BLACKSTONE SECURED LENDING FUND, 10-Q filed on 8/6/2025
Quarterly Report
v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Aug. 04, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
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, Address Line Two 31st Floor  
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, $0.001 par value per share  
Trading Symbol BXSL  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   230,232,988
Entity Central Index Key 0001736035  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
v3.25.2
Condensed Consolidated Statements of Assets and Liabilities - USD ($)
Jun. 30, 2025
Dec. 31, 2024
ASSETS    
Investments at fair value $ 13,252,800,000 $ 13,092,518,000
Cash and Cash Equivalent 273,678,000 229,606,000
Receivable from broker 11,070,000 4,807,000
Deferred financing costs 19,547,000 21,865,000
Receivable for investments 23,414,000 2,976,000
Receivable for shares sold 5,393,000 4,405,000
Derivative assets at fair value (Note 6) 20,345,000 3,995,000
Total assets 13,710,955,000 13,472,224,000
LIABILITIES    
Debt (net of unamortized debt issuance costs of $38,859 and $34,877, respectively) 7,090,550,000 7,056,091,000
Payable for investments 2,340,000 19,277,000
Management fees payable (Note 3) 34,600,000 32,305,000
Income based incentive fees payable (Note 3) 34,718,000 38,708,000
Capital gains based incentive fees payable (Note 3) 0 0
Interest payable 65,174,000 53,958,000
Distribution payable 177,007,000 170,751,000
Board of Trustees’ fees payable 296,000 289,000
Accrued expenses and other liabilities 12,328,000 17,212,000
Total liabilities 7,422,659,000 7,395,703,000
Commitments and contingencies (Note 8)
NET ASSETS    
Common Shares, $0.001 par value (unlimited shares authorized; 230,055,444 and 221,892,184 shares issued and outstanding, respectively) 230,000 222,000
Additional paid in capital 6,009,106,000 5,749,762,000
Distributable earnings (loss) 278,960,000 326,537,000
Total net assets 6,288,296,000 6,076,521,000
Total liabilities and net assets $ 13,710,955,000 $ 13,472,224,000
Net asset value per share (in usd per share) $ 27.33 $ 27.39
Affiliated Entity    
LIABILITIES    
Due to affiliates $ 5,646,000 $ 7,112,000
Non-controlled/non-affiliated investments    
ASSETS    
Investments at fair value 13,223,290,000 [1],[2] 13,063,171,000 [3],[4]
Interest receivable from non-controlled/non-affiliated investments 104,702,000 112,046,000
Non-controlled/affiliated investments    
ASSETS    
Investments at fair value 29,510,000 [1],[2] 29,347,000 [3],[4]
Interest receivable from non-controlled/non-affiliated investments $ 6,000 $ 6,000
[1]
(1)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 June 30, 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.
[2] 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 June 30, 2025, the aggregate fair value of these securities is $13,251.4 million or 210.76% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[3] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities.” As of December 31, 2024, the aggregate fair value of these securities is $13,092.5 million or 215.43% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[4] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in dollars. As of December 31, 2024, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
v3.25.2
Condensed Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Cost $ 13,327,359 $ 13,193,219
Restricted cash 87,065 2,499
Net of unamortized debt issuance costs $ 38,859 $ 34,877
Common stock, par value (in usd per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares)
Common stock, shares issued (in shares) 230,055,444 221,892,184
Common stock, shares outstanding (in shares) 230,055,444 221,892,184
Non-controlled/non-affiliated investments    
Cost $ 13,299,807 [1],[2],[3] $ 13,166,677 [4],[5],[6]
Non-controlled/affiliated investments    
Cost $ 27,552 [1],[2],[3] $ 26,542 [4],[5],[6]
[1]
(1)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 June 30, 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.
[2] 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 June 30, 2025, the aggregate fair value of these securities is $13,251.4 million or 210.76% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[3] 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”).
[4] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities.” As of December 31, 2024, the aggregate fair value of these securities is $13,092.5 million or 215.43% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[5] The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method in accordance with accounting principles generally accepted in the United States of America (“GAAP”).
[6] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in dollars. As of December 31, 2024, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
v3.25.2
Condensed Consolidated Statements of Operations - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Investment income:        
Total investment income $ 344,803,000 $ 327,064,000 $ 702,567,000 $ 631,024,000
Expenses:        
Interest expense 92,285,000 78,841,000 185,263,000 145,560,000
Management fees (Note 3) 34,600,000 28,094,000 68,901,000 54,134,000
Income based incentive fees (Note 3) 34,718,000 37,380,000 69,019,000 73,225,000
Capital gains based incentive fees (Note 3) 0 3,122,000 0 6,256,000
Professional fees 1,243,000 1,069,000 2,129,000 2,020,000
Board of Trustees’ fees 293,000 289,000 599,000 511,000
Administrative service expenses (Note 3) 744,000 765,000 1,710,000 1,442,000
Other general and administrative 1,220,000 985,000 2,283,000 2,159,000
Total expenses before tax expense 165,103,000 150,545,000 329,904,000 285,307,000
Net investment income before tax expense 179,700,000 176,519,000 372,663,000 345,717,000
Excise and other tax expense 3,798,000 3,421,000 7,966,000 6,771,000
Net investment income after tax expense 175,902,000 173,098,000 364,697,000 338,946,000
Net change in unrealized appreciation (depreciation):        
Net change in unrealized (appreciation) depreciation on investments     (49,073,000) 32,747,000
Derivative instruments (Note 6) (3,126,000) 0 (5,047,000) 0
Translation of assets and liabilities in foreign currencies 438,000 124,000 720,000 103,000
Income tax (provision) benefit (294,000) 0 (1,774,000) 0
Net change in unrealized appreciation (depreciation) (11,300,000) 21,085,000 (55,174,000) 32,850,000
Net realized gain (loss):        
Non-controlled/non-affiliated investments     7,295,000 623,000
Derivative instruments (Note 6) (7,673,000) 0 (9,727,000) 0
Foreign currency transactions (541,000) 1,808,000 (1,528,000) 7,522,000
Current tax expense on realized gains (116,000) 0 (712,000) 0
Net realized gain (loss) (9,560,000) 2,003,000 (4,672,000) 8,145,000
Net realized and change in unrealized gain (loss) (20,860,000) 23,088,000 (59,846,000) 40,995,000
Net increase (decrease) in net assets resulting from operations $ 155,042,000 $ 196,186,000 $ 304,851,000 $ 379,941,000
Net investment income, basic (in usd per share) $ 0.77 $ 0.89 $ 1.60 $ 1.76
Net investment income, diluted (in usd per share) 0.77 0.89 1.60 1.76
Earnings (loss) per share basic (in usd per share) 0.68 1.01 1.34 1.98
Earnings (loss) per share diluted (in usd per share) $ 0.68 $ 1.01 $ 1.34 $ 1.98
Weighted average shares outstanding basic (in shares) 228,192,335 193,908,352 227,389,213 192,254,100
Weighted average shares outstanding diluted (in shares) 228,192,335 193,908,352 227,389,213 192,254,100
Non-controlled/non-affiliated investments        
Investment income:        
Interest income $ 320,800,000 $ 302,691,000 $ 656,448,000 $ 585,955,000
Payment-in-kind interest income 21,878,000 22,876,000 42,696,000 43,338,000
Dividend income 49,000 189,000 49,000 189,000
Fee income 1,498,000 1,171,000 2,223,000 1,405,000
Net change in unrealized appreciation (depreciation):        
Net change in unrealized (appreciation) depreciation on investments (8,117,000) 22,066,000 (48,223,000) 33,540,000
Net realized gain (loss):        
Non-controlled/non-affiliated investments (1,230,000) 195,000 7,295,000 623,000
Non-controlled/affiliated investments        
Investment income:        
Interest income 283,000 137,000 321,000 137,000
Payment-in-kind interest income 295,000 0 830,000 0
Net change in unrealized appreciation (depreciation):        
Net change in unrealized (appreciation) depreciation on investments $ (201,000) $ (1,105,000) $ (850,000) $ (793,000)
v3.25.2
Condensed Consolidated Statements of Changes in Net Assets - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Investment Company, Net Assets [Roll Forward]        
Beginning balance $ 6,240,869 $ 5,155,665 $ 6,076,521 $ 4,952,041
Issuance of Common Shares, net of offering and underwriting costs 64,012 190,135 248,842 352,133
Reinvestment of dividends 5,380 [1] 5,293 [2] 10,510 [1] 10,907 [2]
Net investment income 175,902 173,098 364,697 338,946
Net realized gain (loss) (9,560) 2,003 (4,672) 8,145
Net change in unrealized appreciation (depreciation) (11,300) 21,085 (55,174) 32,850
Dividends declared and payable from net investment income (177,007) (152,706) (352,428) (300,449)
Ending balance 6,288,296 5,394,573 6,288,296 5,394,573
Par Amount        
Investment Company, Net Assets [Roll Forward]        
Beginning balance 228 192 222 186
Issuance of Common Shares, net of offering and underwriting costs 2 6 8 12
Ending balance 230 198 230 198
Additional Paid in Capital        
Investment Company, Net Assets [Roll Forward]        
Beginning balance 5,939,716 4,869,433 5,749,762 4,701,827
Issuance of Common Shares, net of offering and underwriting costs 64,010 190,129 248,834 352,121
Reinvestment of dividends 5,380 [1] 5,293 [2] 10,510 [1] 10,907 [2]
Ending balance 6,009,106 5,064,855 6,009,106 5,064,855
Distributable Earnings (Loss)        
Investment Company, Net Assets [Roll Forward]        
Beginning balance 300,925 286,040 326,537 250,028
Net investment income 175,902 173,098 364,697 338,946
Net realized gain (loss) (9,560) 2,003 (4,672) 8,145
Net change in unrealized appreciation (depreciation) (11,300) 21,085 (55,174) 32,850
Dividends declared and payable from net investment income (177,007) (152,706) (352,428) (300,449)
Ending balance $ 278,960 $ 329,520 $ 278,960 $ 329,520
[1] The par amount of the shares is less than 1,000 and rounds to zero.
