                          
2024-1 CLO Debt                                            
Debt Instrument [Line Items]                                            
Aggregate Principal Committed 457,500,000           457,500,000                              
Outstanding Principal 746,770,000                                          
Outstanding Principal 457,500,000           457,500,000                              
Carrying Value (net of unamortized issuance costs, premiums and discounts) 455,338,000           455,288,000                              
Unamortized Debt Issuance Costs (including premiums and discounts) $ 2,162,000           $ 2,212,000                              
v3.26.1
Borrowings - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Debt Disclosure [Abstract]      
Interest expense $ 60.0   $ 60.8
Unused commitment fees $ 0.6   $ 1.2
Weighted average interest rate 4.83% 5.01%  
Weighted average interest rate all-in 4.90% 5.09%  
Average principal debt outstanding $ 8,172.9 $ 7,313.5  
v3.26.1
Borrowings - Interest Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Debt Disclosure [Abstract]    
Borrowing interest expense $ 93,283 $ 87,640
Facility unused fees 2,160 1,701
Amortization of deferred financing costs 1,450 1,409
Amortization of original issue discount and debt issuance costs (including premiums and discounts) 3,935 3,350
Gain (loss) from interest rate swaps accounted for as hedges and the related hedged items:    
Interest rate swaps 18,839 (15,409)
Hedged items (19,498) 14,285
Interest expense 100,169 92,976
Cash paid for interest expense $ 115,628 $ 96,301
v3.26.1
Borrowings - Contractual Maturities Of Outstanding Principal (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Less than 1 Year $ 1,350,000 $ 1,500,000
1 - 3 Years 2,703,474 3,043,074
3 - 5 Years 3,564,841 2,600,047
Greater than 5 Years 457,500 957,500
Total 8,075,815 8,100,621
SPV Financing Facilities | Line of Credit    
Debt Instrument [Line Items]    
Less than 1 Year 0 0
1 - 3 Years 953,474 643,074
3 - 5 Years 771,850 652,550
Greater than 5 Years 0 0
Total 1,725,324 1,295,624
Revolving Credit Facility | Line of Credit    
Debt Instrument [Line Items]    
Less than 1 Year 0 0
1 - 3 Years 0 0
3 - 5 Years 1,392,991 1,447,497
Greater than 5 Years 0 0
Total 1,392,991 1,447,497
Unsecured Notes | Unsecured debt    
Debt Instrument [Line Items]    
Less than 1 Year 1,350,000 1,500,000
1 - 3 Years 1,750,000 2,400,000
3 - 5 Years 1,400,000 500,000
Greater than 5 Years 0 500,000
Total 4,500,000 4,900,000
Debt Securitizations | Term Loan    
Debt Instrument [Line Items]    
Less than 1 Year 0 0
1 - 3 Years 0 0
3 - 5 Years 0 0
Greater than 5 Years 457,500 457,500
Total $ 457,500 $ 457,500
v3.26.1
Commitment and Contingencies (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Other Commitments [Line Items]    
Estimated future amount $ 139.7 $ 151.8
Delayed Draw Term Loans And Revolvers    
Other Commitments [Line Items]    
Unfunded commitments $ 1,600.0 $ 1,800.0
v3.26.1
Net Assets - Subscriptions and Drawdowns (Details)
Mar. 31, 2026
USD ($)
equity_distribution_agreement
$ / shares
Dec. 31, 2025
$ / shares
Equity [Abstract]    
Common stock, par value (in usd per share) | $ / shares $ 0.001 $ 0.001
Number of agreements | equity_distribution_agreement 8  
Aggregate sales price $ 600,000,000.0  
Remaining available for issuance $ 557,400,000  
v3.26.1
Net Assets - Shares Issued and Proceeds Received (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Subsidiary, Sale of Stock [Line Items]    
Net proceeds $ 0 $ 189,235
At-the-Market Offering, Offering    
Subsidiary, Sale of Stock [Line Items]    
Number of common shares issued (in shares)   5,761,648
Gross proceeds   $ 186,697
Placement Fees/Offering Expenses   1,867
Net proceeds   $ 184,830
Offering price per share (in usd per share)   $ 32.08
v3.26.1
Net Assets - Distributions Declared (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Equity [Abstract]    
Per share amount (in usd per share) $ 0.7700 $ 0.7700
Total Amount $ 178,855 $ 175,421
v3.26.1
Net Assets - Dividend Reinvestment (Details)
 3 Months Ended
Mar. 31, 2026
Equity [Abstract]  
Purchase price of common stock, percent of market price 95.00%
v3.26.1
Net Assets - Amounts Received and Shares Issued (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jan. 23, 2026
Jan. 24, 2025
Mar. 31, 2026
Mar. 31, 2025
Equity [Abstract]        
DRIP Shares Value $ 8,114 $ 5,130 $ 8,114 [1] $ 5,130 [1]
DRIP shares issued (in shares) 310,753 165,096 310,753 165,096
[1] The par amount of the shares is less than 1,000 and rounds to zero.