[2] The par amount of the shares is less than 1,000 and rounds to zero.
v3.25.2
Condensed Consolidated Statements of Changes in Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash flows from operating activities:    
Net increase (decrease) in net assets resulting from operations $ 304,851 $ 379,941
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 49,073 (32,747)
Net change in unrealized (appreciation) depreciation on derivative instruments 5,047 0
Net change in unrealized (appreciation) depreciation on translation of assets and liabilities in foreign currencies (1,304) (103)
Net realized (gain) loss on investments (7,295) (623)
Net change due to hedging activity (1,120) 0
Net accretion of discount and amortization of premium (27,554) (20,333)
Payment-in-kind interest capitalized (42,963) (42,693)
Amortization of deferred financing costs 2,850 3,403
Amortization of original issue discount and debt issuance costs 7,085 4,321
Purchases of investments (1,219,695) (1,609,750)
Proceeds from sale of investments and principal repayments 1,163,365 276,090
Changes in operating assets and liabilities:    
Interest receivable 7,344 (20,305)
Receivable for investments (20,438) (51,397)
Derivative instruments, net 4,380 0
Receivable from broker (6,263) (1,770)
Payable for investments (16,937) (2,193)
Due to affiliates (1,466) (447)
Management fees payable 2,295 5,060
Income based incentive fees payable (3,990) 3,007
Capital gains based incentive fees payable 0 6,256
Interest payable 11,216 4,457
Accrued expenses and other liabilities (4,877) (4,884)
Net cash provided by (used in) operating activities 203,604 (1,104,710)
Cash flows from financing activities:    
Borrowings on debt 1,062,898 1,665,849
Repayments on debt (1,134,031) (494,000)
Deferred financing costs paid (430) 0
Debt issuance costs paid (2,372) (1,070)
Dividends paid in cash (335,662) (279,888)
Proceeds from issuance of Common Shares, net of offering and underwriting costs 247,854 350,237
Net cash provided by (used in) financing activities (161,743) 1,241,128
Net increase (decrease) in cash and cash equivalents 41,861 136,418
Effect of foreign exchange rate changes on cash and cash equivalents 2,211 17
Cash and cash equivalents, beginning of period 229,606 154,857
Cash and cash equivalents, end of period 273,678 291,292
Supplemental information and non-cash activities:    
Interest paid during the period 165,186 133,658
Distribution payable 177,007 152,706
Reinvestment of distributions during the period 10,510 10,907
Accrued but unpaid debt issuance costs 250 500
Receivable for shares sold 5,393 1,896
Excise taxes paid $ 15,066 $ 11,430
Not available
v3.25.2
Condensed Consolidated Schedule of Investments (Parenthetical) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Percentage of portfolio above floor rate 89.80% 89.40%
Fair Value as % of Net Assets 210.80% 215.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 13,092,518,000  
Ending balance $ 13,252,800,000 $ 13,092,518,000
Non-controlled/non-affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 210.30% [1],[2] 214.95% [3],[4]
Unfunded commitments $ 1,866,882,000 $ 1,707,094,000
Fair Value (5,955,000) (7,253,000)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] 13,063,171,000  
Ending balance $ 13,223,290,000 [1],[2] $ 13,063,171,000 [3],[4]
Non-controlled/affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.48% [1],[2] 0.48% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 29,347,000  
Ending balance 29,510,000 [1],[2] $ 29,347,000 [3],[4]
Non-controlled/affiliated investments | Blackstone Donegal Holdings LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 6,403,000 5,790,000
Gross Additions 0 0
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) 334,000 613,000
Net Realized Gain (Loss) 0 0
Ending balance 6,737,000 6,403,000
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 21,547,000 0
Gross Additions 865,000 21,384,000
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (32,000) 163,000
Net Realized Gain (Loss) 0 0
Ending balance 22,380,000 21,547,000
Dividend and Interest Income 1,151,000 1,378,000
Non-controlled/affiliated investments | Material Holdings, LLC 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 1,397,000 0
Gross Additions 148,000 5,114,000
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (1,152,000) (3,717,000)
Net Realized Gain (Loss) 0 0
Ending balance 393,000 1,397,000
Dividend and Interest Income 0 314,000
Non-controlled/affiliated investments | Material+ Holding Company, LLC    
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
Affiliated investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 29,347,000 5,790,000
Gross Additions 1,013,000 26,498,000
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (850,000) (2,941,000)
Net Realized Gain (Loss) 0 0
Ending balance 29,510,000 29,347,000
Dividend and Interest Income $ 1,151,000 $ 1,692,000
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 14.60% 14.80%
Restricted Securities    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 210.76% 215.43%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 13,092,500,000  
Ending balance 13,251,400,000 $ 13,092,500,000
Investment, Identifier [Axis]: 123Dentist, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 1,577,000  
Ending balance [3],[4],[5],[6],[7],[8],[9]   $ 1,577,000
Investment, Identifier [Axis]: 123Dentist, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13] $ 1,602,000  
Investment, Identifier [Axis]: 123Dentist, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13],[14] $ 133,000  
Investment, Identifier [Axis]: 123Dentist, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 104,000 191,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ACI Group Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.97% [1],[2],[10],[13] 2.03% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 123,643,000  
Ending balance $ 123,713,000 [1],[2],[10],[13] $ 123,643,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: ACI Group Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[12],[13],[14] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 694,000  
Ending balance 1,909,000 [1],[2],[10],[12],[13],[14] $ 694,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: ACI Group Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 9,022,000 10,410,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[13],[15] 0.11% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 6,779,000  
Ending balance $ 6,743,000 [1],[2],[13],[15] $ 6,779,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[12],[13],[15] 0.03% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 1,625,000  
Ending balance $ 1,616,000 [1],[2],[12],[13],[15] $ 1,625,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[12],[13],[14],[15] 0.00% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 111,000  
Ending balance 111,000 [1],[2],[12],[13],[14],[15] $ 111,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,189,000 1,189,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: AGI Group Holdings LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 1,239,000  
Ending balance [3],[4],[9]   $ 1,239,000
Investment, Identifier [Axis]: AGI Group Holdings, LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 1,323,000  
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   1.55%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 94,440,000  
Ending balance [3],[4],[5],[9]   $ 94,440,000
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 1.49%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 93,889,000  
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 6,118,000  
Investment, Identifier [Axis]: AI Altius Luxembourg S.à r.l.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[12],[13],[17] 0.02% [6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [6],[8],[9] $ 1,058,000  
Ending balance $ 1,116,000 [1],[2],[12],[13],[17] $ 1,058,000 [6],[8],[9]
Investment, Identifier [Axis]: AI Altius US Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[10],[13],[14] 0.12% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 7,531,000  
Ending balance 7,531,000 [1],[2],[10],[13],[14] $ 7,531,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 500,000 500,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: AI Titan Group Holdings, LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 45,000  
Ending balance 52,000 [1],[2],[13] $ 45,000 [3],[4],[9]
Investment, Identifier [Axis]: AI Titan Parent Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 4,332,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 4,332,000
Investment, Identifier [Axis]: AI Titan Parent Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   870,000
Fair Value   (4,000)
Investment, Identifier [Axis]: AI Titan Parent Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   544,000
Fair Value   $ (5,000)
Investment, Identifier [Axis]: AI Titan Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 4,343,000  
Investment, Identifier [Axis]: AI Titan Parent, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 870,000  
Fair Value (4,000)  
Investment, Identifier [Axis]: AI Titan Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 544,000  
Fair Value $ (5,000)  
Investment, Identifier [Axis]: ALKU, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13] 0.01% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 790,000  
Ending balance $ 780,000 [1],[2],[10],[12],[13] $ 790,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: ALKU, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[10],[13] 0.43% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 26,330,000  
Ending balance $ 25,802,000 [1],[2],[10],[13] $ 26,330,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: AVE Holdings I Corp. - Series A-1 Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 679,000  
Ending balance 721,000 [1],[2],[13] $ 679,000 [3],[4],[9]
Investment, Identifier [Axis]: Abacus Holdco 2 Oy    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 748,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 748,000
Investment, Identifier [Axis]: Abacus Holdco 2 Oy, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   298,000
Fair Value   $ 0
Investment, Identifier [Axis]: Abacus Holdco 2, Oy    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 979,000  
Investment, Identifier [Axis]: Abacus Holdco 2, Oy, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 177,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Accuity Delivery Systems, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[19] 0.50%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[19] $ 31,699,000  
Investment, Identifier [Axis]: Accuity Delivery Systems, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 15,982,000  
Fair Value (80,000)  
Investment, Identifier [Axis]: Accuity Delivery Systems, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,327,000  
Fair Value (27,000)  
Investment, Identifier [Axis]: Acumatica Holdings, Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,916,000  
Fair Value 0  
Investment, Identifier [Axis]: Acumatica Holdings, Inc, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,497,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Aevex Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.74% [1],[2],[13],[15] 0.78% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 47,309,000  
Ending balance $ 46,835,000 [1],[2],[13],[15] $ 47,309,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Albireo Energy, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.19% [1],[2],[12],[13],[15] 1.22% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 73,860,000  
Ending balance $ 74,630,000 [1],[2],[12],[13],[15] $ 73,860,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Albireo Energy, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[12],[13],[15] 0.36% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 22,169,000  
Ending balance $ 22,400,000 [1],[2],[12],[13],[15] $ 22,169,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Albireo Energy, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[12],[13],[15] 0.10% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 5,981,000  
Ending balance 6,043,000 [1],[2],[12],[13],[15] $ 5,981,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Alera Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 3,628,000  
Ending balance [3],[4],[5],[9]   $ 3,628,000
Investment, Identifier [Axis]: Alera Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[12],[16]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[12],[16] $ 1,218,000  
Ending balance [3],[4],[6],[9],[12],[16]   $ 1,218,000
Investment, Identifier [Axis]: Alera Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   69,000
Fair Value   $ 0
Investment, Identifier [Axis]: Allium Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[12],[13],[14],[15] 0.03% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 1,573,000  
Ending balance 1,565,000 [1],[2],[12],[13],[14],[15] $ 1,573,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Allium Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 249,000 249,000
Fair Value $ (7,000) $ (7,000)
Investment, Identifier [Axis]: American Restoration Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[12],[13],[15] 0.08% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 4,625,000  
Ending balance $ 4,602,000 [1],[2],[12],[13],[15] $ 4,625,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[12],[13],[15] 0.02% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 1,377,000  
Ending balance $ 1,370,000 [1],[2],[12],[13],[15] $ 1,377,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[12],[13],[14],[15] 0.00% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 286,000  
Ending balance $ 762,000 [1],[2],[12],[13],[14],[15] $ 286,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[12],[13],[15] 0.04% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 2,451,000  
Ending balance $ 3,550,000 [1],[2],[12],[13],[15] $ 2,451,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 2,645,000  
Investment, Identifier [Axis]: American Restoration Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,635,000 1,105,000
Fair Value 0 0
Investment, Identifier [Axis]: American Restoration Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 547,000 1,024,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Amerilife Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.54% [1],[2],[10],[13],[14] 0.04% [3],[4],[5],[9],[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9],[12] $ 2,654,000  
Ending balance $ 96,867,000 [1],[2],[10],[13],[14] $ 2,654,000 [3],[4],[5],[9],[12]
Investment, Identifier [Axis]: Amerilife Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [12] 0.03% [1],[2],[10],[13],[14] 0.01% [3],[4],[6],[9],[20]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[12],[20] $ 357,000  
Ending balance [12] 1,889,000 [1],[2],[10],[13],[14] $ 357,000 [3],[4],[6],[9],[20]
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   340,000
Fair Value   0
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 104,000  
Fair Value 0  
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 31,555,000  
Fair Value 0  
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 14,685,000 243,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Amerivet Partners Management, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[13],[14],[15] 0.09% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 5,543,000  
Ending balance 5,443,000 [1],[2],[13],[14],[15] $ 5,543,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Amerivet Partners Management, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 589,000 589,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Anaplan, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[10],[13] 0.03% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,804,000  
Ending balance $ 20,925,000 [1],[2],[10],[13] $ 1,804,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Anaplan, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[10],[12],[13],[14] 0.32% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 19,227,000  
Ending balance 3,438,000 [1],[2],[10],[12],[13],[14] $ 19,227,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Anaplan, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 161,000 161,000
Fair Value $ (3,000) $ 0
Investment, Identifier [Axis]: Apex Companies, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[12],[13],[15] 0.18% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 10,869,000  
Ending balance $ 10,896,000 [1],[2],[12],[13],[15] $ 10,869,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Apex Companies, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[12],[13],[15] 0.03% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 1,957,000  
Ending balance $ 1,966,000 [1],[2],[12],[13],[15] $ 1,957,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Apex Companies, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[12],[13],[14],[15] 0.04% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 2,731,000  
Ending balance 2,779,000 [1],[2],[12],[13],[14],[15] $ 2,731,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Apex Companies, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,507,000 5,507,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Armada Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.42%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 25,479,000  
Ending balance [3],[4],[5],[6],[9]   $ 25,479,000
Investment, Identifier [Axis]: Armada Parent, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 744,000  
Investment, Identifier [Axis]: Armada Parent, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.40%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 25,350,000  
Investment, Identifier [Axis]: Armada Parent, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,250,000  
Fair Value 0  
Investment, Identifier [Axis]: Armada Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,250,000 3,000,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Arnhem BidCo GmbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[9],[18]   0.82%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[9],[18] $ 50,061,000  
Ending balance [3],[4],[6],[7],[9],[18]   $ 50,061,000
Investment, Identifier [Axis]: Arnhem BidCo GmbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   12,293,000
Fair Value   (58,000)
Investment, Identifier [Axis]: Arnhem BidCo, GmbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[14],[17] 0.91%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[14],[17] $ 57,505,000  
Investment, Identifier [Axis]: Arnhem BidCo, GmbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 12,332,000  
Fair Value $ (65,000)  
Investment, Identifier [Axis]: Artisan Acquisitionco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,938,000
Fair Value   $ 0
Investment, Identifier [Axis]: Artisan Acquisitionco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.89% [1],[2],[11],[13],[14],[17] 0.92% [3],[4],[6],[7],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[9],[18] $ 56,154,000  
Ending balance 56,075,000 [1],[2],[11],[13],[14],[17] $ 56,154,000 [3],[4],[6],[7],[9],[18]
Investment, Identifier [Axis]: Artisan Acquisitionco, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,938,000  
Fair Value $ (79,000)  
Investment, Identifier [Axis]: Ascend Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[10],[13],[14] 0.34% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 20,460,000  
Ending balance $ 20,354,000 [1],[2],[10],[13],[14] $ 20,460,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Ascend Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[12],[13] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 647,000  
Ending balance 1,607,000 [1],[2],[10],[12],[13] $ 647,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Ascend Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,991,000 1,293,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Auctane, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 4.35%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 273,427,000  
Investment, Identifier [Axis]: Auctane, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 3,216,000  
Investment, Identifier [Axis]: AuditBoard Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.15%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 9,138,000  
Ending balance [3],[4],[5],[6],[9]   $ 9,138,000
Investment, Identifier [Axis]: AuditBoard Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,414,000
Fair Value   (22,000)
Investment, Identifier [Axis]: AuditBoard Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,766,000
Fair Value   $ (18,000)
Investment, Identifier [Axis]: AuditBoard, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 9,220,000  
Investment, Identifier [Axis]: AuditBoard, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,414,000  
Fair Value (22,000)  
Investment, Identifier [Axis]: AuditBoard, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,766,000  
Fair Value $ (4,000)  
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. - Common Stock    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11] $ 1,430,000  
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[17] 0.18%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[17] $ 11,622,000  
Investment, Identifier [Axis]: Axsome Therapeutics, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[17] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[17] $ 6,814,000  
Investment, Identifier [Axis]: Axsome Therapeutics, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 8,805,000  
Fair Value 0  
Investment, Identifier [Axis]: Axsome Therapeutics, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 8,805,000  
Fair Value 0  
Investment, Identifier [Axis]: Azurite Intermediate Holdings Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 36,936,000  
Ending balance [3],[4],[5],[6],[9]   $ 36,936,000
Investment, Identifier [Axis]: Azurite Intermediate Holdings Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   4,104,000
Fair Value   $ 0
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.59%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 36,936,000  
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,104,000  
Fair Value $ 0  
Investment, Identifier [Axis]: BP Purchaser, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[10],[13] 0.10% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 6,338,000  
Ending balance 6,400,000 [1],[2],[10],[13] $ 6,338,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: BPPH2 Limited 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 32,925,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 32,925,000
Investment, Identifier [Axis]: BPPH2 Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 6,689,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 6,689,000
Investment, Identifier [Axis]: BPPH2 Limited 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[8],[9]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] 2,288,000  
Ending balance [3],[4],[5],[7],[8],[9]   $ 2,288,000
Investment, Identifier [Axis]: BPPH2 Limited 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[8],[9]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] 1,709,000  
Ending balance [3],[4],[5],[7],[8],[9]   $ 1,709,000
Investment, Identifier [Axis]: Baker Tilly Advisory Group LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.77%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 46,559,000  
Ending balance [3],[4],[5],[6],[9]   $ 46,559,000
Investment, Identifier [Axis]: Baker Tilly Advisory Group LP, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,034,000
Fair Value   (53,000)
Investment, Identifier [Axis]: Baker Tilly Advisory Group LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   9,856,000
Fair Value   $ 0
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.85%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 53,404,000  
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 3,390,000  
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,484,000  
Fair Value 0  
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,339,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[12],[13] 0.01% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 759,000  
Ending balance $ 707,000 [1],[2],[12],[13] $ 759,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[12],[13],[15] 0.01% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 367,000  
Ending balance $ 415,000 [1],[2],[12],[13],[15] $ 367,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 106,000  
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 146,000 43,000
Fair Value 0 0
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 132,000 146,000
Fair Value 0 0
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Delayed Draw Term Loan 3    
Schedule of Investments [Line Items]    
Unfunded commitments   146,000
Fair Value   (1,000)
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 142,000 142,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 9,321,000  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 3,148,000  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,986,000  
Fair Value 0  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 1,771,000  
Fair Value (9,000)  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 859,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Barbri Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 1.28%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 80,581,000  
Investment, Identifier [Axis]: Barbri Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   1.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 61,249,000  
Ending balance [3],[4],[5],[9]   $ 61,249,000
Investment, Identifier [Axis]: Barbri Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 19,381,000  
Ending balance [3],[4],[5],[9]   $ 19,381,000
Investment, Identifier [Axis]: Bayshore Intermediate #2 LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   1.55%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 94,115,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 94,115,000
Investment, Identifier [Axis]: Bayshore Intermediate #2 LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   4,217,000
Fair Value   (42,000)
Investment, Identifier [Axis]: Bayshore Intermediate #2 LP, Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments   5,006,000
Fair Value   $ 0
Investment, Identifier [Axis]: Bayshore Intermediate #2, LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 1.54%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 96,857,000  
Investment, Identifier [Axis]: Bayshore Intermediate #2, LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 8,116,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Bazaarvoice, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.79% [1],[2],[13],[14],[17] 4.07% [3],[4],[6],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[18] $ 247,360,000  
Ending balance 238,337,000 [1],[2],[13],[14],[17] $ 247,360,000 [3],[4],[6],[9],[18]
Investment, Identifier [Axis]: Bazaarvoice, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 37,992,000 20,255,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bending Spoons US, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[15] 0.23%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[15] $ 14,272,000  
Investment, Identifier [Axis]: Bidco 76 S.p.A.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[11],[13],[14],[17] 0.33% [3],[4],[6],[7],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[9],[18] $ 20,325,000  
Ending balance 21,566,000 [1],[2],[11],[13],[14],[17] $ 20,325,000 [3],[4],[6],[7],[9],[18]
Investment, Identifier [Axis]: Bidco 76 S.p.A., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,849,000 4,199,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Bimini Group Purchaser Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.84%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 50,912,000  
Ending balance [3],[4],[5],[9]   $ 50,912,000
Investment, Identifier [Axis]: Bimini Group Purchaser Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 2,008,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 2,008,000
Investment, Identifier [Axis]: Bimini Group Purchaser Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   18,925,000
Fair Value   (95,000)
Investment, Identifier [Axis]: Bimini Group Purchaser Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,804,000
Fair Value   $ 0
Investment, Identifier [Axis]: Bimini Group Purchaser, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 1.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 69,534,000  
Investment, Identifier [Axis]: Bimini Group Purchaser, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 4,391,000  
Investment, Identifier [Axis]: Bimini Group Purchaser, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,580,000  
Fair Value (43,000)  
Investment, Identifier [Axis]: Bimini Group Purchaser, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,337,000  
Fair Value $ 0  
Investment, Identifier [Axis]: BlackRock ICS US Treasury Fund    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2] 0.00% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 260,000  
Ending balance $ 360,000 [1],[2] $ 260,000 [3],[4]
Investment, Identifier [Axis]: Blackstone Donegal Holdings LP - LP Interest (Westland Insurance Group LTD)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[11],[13],[21] 0.11% [3],[4],[7],[9],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[22] $ 6,403,000  
Ending balance $ 6,737,000 [1],[2],[11],[13],[21] $ 6,403,000 [3],[4],[7],[9],[22]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[13] 0.03% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,950,000  
Ending balance $ 1,930,000 [1],[2],[10],[13] $ 1,950,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13] 0.01% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 344,000  
Ending balance $ 341,000 [1],[2],[10],[12],[13] $ 344,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13] 0.00% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 237,000  
Ending balance $ 234,000 [1],[2],[10],[12],[13] $ 237,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.03% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,583,000  
Ending balance $ 1,567,000 [1],[2],[10],[12],[13] $ 1,583,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Bluefin Holding, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[13],[14],[15] 0.45% [3],[4],[6],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 27,217,000  
Ending balance 27,291,000 [1],[2],[13],[14],[15] $ 27,217,000 [3],[4],[6],[9],[16]
Investment, Identifier [Axis]: Bluefin Holding, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,244,000 2,244,000
Fair Value 0 $ (6,000)
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, L.P.) - Class A Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] 0  
Ending balance [3],[4],[9]   $ 0
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, L.P.) - Class C Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 16,000  
Ending balance [3],[4],[9]   $ 16,000
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, LP) - Class A Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 0  
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, LP) - Class C Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 0  
Investment, Identifier [Axis]: Bradyplus Holdings LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4]   1.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] 97,868,000  