v3.26.1
Net Assets - Share Repurchase Plan (Details) - USD ($)
 1 Months Ended 3 Months Ended
Feb. 28, 2026
Mar. 31, 2026
Equity, Class of Treasury Stock [Line Items]    
Shares repurchased (in shares)   0
Company 10b-18 Plan    
Equity, Class of Treasury Stock [Line Items]    
Stock repurchase program authorized amount $ 250,000,000.0  
Period in force 1 year  
v3.26.1
Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Earnings Per Share [Abstract]    
Net increase (decrease) in net assets resulting from operations $ 25,246 $ 149,809
Weighted average shares outstanding basic (in shares) 232,203,849 226,577,167
Weighted average shares outstanding diluted (in shares) 232,203,849 226,577,167
Earnings (loss) per common share basic (in usd per share) $ 0.11 $ 0.66
Earnings (loss) per common share diluted (in usd per share) $ 0.11 $ 0.66
v3.26.1
Financial Highlights and Senior Securities (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Investment Company, Financial Highlights [Roll Forward]        
Net asset value, beginning of period (in usd per share) $ 26.92 $ 27.39    
Net investment income, basic (in usd per share) 0.77 0.83    
Net change in unrealized and realized gain (loss) (in usd per share) (0.66) (0.17)    
Net increase (decrease) in net assets resulting from operations (in usd per share) 0.11 0.66    
Distributions from net investment income (in usd per share) (0.77) (0.77)    
Net increase (decrease) in net assets from capital share transactions (in usd per share) 0 0.11    
Total increase (decrease) in net assets (in usd per share) (0.66) 0.00    
Net asset value, ending of period (in usd per share) 26.26 27.39    
Market value, end of period (in usd per share) $ 23.69 $ 32.36    
Shares outstanding, end of period 232,279,811 227,818,928 231,969,058  
Total return based on NAV 0.70% 2.80%    
Total return based on market value (7.40%) 2.60%    
Ratios:        
Ratio of net expenses to average net assets 9.20% 10.50%    
Ratio of net investment income to average net assets 11.60% 12.20%    
Portfolio turnover rate 2.30% 5.30%    
Supplemental Data:        
Net assets, end of period $ 6,099,680 $ 6,240,869 $ 6,245,175 $ 6,076,521
Asset coverage ratio 175.50% 184.20% 177.10%  
Ratio of expenses to average net assets, before waivers 9.20% 10.50%    
v3.26.1
Financial Highlights and Senior Securities - Narrative (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Investment Company [Abstract]    
Outstanding Principal $ 8,075,815 $ 8,100,621
v3.26.1
Subsequent Events (Details) - $ / shares
 3 Months Ended
May 07, 2026
Mar. 31, 2026
Mar. 31, 2025
Subsequent Event [Line Items]      
Distributions declared and payable per share (in usd per share)   $ 0.7700 $ 0.7700
Subsequent Event      
Subsequent Event [Line Items]      
Distributions declared and payable per share (in usd per share) $ 0.77