Ending balance [3],[4]   $ 97,868,000
Investment, Identifier [Axis]: Bradyplus Holdings LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 619,000  
Ending balance [3],[4],[6],[9],[16]   $ 619,000
Investment, Identifier [Axis]: Bradyplus Holdings LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,260,000
Fair Value   $ 0
Investment, Identifier [Axis]: Bradyplus Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 1.55%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 97,331,000  
Investment, Identifier [Axis]: Bradyplus Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 945,000  
Investment, Identifier [Axis]: Bradyplus Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,930,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Brave Parent Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.07% [1],[2],[10],[13],[14] 1.12% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 67,765,000  
Ending balance 67,447,000 [1],[2],[10],[13],[14] $ 67,765,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,058,000
Fair Value   0
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,641,000 3,641,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Brilliance Technologies, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[19] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[19] $ 1,487,000  
Investment, Identifier [Axis]: Brilliance Technologies, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[19] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[19] $ 2,388,000  
Investment, Identifier [Axis]: Brilliance Technologies, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[19] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[19] $ 2,119,000  
Investment, Identifier [Axis]: Brilliance Technologies, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,200,000  
Fair Value 0  
Investment, Identifier [Axis]: Brilliance Technologies, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 900,000  
Fair Value (5,000)  
Investment, Identifier [Axis]: CB Nike Holdco LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 36,964,000  
Ending balance [3],[4],[8],[9],[16]   $ 36,964,000
Investment, Identifier [Axis]: CB Nike Holdco LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 11,258,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 11,258,000
Investment, Identifier [Axis]: CB Nike Holdco LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   11,606,000
Fair Value   (87,000)
Investment, Identifier [Axis]: CB Nike Holdco LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   5,803,000
Fair Value   $ (87,000)
Investment, Identifier [Axis]: CB Nike Holdco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.59%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 37,002,000  
Investment, Identifier [Axis]: CCBlue Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[10],[12],[13] 0.17% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 10,382,000  
Ending balance $ 10,200,000 [1],[2],[10],[12],[13] $ 10,382,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: CCI Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.35%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 21,846,000  
Investment, Identifier [Axis]: CCI Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,289,000  
Fair Value $ (13,000)  
Investment, Identifier [Axis]: CFCo, LLC (Benefytt Technologies, Inc.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [12] 0.00% [1],[2],[13],[17],[23],[24] 0.00% [3],[4],[8],[9],[18],[25],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[12],[18],[25],[26] $ 0  
Ending balance [12] $ 0 [1],[2],[13],[17],[23],[24] $ 0 [3],[4],[8],[9],[18],[25],[26]
Investment, Identifier [Axis]: CFCo, LLC (Benefytt Technologies, Inc.) - Class B Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 0  
Ending balance $ 0 [1],[2],[13] $ 0 [3],[4],[9]
Investment, Identifier [Axis]: CFGI Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[10],[13],[14] 0.11% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 6,866,000  
Ending balance 6,827,000 [1],[2],[10],[13],[14] $ 6,866,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: CFGI Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,050,000 1,050,000
Fair Value $ (21,000) $ (21,000)
Investment, Identifier [Axis]: CFS Brands, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.05% [1],[2],[13],[14],[15] 2.02% [3],[4],[6],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 123,041,000  
Ending balance 129,003,000 [1],[2],[13],[14],[15] $ 123,041,000 [3],[4],[6],[9],[16]
Investment, Identifier [Axis]: CFS Brands, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   6,241,000
Fair Value   (62,000)
Investment, Identifier [Axis]: CFS Brands, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 18,177,000 18,177,000
Fair Value 0 $ (364,000)
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   0.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] 37,292,000  
Ending balance [3],[4],[6],[9],[16]   $ 37,292,000
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,509,000
Fair Value   $ (38,000)
Investment, Identifier [Axis]: CPI Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 27,292,000  
Ending balance [3],[4],[5],[9]   $ 27,292,000
Investment, Identifier [Axis]: CPI Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 2,913,000  
Ending balance [3],[4],[5],[8],[9]   $ 2,913,000
Investment, Identifier [Axis]: CPI Buyer, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 1,505,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 1,505,000
Investment, Identifier [Axis]: CPI Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   985,000
Fair Value   0
Investment, Identifier [Axis]: CPI Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,214,000
Fair Value   $ (64,000)
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 11,412,000  
Ending balance [3],[4],[5],[8],[9]   $ 11,412,000
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 836,000  
Ending balance [3],[4],[5],[6],[9]   $ 836,000
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,867,000
Fair Value   (14,000)
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,051,000
Fair Value   $ 0
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.18%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 11,398,000  
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,867,000  
Fair Value (14,000)  
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,912,000  
Fair Value $ 0  
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.45% [1],[2],[10],[13],[14] 0.47% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 28,322,000  
Ending balance 28,180,000 [1],[2],[10],[13],[14] $ 28,322,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 973,000 973,000
Fair Value 0 0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,433,000 2,433,000
Fair Value $ 0 $ (24,000)
Investment, Identifier [Axis]: Caerus Midco 2 S.à r.l. - Additional Vehicle Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[11],[13] 0.00% [3],[4],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9] $ 1,000  
Ending balance $ 1,000 [1],[2],[11],[13] $ 1,000 [3],[4],[7],[9]
Investment, Identifier [Axis]: Caerus Midco 2 S.à r.l. - Vehicle Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[11],[13] 0.00% [3],[4],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9] $ 54,000  
Ending balance $ 54,000 [1],[2],[11],[13] $ 54,000 [3],[4],[7],[9]
Investment, Identifier [Axis]: Caerus US 1, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[10],[11],[12],[13] 0.19% [3],[4],[5],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] $ 11,284,000  
Ending balance $ 11,227,000 [1],[2],[10],[11],[12],[13] $ 11,284,000 [3],[4],[5],[7],[8],[9]
Investment, Identifier [Axis]: Caerus US 1, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[11],[12],[13] 0.04% [3],[4],[5],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] $ 2,176,000  
Ending balance $ 2,165,000 [1],[2],[10],[11],[12],[13] $ 2,176,000 [3],[4],[5],[7],[8],[9]
Investment, Identifier [Axis]: Caerus US 1, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[11],[12],[13] 0.01% [3],[4],[5],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] $ 318,000  
Ending balance $ 317,000 [1],[2],[10],[11],[12],[13] $ 318,000 [3],[4],[5],[7],[8],[9]
Investment, Identifier [Axis]: Caerus US 1, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.79% [1],[2],[10],[11],[13] 0.82% [3],[4],[7],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[18] $ 49,714,000  
Ending balance $ 49,500,000 [1],[2],[10],[11],[13] $ 49,714,000 [3],[4],[7],[9],[18]
Investment, Identifier [Axis]: Caerus US 1, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[11],[12],[13],[14] 0.00% [3],[4],[6],[7],[8],[9],[27]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[27] $ 97,000  
Ending balance 249,000 [1],[2],[10],[11],[12],[13],[14] $ 97,000 [3],[4],[6],[7],[8],[9],[27]
Investment, Identifier [Axis]: Caerus US 1, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,038,000 1,190,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cambium Holdings, LLC - Senior Preferred Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.29% [1],[2],[13] 0.29% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 17,874,000  
Ending balance $ 18,228,000 [1],[2],[13] $ 17,874,000 [3],[4],[9]
Investment, Identifier [Axis]: Cambium Learning Group, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.53% [1],[2],[10],[13],[14] 4.71% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 286,185,000  
Ending balance 284,706,000 [1],[2],[10],[13],[14] $ 286,185,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Cambium Learning Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 43,592,000 43,592,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cambrex Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.35%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 22,105,000  
Investment, Identifier [Axis]: Cambrex Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,323,000  
Fair Value (17,000)  
Investment, Identifier [Axis]: Cambrex Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,907,000  
Fair Value (29,000)  
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 6,723,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 6,723,000
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[16]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[16] 20,100,000  
Ending balance [3],[4],[7],[8],[9],[16]   $ 20,100,000
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 1,507,000  
Ending balance [3],[4],[5],[6],[7],[8],[9]   $ 1,507,000
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,198,000
Fair Value   $ 0
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 7,155,000  
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[15] 0.34%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[15] $ 21,210,000  
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13],[14] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13],[14] $ 1,604,000  
Investment, Identifier [Axis]: Canadian Hospital Specialties, Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,232,000  
Fair Value 0  
Investment, Identifier [Axis]: Capstone Acquisition Holdings Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 5,459,000  
Ending balance [3],[4],[9],[16]   $ 5,459,000
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 5,432,000  
Investment, Identifier [Axis]: Caribou Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[9],[18]   0.73%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[9],[18] $ 44,135,000  
Ending balance [3],[4],[6],[7],[9],[18]   $ 44,135,000
Investment, Identifier [Axis]: Caribou Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,106,000
Fair Value   $ (25,000)
Investment, Identifier [Axis]: Caribou Bidco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[17] 0.86%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[17] $ 53,918,000  
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[28]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[28] 7,369,000  
Ending balance [3],[4],[8],[9],[28]   $ 7,369,000
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[28]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[28] $ 180,000  
Ending balance [3],[4],[6],[8],[9],[28]   $ 180,000
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,776,000
Fair Value   (19,000)
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,510,000
Fair Value   $ 0
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[19] 0.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[19] $ 7,388,000  
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[19] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[19] $ 771,000  
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,975,000  
Fair Value 0  
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,726,000  
Fair Value $ (9,000)  
Investment, Identifier [Axis]: Cassipoee, SASU    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 185,000  
Investment, Identifier [Axis]: Castle Management Borrower, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.38% [1],[2],[13],[14],[15] 0.38% [3],[4],[6],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 23,100,000  
Ending balance 23,858,000 [1],[2],[13],[14],[15] $ 23,100,000 [3],[4],[6],[9],[16]
Investment, Identifier [Axis]: Castle Management Borrower, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,042,000 2,917,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.31%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 19,604,000  
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 19,694,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 19,694,000
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   1,980,000
Fair Value   (10,000)
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   19,000
Fair Value   0
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,178,000 3,178,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[10],[12],[13] 0.20% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 11,927,000  
Ending balance $ 11,867,000 [1],[2],[10],[12],[13] $ 11,927,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[10],[12],[13],[14] 0.04% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 2,528,000  
Ending balance 4,062,000 [1],[2],[10],[12],[13],[14] $ 2,528,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,972,000
Fair Value   0
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 2,404,000  
Fair Value 0  
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 6,235,000  
Fair Value (16,000)  
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,522,000 1,522,000
Fair Value $ (15,000) $ (15,000)
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 1.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 86,698,000  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 9,828,000  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.22%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 14,003,000  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,629,000  
Fair Value 0  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 16,136,000  
Fair Value (81,000)  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 18,894,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 206,000  
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 63,000  
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 75,000  
Investment, Identifier [Axis]: Cielo Bidco, Ltd. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 35,000  
Investment, Identifier [Axis]: Cielo Bidco, Ltd., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 35,000  
Fair Value 0  
Investment, Identifier [Axis]: Cielo Bidco, Ltd., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 107,000  
Fair Value 0  
Investment, Identifier [Axis]: Cisive Holdings Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.14%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 8,252,000  
Ending balance [3],[4],[5],[6],[9]   $ 8,252,000
Investment, Identifier [Axis]: Cisive Holdings Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,111,000
Fair Value   $ (22,000)
Investment, Identifier [Axis]: Cisive Holdings Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 8,168,000  
Investment, Identifier [Axis]: Cisive Holdings Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,111,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Clearview Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[10],[13],[14] 0.12% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 7,276,000  
Ending balance 7,229,000 [1],[2],[10],[13],[14] $ 7,276,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Clearview Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,142,000 898,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Color Intermediate, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[10],[13] 0.33% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 19,958,000  
Ending balance $ 19,858,000 [1],[2],[10],[13] $ 19,958,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Commander Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.50%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 31,345,000  
Investment, Identifier [Axis]: Commander Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,671,000  
Fair Value (43,000)  
Investment, Identifier [Axis]: Commander Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,781,000  
Fair Value (58,000)  
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 10,087,000  
Ending balance [3],[4],[5],[8],[9]   $ 10,087,000
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 422,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 422,000
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,096,000
Fair Value   (31,000)
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,229,000
Fair Value   $ 0
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 9,626,000  
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 2,287,000  
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,994,000  
Fair Value 0  
Investment, Identifier [Axis]: Community Management Holdings Midco 2, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,158,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Community Management Holdings Parent, LP - Series A Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 310,000  
Ending balance 329,000 [1],[2],[13] $ 310,000 [3],[4],[9]
Investment, Identifier [Axis]: Compsych Investments Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 12,086,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 12,086,000
Investment, Identifier [Axis]: Compsych Investments Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,471,000
Fair Value   $ (9,000)
Investment, Identifier [Axis]: Compsych Investments Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 12,055,000  
Investment, Identifier [Axis]: Compsych Investments Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,471,000  
Fair Value $ (9,000)  
Investment, Identifier [Axis]: Confine Visual Bidco 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[11],[13],[17] 0.21% [3],[4],[7],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[18] $ 12,813,000  
Ending balance $ 12,734,000 [1],[2],[11],[13],[17] $ 12,813,000 [3],[4],[7],[9],[18]
Investment, Identifier [Axis]: Confine Visual Bidco 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[11],[12],[13],[17] 0.01% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 306,000  
Ending balance $ 304,000 [1],[2],[11],[12],[13],[17] $ 306,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: Confluence Technologies, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[19] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[19] $ 2,182,000  
Investment, Identifier [Axis]: Connatix Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[10],[13] 0.34% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 20,937,000  
Ending balance $ 20,928,000 [1],[2],[10],[13] $ 20,937,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[10],[12],[13],[14] 0.02% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,332,000  
Ending balance $ 2,308,000 [1],[2],[10],[12],[13],[14] $ 1,332,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13],[14] 0.02% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,120,000  
Ending balance 1,273,000 [1],[2],[10],[12],[13],[14] $ 1,120,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Connatix Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 848,000 1,015,000
Fair Value 0 0
Investment, Identifier [Axis]: Connatix Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,042,000 3,976,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Connatix Parent, LLC - Class L Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 209,000  
Ending balance $ 209,000 [1],[2],[13] $ 209,000 [3],[4],[9]
Investment, Identifier [Axis]: Consor Intermediate II, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[10],[12],[13],[14] 0.07% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 4,371,000  
Ending balance 5,992,000 [1],[2],[10],[12],[13],[14] $ 4,371,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Consor Intermediate II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,218,000 4,002,000
Fair Value 0 (20,000)
Investment, Identifier [Axis]: Consor Intermediate II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 213,000 1,067,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Continental Buyer Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 18,360,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 18,360,000
Investment, Identifier [Axis]: Continental Buyer Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,239,000
Fair Value   (54,000)
Investment, Identifier [Axis]: Continental Buyer Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,715,000
Fair Value   $ 0
Investment, Identifier [Axis]: Continental Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.42%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 26,373,000  
Investment, Identifier [Axis]: Continental Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,729,000  
Fair Value 0  
Investment, Identifier [Axis]: Continental Buyer, Inc., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 2,715,000  
Fair Value 0  
Investment, Identifier [Axis]: Continental Buyer, Inc., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 4,350,000  
Fair Value (22,000)  
Investment, Identifier [Axis]: Corfin Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   4.35%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 264,053,000  
Ending balance [3],[4],[5],[9]   $ 264,053,000
Investment, Identifier [Axis]: Corfin Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 4.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 261,327,000  
Investment, Identifier [Axis]: Corfin Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 1,564,000  
Investment, Identifier [Axis]: Corfin Holdings, Inc., Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,636,000
Fair Value   $ 0
Investment, Identifier [Axis]: Coupa Software Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 1,825,000  
Ending balance [3],[4],[5],[6],[7],[8],[9]   $ 1,825,000
Investment, Identifier [Axis]: Coupa Software Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   164,000
Fair Value   (2,000)
Investment, Identifier [Axis]: Coupa Software Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   126,000
Fair Value   $ 0
Investment, Identifier [Axis]: Coupa Software, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13],[14] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13],[14] $ 1,816,000  
Investment, Identifier [Axis]: Coupa Software, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 164,000  
Fair Value (2,000)  
Investment, Identifier [Axis]: Coupa Software, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 126,000  
Fair Value 0  
Investment, Identifier [Axis]: Creek Parent Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   1.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 67,421,000  
Ending balance [3],[4],[5],[6],[9]   $ 67,421,000
Investment, Identifier [Axis]: Creek Parent Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   9,893,000
Fair Value   $ (173,000)
Investment, Identifier [Axis]: Creek Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 1.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 67,939,000  
Investment, Identifier [Axis]: Creek Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 9,893,000  
Fair Value $ (173,000)  
Investment, Identifier [Axis]: Crewline Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.98% [1],[2],[13],[14],[15] 1.01% [3],[4],[6],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 61,615,000  
Ending balance 61,615,000 [1],[2],[13],[14],[15] $ 61,615,000 [3],[4],[6],[9],[16]
Investment, Identifier [Axis]: Crewline Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,438,000 6,438,000
Fair Value $ (31,000) $ (31,000)
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 1.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 71,173,000  
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.23%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 14,758,000  
Investment, Identifier [Axis]: Cronos Crimson Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.28%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 17,647,000  
Investment, Identifier [Axis]: Crumbl Enterprises, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 1,485,000  
Investment, Identifier [Axis]: Crumbl Enterprises, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 18,000  
Investment, Identifier [Axis]: Crumbl Enterprises, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 101,000  
Fair Value 0  
Investment, Identifier [Axis]: Cumming Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   1.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 87,227,000  
Ending balance [3],[4],[9],[16]   $ 87,227,000
Investment, Identifier [Axis]: Cumming Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 9,487,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 9,487,000
Investment, Identifier [Axis]: Cumming Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,161,000
Fair Value   0
Investment, Identifier [Axis]: Cumming Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   9,648,000
Fair Value   $ 0
Investment, Identifier [Axis]: CustomInk, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.80% [1],[2],[13],[15],[24] 2.69% [3],[4],[9],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16],[26] $ 163,594,000  
Ending balance $ 175,836,000 [1],[2],[13],[15],[24] $ 163,594,000 [3],[4],[9],[16],[26]
Investment, Identifier [Axis]: CustomInk, LLC - Series A Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[13] 0.13% [3],[4],[29]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[29] $ 7,844,000  
Ending balance $ 6,368,000 [1],[2],[13] $ 7,844,000 [3],[4],[29]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.49% [1],[2],[10],[13] 0.52% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 31,506,000  
Ending balance $ 30,553,000 [1],[2],[10],[13] $ 31,506,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13] 0.02% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 955,000  
Ending balance $ 926,000 [1],[2],[10],[12],[13] $ 955,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   29,000
Fair Value   $ 0
Investment, Identifier [Axis]: DCG Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[2],[10],[13],[14] 0.58% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 35,327,000  
Ending balance 38,594,000 [1],[2],[10],[13],[14] $ 35,327,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: DCG Acquisition Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,375,000 5,937,000
Fair Value 0 (30,000)
Investment, Identifier [Axis]: DCG Acquisition Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,937,000 5,937,000
Fair Value (59,000) $ (59,000)
Investment, Identifier [Axis]: DM Intermediate Parent LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.29%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 17,811,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 17,811,000
Investment, Identifier [Axis]: DM Intermediate Parent LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,809,000
Fair Value   (59,000)
Investment, Identifier [Axis]: DM Intermediate Parent LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   5,206,000
Fair Value   $ (78,000)
Investment, Identifier [Axis]: DM Intermediate Parent, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.29%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 17,994,000  
Investment, Identifier [Axis]: DM Intermediate Parent, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,809,000  
Fair Value (59,000)  
Investment, Identifier [Axis]: DM Intermediate Parent, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,206,000  
Fair Value (78,000)  
Investment, Identifier [Axis]: DTA Intermediate II Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[27]   0.70%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[27] 42,754,000  
Ending balance [3],[4],[9],[27]   $ 42,754,000
Investment, Identifier [Axis]: DTA Intermediate II Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 5,196,000  
Ending balance [3],[4],[6],[9],[16]   $ 5,196,000
Investment, Identifier [Axis]: DTA Intermediate II Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   14,000,000
Fair Value   0
Investment, Identifier [Axis]: DTA Intermediate II Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   10,769,000
Fair Value   $ 0
Investment, Identifier [Axis]: DTA Intermediate II, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.67%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 41,900,000  
Investment, Identifier [Axis]: DTA Intermediate II, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 4,902,000  
Investment, Identifier [Axis]: DTA Intermediate II, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 14,000,000  
Fair Value 0  
Investment, Identifier [Axis]: DTA Intermediate II, Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,769,000  
Fair Value (162,000)  
Investment, Identifier [Axis]: DTA LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 2,171,000  
Ending balance [3],[4],[9]   $ 2,171,000
Investment, Identifier [Axis]: DTA, LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 1,845,000  
Investment, Identifier [Axis]: Daylight Beta Parent, LLC (Benefytt Technologies, Inc.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [12] 0.01% [1],[2],[13],[17],[23],[24] 0.02% [3],[4],[8],[9],[18],[25],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[12],[18],[25],[26] $ 1,381,000  
Ending balance [12] 854,000 [1],[2],[13],[17],[23],[24] $ 1,381,000 [3],[4],[8],[9],[18],[25],[26]
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] 1,062,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 1,062,000
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] 1,032,000  
Ending balance [3],[4],[5],[6],[7],[8],[9]   $ 1,032,000
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   260,000
Fair Value   (3,000)
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   218,000
Fair Value   $ (3,000)
Investment, Identifier [Axis]: Dellner Couplers Group AB    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[18]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[18] $ 1,026,000  
Ending balance [3],[4],[7],[8],[18]   $ 1,026,000
Investment, Identifier [Axis]: Dellner Couplers Group, AB    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[17] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[17] $ 1,184,000  
Investment, Identifier [Axis]: Denali Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[16]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[16] 5,033,000  
Ending balance [3],[4],[6],[7],[8],[9],[16]   $ 5,033,000
Investment, Identifier [Axis]: Denali Bidco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 1,207,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 1,207,000
Investment, Identifier [Axis]: Denali Bidco Ltd 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 273,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 273,000
Investment, Identifier [Axis]: Denali Bidco Ltd 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 1,691,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 1,691,000
Investment, Identifier [Axis]: Denali Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   300,000
Fair Value   $ (3,000)
Investment, Identifier [Axis]: Denali Bidco, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13],[14] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13],[14] $ 5,518,000  
Investment, Identifier [Axis]: Denali Bidco, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 1,373,000  
Investment, Identifier [Axis]: Denali Bidco, Ltd. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 310,000  
Investment, Identifier [Axis]: Denali Bidco, Ltd. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 1,923,000  
Investment, Identifier [Axis]: Denali Bidco, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 300,000  
Fair Value (3,000)  
Investment, Identifier [Axis]: Descartes Holdings, Inc - Class A Common Stock    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 3,000  
Ending balance [3],[4],[9]   $ 3,000
Investment, Identifier [Axis]: Descartes Holdings, Inc. - Class A Common Stock    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 0  
Investment, Identifier [Axis]: Diligent Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.82%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 49,683,000  
Ending balance [3],[4],[5],[9]   $ 49,683,000
Investment, Identifier [Axis]: Diligent Corp 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.14%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 8,517,000  
Ending balance [3],[4],[5],[9]   $ 8,517,000
Investment, Identifier [Axis]: Diligent Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.79%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 49,683,000  
Investment, Identifier [Axis]: Diligent Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 8,517,000  
Investment, Identifier [Axis]: Discovery Education, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.45% [1],[2],[10],[13] 0.45% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 27,596,000  
Ending balance $ 28,172,000 [1],[2],[10],[13] $ 27,596,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Discovery Education, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[10],[12],[13] 0.03% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,726,000  
Ending balance $ 2,479,000 [1],[2],[10],[12],[13] $ 1,726,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Discovery Education, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[10],[12],[13] 0.05% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 3,106,000  
Ending balance $ 3,170,000 [1],[2],[10],[12],[13] $ 3,106,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Discovery Education, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   767,000
Fair Value   $ 0
Investment, Identifier [Axis]: Divisions Holding Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 1,593,000  
Investment, Identifier [Axis]: Divisions Holding Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 140,000  
Fair Value (1,000)  
Investment, Identifier [Axis]: Doc Generici (Diocle S.p.A.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 1,808,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 1,808,000
Investment, Identifier [Axis]: Doc Generici (Diocle S.p.A.), Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,682,000
Fair Value   $ (13,000)
Investment, Identifier [Axis]: Doit International, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.18%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 11,229,000  
Investment, Identifier [Axis]: Doit International, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,606,000  
Fair Value (87,000)  
Investment, Identifier [Axis]: Doit International, Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,803,000  
Fair Value $ (87,000)  
Investment, Identifier [Axis]: Dolcetto Holdco S.p.A. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 2,071,000  
Investment, Identifier [Axis]: Dolcetto Holdco S.p.A. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 2,066,000  
Investment, Identifier [Axis]: Dropbox Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[8],[9]   0.43%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] 26,150,000  
Ending balance [3],[4],[5],[7],[8],[9]   $ 26,150,000
Investment, Identifier [Axis]: Dropbox Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9],[26]   0.57%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9],[26] $ 34,426,000  
Ending balance [3],[4],[5],[6],[7],[8],[9],[26]   $ 34,426,000
Investment, Identifier [Axis]: Dropbox Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   88,235,000
Fair Value   $ (441,000)
Investment, Identifier [Axis]: Dropbox, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[13],[14],[24] 0.55%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[13],[14],[24] $ 34,325,000  
Investment, Identifier [Axis]: Dropbox, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 88,235,000  
Fair Value (441,000)  
Investment, Identifier [Axis]: Duro Dyne National Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.55%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 33,185,000  
Ending balance [3],[4],[5],[6],[9]   $ 33,185,000
Investment, Identifier [Axis]: Duro Dyne National Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   6,002,000
Fair Value   (30,000)
Investment, Identifier [Axis]: Duro Dyne National Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   6,002,000
Fair Value   $ (60,000)
Investment, Identifier [Axis]: Duro Dyne National Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.53%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 33,443,000  
Investment, Identifier [Axis]: Duro Dyne National Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 450,000  
Investment, Identifier [Axis]: Duro Dyne National Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,002,000  
Fair Value (30,000)  
Investment, Identifier [Axis]: Duro Dyne National Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,522,000  
Fair Value 0  
Investment, Identifier [Axis]: Dwyer Instruments LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 8,150,000  
Ending balance [3],[4],[5],[8],[9]   $ 8,150,000
Investment, Identifier [Axis]: Dwyer Instruments LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 167,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 167,000
Investment, Identifier [Axis]: Dwyer Instruments LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,069,000
Fair Value   (5,000)
Investment, Identifier [Axis]: Dwyer Instruments LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,098,000
Fair Value   $ 0
Investment, Identifier [Axis]: Dwyer Instruments, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 8,316,000  
Investment, Identifier [Axis]: Dwyer Instruments, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,069,000  
Fair Value (5,000)  
Investment, Identifier [Axis]: Dwyer Instruments, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,106,000  
Fair Value $ 0  
Investment, Identifier [Axis]: EIS Acquisition Holdings, LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[13] 0.14% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 8,752,000  
Ending balance $ 6,920,000 [1],[2],[13] $ 8,752,000 [3],[4],[9]
Investment, Identifier [Axis]: ELK Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[19] 0.28%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[19] $ 17,871,000  
Investment, Identifier [Axis]: ELK Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,747,000  
Fair Value (9,000)  
Investment, Identifier [Axis]: ELK Bidco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,373,000  
Fair Value $ (17,000)  
Investment, Identifier [Axis]: EMB Purchaser, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.43%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 27,178,000  
Investment, Identifier [Axis]: EMB Purchaser, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 6,184,000  
Investment, Identifier [Axis]: EMB Purchaser, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,089,000  
Fair Value 0  
Investment, Identifier [Axis]: EMB Purchaser, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,294,000  
Fair Value (33,000)  
Investment, Identifier [Axis]: ENV Bidco AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] 1,115,000  
Ending balance [3],[4],[5],[7],[8],[9]   $ 1,115,000
Investment, Identifier [Axis]: ENV Bidco AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 1,381,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 1,381,000
Investment, Identifier [Axis]: ENV Bidco AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   302,000
Fair Value   $ 0
Investment, Identifier [Axis]: ENV Bidco, AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13] $ 1,115,000  
Investment, Identifier [Axis]: ENV Bidco, AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 1,571,000  
Investment, Identifier [Axis]: ENV Bidco, AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 302,000  
Fair Value (4,000)  
Investment, Identifier [Axis]: Eagle Midstream Canada Finance Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[9]   0.81%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[9] $ 49,396,000  
Ending balance [3],[4],[5],[7],[9]   $ 49,396,000
Investment, Identifier [Axis]: Eagle Midstream Canada Finance, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[13] 0.79%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[13] $ 49,396,000  
Investment, Identifier [Axis]: East River Bidco, GmbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[14],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[14],[17] $ 104,000  
Investment, Identifier [Axis]: East River Bidco, GmbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 39,000  
Fair Value 0  
Investment, Identifier [Axis]: Eden Acquisitionco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[9]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[9] $ 19,787,000  
Ending balance [3],[4],[5],[6],[7],[9]   $ 19,787,000
Investment, Identifier [Axis]: Eden Acquisitionco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   43,344,000
Fair Value   $ (601,000)
Investment, Identifier [Axis]: Eden Acquisitionco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[13],[14] 0.54%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[13],[14] $ 34,013,000  
Investment, Identifier [Axis]: Eden Acquisitionco, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 29,230,000  
Fair Value (472,000)  
Investment, Identifier [Axis]: Edifecs, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.22%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 13,572,000  
Ending balance [3],[4],[5],[9]   $ 13,572,000
Investment, Identifier [Axis]: Edifecs, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   3.60%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 218,935,000  
Ending balance [3],[4],[9],[16]   $ 218,935,000
Investment, Identifier [Axis]: Edison Bidco AS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 342,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 342,000
Investment, Identifier [Axis]: Edison Bidco AS, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   655,000
Fair Value   0
Investment, Identifier [Axis]: Edison Bidco AS, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   1,875,000
Fair Value   $ 0
Investment, Identifier [Axis]: Edison Bidco, AS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 336,000  
Investment, Identifier [Axis]: Edison Bidco, AS, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 687,000  
Fair Value 0  
Investment, Identifier [Axis]: Edison Bidco, AS, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 3,161,000  
Fair Value $ (53,000)  
Investment, Identifier [Axis]: Elanco Animal Health, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[17] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[17] $ 883,000  
Investment, Identifier [Axis]: Elements Finco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 5,008,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 5,008,000
Investment, Identifier [Axis]: Elements Finco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 24,065,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 24,065,000
Investment, Identifier [Axis]: Elements Finco Ltd 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 6,017,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 6,017,000
Investment, Identifier [Axis]: Elements Finco Ltd 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 10,788,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 10,788,000
Investment, Identifier [Axis]: Elements Finco Ltd 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 4,436,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 4,436,000
Investment, Identifier [Axis]: Elements Finco, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 5,008,000  
Investment, Identifier [Axis]: Elements Finco, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.42%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 26,698,000  
Investment, Identifier [Axis]: Elements Finco, Ltd. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 6,081,000  
Investment, Identifier [Axis]: Elements Finco, Ltd. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 11,965,000  
Investment, Identifier [Axis]: Elements Finco, Ltd. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 4,918,000  
Investment, Identifier [Axis]: Emergency Power Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   0.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 45,809,000  
Ending balance [3],[4],[6],[9],[16]   $ 45,809,000
Investment, Identifier [Axis]: Emergency Power Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.74%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 46,582,000  
Investment, Identifier [Axis]: Emergency Power Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 13,589,000 14,586,000
Fair Value $ (136,000) $ (146,000)
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[13],[15] 0.35% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 21,413,000  
Ending balance $ 20,324,000 [1],[2],[13],[15] $ 21,413,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[12],[13],[15] 0.06% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 3,885,000  
Ending balance $ 3,741,000 [1],[2],[12],[13],[15] $ 3,885,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,776,000
Fair Value   $ 0
Investment, Identifier [Axis]: Epoch Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.38% [1],[2],[13],[15] 0.39% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 23,807,000  
Ending balance 23,674,000 [1],[2],[13],[15] $ 23,807,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Essential Services Holding Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 11,687,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 11,687,000
Investment, Identifier [Axis]: Essential Services Holding Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,297,000
Fair Value   (11,000)
Investment, Identifier [Axis]: Essential Services Holding Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,436,000
Fair Value   $ (14,000)
Investment, Identifier [Axis]: Essential Services Holding Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 11,746,000  
Investment, Identifier [Axis]: Essential Services Holding Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,297,000  
Fair Value (11,000)  
Investment, Identifier [Axis]: Essential Services Holding Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,264,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Everbridge Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[2],[10],[11],[13] 0.36% [3],[4],[5],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[9] $ 22,167,000  
Ending balance $ 22,111,000 [1],[2],[10],[11],[13] $ 22,167,000 [3],[4],[5],[7],[9]
Investment, Identifier [Axis]: Everbridge Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[11],[12],[13],[14] 0.04% [3],[4],[5],[6],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 2,158,000  
Ending balance 2,167,000 [1],[2],[10],[11],[12],[13],[14] $ 2,158,000 [3],[4],[5],[6],[7],[8],[9]
Investment, Identifier [Axis]: Everbridge Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,378,000 3,378,000
Fair Value 0 0
Investment, Identifier [Axis]: Everbridge Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,222,000 2,222,000
Fair Value $ 0 $ (6,000)
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 48,000  
Ending balance $ 49,000 [1],[2],[13] $ 48,000 [3],[4],[9]
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 14,000  
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class B Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 14,000  
Ending balance [3],[4],[9]   $ 14,000
Investment, Identifier [Axis]: Experity, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[10],[12],[13] 0.19% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 11,845,000  
Ending balance $ 12,055,000 [1],[2],[10],[12],[13] $ 11,845,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Experity, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[10],[12],[13],[14] 0.06% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 3,785,000  
Ending balance 3,857,000 [1],[2],[10],[12],[13],[14] $ 3,785,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Experity, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 234,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 234,000
Investment, Identifier [Axis]: Experity, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,457,000 4,457,000
Fair Value (22,000) (22,000)
Investment, Identifier [Axis]: Experity, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,495,000 1,238,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[10],[12],[13],[14] 0.23% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 14,252,000  
Ending balance 22,396,000 [1],[2],[10],[12],[13],[14] $ 14,252,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,699,000 4,470,000
Fair Value 0 (34,000)
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,669,000 2,669,000
Fair Value $ (40,000) $ (40,000)
Investment, Identifier [Axis]: Falcon Top Parent, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 773,000  
Ending balance $ 773,000 [1],[2],[13] $ 773,000 [3],[4],[9]
Investment, Identifier [Axis]: Fastener Distribution Holdings LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.49% [1],[2],[10],[13],[14] 0.50% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 30,647,000  
Ending balance 30,648,000 [1],[2],[10],[13],[14] $ 30,647,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Fastener Distribution Holdings LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   11,594,000
Fair Value   $ (58,000)
Investment, Identifier [Axis]: Fastener Distribution Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,594,000  
Fair Value $ (58,000)  
Investment, Identifier [Axis]: Fencing Supply Group Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.81% [1],[2],[13],[15] 0.85% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 51,688,000  
Ending balance 50,761,000 [1],[2],[13],[15] $ 51,688,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Fern Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.41%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 25,117,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 25,117,000
Investment, Identifier [Axis]: Fern Bidco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 2,623,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 2,623,000
Investment, Identifier [Axis]: Fern Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   10,035,000
Fair Value   $ 0
Investment, Identifier [Axis]: Fern Bidco, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.44%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 27,401,000  
Investment, Identifier [Axis]: Fern Bidco, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 2,806,000  
Investment, Identifier [Axis]: Fern Bidco, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,035,000  
Fair Value 0  
Investment, Identifier [Axis]: Formulations Parent Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.14%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 8,408,000  
Ending balance [3],[4],[5],[6],[9]   $ 8,408,000
Investment, Identifier [Axis]: Formulations Parent Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,429,000
Fair Value   $ (14,000)
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[10],[13] 0.24% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 14,433,000  
Ending balance $ 14,359,000 [1],[2],[10],[13] $ 14,433,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[10],[13] 0.08% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 4,785,000  
Ending balance $ 4,760,000 [1],[2],[10],[13] $ 4,785,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[10],[13] 0.11% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 6,892,000  
Ending balance $ 6,857,000 [1],[2],[10],[13] $ 6,892,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[10],[12],[13],[14] 0.04% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 2,275,000  
Ending balance 4,236,000 [1],[2],[10],[12],[13],[14] $ 2,275,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,245,000
Fair Value   0
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 252,000  
Fair Value 0  
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 7,140,000  
Fair Value (18,000)  
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,101,000 4,101,000
Fair Value (62,000) $ (62,000)
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 2,347,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 2,347,000
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 2,335,000  
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 354,000  
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 516,000 516,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Frontline Road Safety Investments, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 7,460,000  
Ending balance [3],[4],[9]   $ 7,460,000
Investment, Identifier [Axis]: Frontline Road Safety, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[13],[17] 1.54% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 93,849,000  
Ending balance $ 14,941,000 [1],[2],[13],[17] $ 93,849,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Frontline Road Safety, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[12],[13],[14],[17] 0.18% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 10,969,000  
Ending balance 5,746,000 [1],[2],[12],[13],[14],[17] $ 10,969,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Frontline Road Safety, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] 10,919,000  
Ending balance [3],[4],[5],[6],[9]   $ 10,919,000
Investment, Identifier [Axis]: Frontline Road Safety, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,835,000 33,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Frontline Road Safety, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,004,000  
Fair Value $ 0  
Investment, Identifier [Axis]: FusionSite Midco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.91%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 57,501,000  
Investment, Identifier [Axis]: FusionSite Midco, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.42%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 25,721,000  
Ending balance [3],[4],[9],[16]   $ 25,721,000
Investment, Identifier [Axis]: FusionSite Midco, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 11,124,000  
Ending balance [3],[4],[9],[16]   $ 11,124,000
Investment, Identifier [Axis]: FusionSite Midco, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] 19,889,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 19,889,000
Investment, Identifier [Axis]: FusionSite Midco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 23,773,000 1,276,000
Fair Value (178,000) 0
Investment, Identifier [Axis]: FusionSite Midco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,006,000 4,209,000
Fair Value $ (158,000) $ (95,000)
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[10],[13] 0.50% [3],[4],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[28] $ 30,095,000  
Ending balance $ 33,609,000 [1],[2],[10],[13] $ 30,095,000 [3],[4],[9],[28]
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[10],[12],[13] 0.02% [3],[4],[6],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[28] $ 1,058,000  
Ending balance $ 20,665,000 [1],[2],[10],[12],[13] $ 1,058,000 [3],[4],[6],[8],[9],[28]
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 592,000  
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,811,000 11,967,000
Fair Value 0 0
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,288,000 3,288,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[10],[13] 0.35% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 20,966,000  
Ending balance $ 20,649,000 [1],[2],[10],[13] $ 20,966,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[10],[13] 0.09% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 5,309,000  
Ending balance $ 5,228,000 [1],[2],[10],[13] $ 5,309,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: GCX Corporation Group Holdings, L.P. - Class A-2 Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 291,000  
Ending balance $ 270,000 [1],[2],[13] $ 291,000 [3],[4],[9]
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.26%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 16,218,000  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] 134,000  
Ending balance [3],[4],[5],[6],[9]   $ 134,000
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.27%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] 16,220,000  
Ending balance [3],[4],[5],[6],[9]   $ 16,220,000
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,200,000 1,060,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: GS Acquisitionco Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 577,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 577,000
Investment, Identifier [Axis]: GS Acquisitionco Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[28]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[28] $ 5,295,000  
Ending balance [3],[4],[6],[8],[9],[28]   $ 5,295,000
Investment, Identifier [Axis]: GS Acquisitionco Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,053,000
Fair Value   0
Investment, Identifier [Axis]: GS Acquisitionco Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,000,000
Fair Value   $ (10,000)
Investment, Identifier [Axis]: GS Acquisitionco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 1,104,000  
Investment, Identifier [Axis]: GS Acquisitionco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 5,277,000  
Investment, Identifier [Axis]: GS Acquisitionco, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,653,000  
Fair Value 0  
Investment, Identifier [Axis]: GS Acquisitionco, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 1,429,000  
Fair Value (4,000)  
Investment, Identifier [Axis]: GS Acquisitionco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,852,000  
Fair Value 0  
Investment, Identifier [Axis]: GTCR Investors LP - Class A-1 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 465,000  
Ending balance [3],[4],[9]   $ 465,000
Investment, Identifier [Axis]: GTCR Investors, LP - Class A-1 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 500,000  
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Blocker Note    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 6,000  
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Blocker Notes    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 6,000  
Ending balance [3],[4],[9]   $ 6,000
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Class Z Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 57,000  
Ending balance $ 63,000 [1],[2],[13] $ 57,000 [3],[4],[9]
Investment, Identifier [Axis]: Galway Borrower, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[10],[12],[13] 0.24% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 14,788,000  
Ending balance $ 14,705,000 [1],[2],[10],[12],[13] $ 14,788,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Galway Borrower, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[10],[12],[13],[14] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 834,000  
Ending balance $ 2,855,000 [1],[2],[10],[12],[13],[14] $ 834,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Galway Borrower, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[10],[12],[13],[14] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 691,000  
Ending balance 8,699,000 [1],[2],[10],[12],[13],[14] $ 691,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Galway Borrower, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 44,509,000 52,181,000
Fair Value 0 0
Investment, Identifier [Axis]: Galway Borrower, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,247,000 8,341,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Gannett Fleming Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   1.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 61,655,000  
Ending balance [3],[4],[5],[6],[9]   $ 61,655,000
Investment, Identifier [Axis]: Gannett Fleming Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   6,237,000
Fair Value   (94,000)
Investment, Identifier [Axis]: Gannett Fleming, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 1.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 64,196,000  
Investment, Identifier [Axis]: Gannett Fleming, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,237,000  
Fair Value $ (94,000)  
Investment, Identifier [Axis]: Gatekeeper Systems Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   10,584,000
Fair Value   (106,000)
Investment, Identifier [Axis]: Gatekeeper Systems Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,588,000
Fair Value   $ 0
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.69% [1],[2],[10],[13] 0.73% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 44,114,000  
Ending balance $ 43,451,000 [1],[2],[10],[13] $ 44,114,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[10],[12],[13],[14] 0.02% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,458,000  
Ending balance 4,704,000 [1],[2],[10],[12],[13],[14] $ 1,458,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Gatekeeper Systems, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,218,000  
Fair Value 0  
Investment, Identifier [Axis]: Gatekeeper Systems, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,588,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Blocker Note    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 9,000  
Ending balance $ 9,000 [1],[2],[13] $ 9,000 [3],[4],[9]
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Blocker Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 336,000  
Ending balance $ 368,000 [1],[2],[13] $ 336,000 [3],[4],[9]
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Class Z Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 79,000  
Ending balance $ 87,000 [1],[2],[13] $ 79,000 [3],[4],[9]
Investment, Identifier [Axis]: Genuine Cable Group, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.48% [1],[2],[10],[13] 2.60% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 158,176,000  
Ending balance 155,703,000 [1],[2],[10],[13] $ 158,176,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Gigamon Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 6,798,000  
Ending balance [3],[4],[9],[16]   $ 6,798,000
Investment, Identifier [Axis]: Gigamon Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 410,000  
Ending balance [3],[4],[5],[8],[9]   $ 410,000
Investment, Identifier [Axis]: Gigamon, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 6,690,000  
Investment, Identifier [Axis]: Gigamon, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 318,000  
Investment, Identifier [Axis]: Gigamon, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 87,000  
Fair Value 0  
Investment, Identifier [Axis]: Gimlet Bidco GmbH 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[9],[18]   0.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[18] 31,242,000  
Ending balance [3],[4],[7],[9],[18]   $ 31,242,000
Investment, Identifier [Axis]: Gimlet Bidco GmbH 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[9],[18]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[9],[18] $ 4,946,000  
Ending balance [3],[4],[6],[7],[9],[18]   $ 4,946,000
Investment, Identifier [Axis]: Gimlet Bidco GmbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   8,040,000
Fair Value   $ 0
Investment, Identifier [Axis]: Gimlet Bidco, GmbH 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[17] 0.57%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[17] $ 36,069,000  
Investment, Identifier [Axis]: Gimlet Bidco, GmbH 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[14],[17] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[14],[17] $ 10,223,000  
Investment, Identifier [Axis]: Gimlet Bidco, GmbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,063,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Go Car Wash Management Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[13],[15] 0.36% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 21,717,000  
Ending balance 21,606,000 [1],[2],[13],[15] $ 21,717,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Gorilla Investor LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.41%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 24,695,000  
Ending balance [3],[4],[5],[9]   $ 24,695,000
Investment, Identifier [Axis]: Gorilla Investor, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.39%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 24,557,000  
Investment, Identifier [Axis]: GovernmentJobs.com, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[10],[13],[14] 0.14% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 8,447,000  
Ending balance 8,620,000 [1],[2],[10],[13],[14] $ 8,447,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: GovernmentJobs.com, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,086,000 2,086,000
Fair Value 0 0
Investment, Identifier [Axis]: GovernmentJobs.com, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 956,000 1,153,000
Fair Value 0 $ (18,000)
Investment, Identifier [Axis]: Granicus Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.29%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 17,509,000  
Ending balance [3],[4],[5],[9]   $ 17,509,000
Investment, Identifier [Axis]: Granicus Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 4,665,000  
Ending balance [3],[4],[5],[6],[9]   $ 4,665,000
Investment, Identifier [Axis]: Granicus Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   817,000
Fair Value   (4,000)
Investment, Identifier [Axis]: Granicus Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,448,000
Fair Value   $ 0
Investment, Identifier [Axis]: Granicus, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.28%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 17,618,000  
Investment, Identifier [Axis]: Granicus, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 4,741,000  
Investment, Identifier [Axis]: Granicus, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 339,000  
Investment, Identifier [Axis]: Granicus, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 817,000  
Fair Value (4,000)  
Investment, Identifier [Axis]: Granicus, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,105,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Graphpad Software, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.38% [1],[2],[10],[13] 0.40% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 24,085,000  
Ending balance $ 23,964,000 [1],[2],[10],[13] $ 24,085,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Graphpad Software, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13],[14] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 591,000  
Ending balance 588,000 [1],[2],[10],[12],[13],[14] $ 591,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Graphpad Software, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,433,000 5,433,000
Fair Value 0 0
Investment, Identifier [Axis]: Graphpad Software, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,264,000 2,264,000
Fair Value (11,000) (11,000)
Investment, Identifier [Axis]: Grid Alliance Partners LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,718,000  
Fair Value 0  
Investment, Identifier [Axis]: Grid Alliance Partners LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,949,000  
Fair Value 0  
Investment, Identifier [Axis]: Grid Alliance Partners LLC, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 15,333,000  
Fair Value 0  
Investment, Identifier [Axis]: Griffon Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,031,000  
Fair Value 0  
Investment, Identifier [Axis]: Griffon Bidco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,031,000  
Fair Value 0  
Investment, Identifier [Axis]: Griffon Bidco, Inc., Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 22,170,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   563,000
Fair Value   0
Investment, Identifier [Axis]: Ground Penetrating Radar Systems LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   300,000
Fair Value   0
Investment, Identifier [Axis]: Ground Penetrating Radar Systems LLC, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,929,000
Fair Value   $ 0
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 2,936,000  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 52,000  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 569,000  
Fair Value (3,000)  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 247,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Guidehouse, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.97% [1],[2],[10],[13] 5.12% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 311,085,000  
Ending balance 312,623,000 [1],[2],[10],[13] $ 311,085,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Gusto Sing Bidco Pte Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 612,000  
Ending balance [3],[4],[5],[6],[7],[8],[9]   $ 612,000
Investment, Identifier [Axis]: Gusto Sing Bidco Pte Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   101,000
Fair Value   0
Investment, Identifier [Axis]: Gusto Sing Bidco Pte, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13],[14] $ 653,000  
Investment, Identifier [Axis]: Gusto Sing Bidco Pte, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 101,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Hargreaves Lansdown, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   17,799,000
Fair Value   $ 0
Investment, Identifier [Axis]: Harp Finco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.31%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 19,516,000  
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.57% [1],[2],[10],[13] 0.19% [3],[4],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[18] $ 11,429,000  
Ending balance $ 98,443,000 [1],[2],[10],[13] $ 11,429,000 [3],[4],[8],[9],[18]
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[17] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[17] $ 11,839,000  
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC - Preferred Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 906,000  
Ending balance 788,000 [1],[2],[13] $ 906,000 [3],[4],[9]
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   1.66%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 100,797,000  
Ending balance [3],[4],[5],[9]   $ 100,797,000
Investment, Identifier [Axis]: Helix TS, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[10],[13],[14] 0.33% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 20,195,000  
Ending balance $ 24,311,000 [1],[2],[10],[13],[14] $ 20,195,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Helix TS, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[10],[13] 0.34% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 20,554,000  
Ending balance $ 20,492,000 [1],[2],[10],[13] $ 20,554,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Helix TS, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[10],[12],[13] 0.06% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 3,719,000  
Ending balance $ 3,700,000 [1],[2],[10],[12],[13] $ 3,719,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Helix TS, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 826,000  
Ending balance 963,000 [1],[2],[10],[12],[13] $ 826,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Helix TS, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 9,715,000 14,165,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[11],[12],[13],[15] 0.08% [3],[4],[7],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[16] $ 4,975,000  
Ending balance 4,950,000 [1],[2],[11],[12],[13],[15] $ 4,975,000 [3],[4],[7],[8],[9],[16]
Investment, Identifier [Axis]: High Street Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   1.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 80,232,000  
Ending balance [3],[4],[5],[6],[9]   $ 80,232,000
Investment, Identifier [Axis]: High Street Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 10,279,000  
Investment, Identifier [Axis]: High Street Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 1.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 70,732,000  
Investment, Identifier [Axis]: High Street Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.21%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 13,065,000  
Investment, Identifier [Axis]: High Street Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,878,000  
Fair Value 0  
Investment, Identifier [Axis]: High Street Buyer, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   1,187,000
Fair Value   0
Investment, Identifier [Axis]: High Street Buyer, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   20,953,000
Fair Value   0
Investment, Identifier [Axis]: High Street Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,254,000 2,254,000
Fair Value $ 0 $ (45,000)
Investment, Identifier [Axis]: Home Service TopCo IV, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.59%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 37,102,000  
Investment, Identifier [Axis]: Home Service TopCo IV, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 2,906,000  
Investment, Identifier [Axis]: Home Service TopCo IV, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,509,000  
Fair Value $ (38,000)  
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[10],[13] 0.24% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 14,643,000  
Ending balance $ 14,866,000 [1],[2],[10],[13] $ 14,643,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[10],[13] 0.11% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 6,671,000  
Ending balance $ 6,773,000 [1],[2],[10],[13] $ 6,671,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[10],[13] 0.09% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 5,439,000  
Ending balance $ 5,522,000 [1],[2],[10],[13] $ 5,439,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 1,066,000  
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 200,000  
Fair Value (1,000)  
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 230,000  
Fair Value 0  
Investment, Identifier [Axis]: IEM New Sub 2, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.95%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 57,825,000  
Ending balance [3],[4],[5],[6],[9]   $ 57,825,000
Investment, Identifier [Axis]: IEM New Sub 2, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.92%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 58,113,000  
Investment, Identifier [Axis]: IEM New Sub 2, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 13,164,000 13,164,000
Fair Value $ (99,000) $ (99,000)
Investment, Identifier [Axis]: IG Investments Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.73% [1],[2],[10],[13],[14] 0.76% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 46,347,000  
Ending balance 46,115,000 [1],[2],[10],[13],[14] $ 46,347,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: IG Investments Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,416,000 4,416,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: INK BC Bidco, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,189,000  
Fair Value 0  
Investment, Identifier [Axis]: INK BC Bidco, Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 14,512,000  
Fair Value 0  
Investment, Identifier [Axis]: INK BC Bidco, Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 3,239,000  
Fair Value 0  
Investment, Identifier [Axis]: IQN Holding Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9] 4,892,000  
Ending balance [3],[4],[8],[9]   $ 4,892,000
Investment, Identifier [Axis]: IQN Holding Corp 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 231,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 231,000
Investment, Identifier [Axis]: IQN Holding Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   359,000
Fair Value   $ 0
Investment, Identifier [Axis]: IQN Holding Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 4,867,000  
Investment, Identifier [Axis]: IQN Holding Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 432,000  
Investment, Identifier [Axis]: IQN Holding Corp. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[30] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[30] $ 600,000  
Investment, Identifier [Axis]: IQN Holding Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 192,000  
Fair Value (1,000)  
Investment, Identifier [Axis]: IQN Holding Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 157,000  
Fair Value 0  
Investment, Identifier [Axis]: IRI Group Holdings Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   3.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 197,500,000  
Ending balance [3],[4],[5],[8],[9]   $ 197,500,000
Investment, Identifier [Axis]: IRI Group Holdings Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 2,760,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 2,760,000
Investment, Identifier [Axis]: IRI Group Holdings Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   11,040,000
Fair Value   $ 0
Investment, Identifier [Axis]: IRI Group Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 3.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 197,497,000  
Investment, Identifier [Axis]: IRI Group Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 14,316,000  
Fair Value $ 0  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 974,000  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 64,000  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 979,000  
Ending balance [3],[4],[5],[8],[9]   $ 979,000
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 34,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 34,000
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 151,000 151,000
Fair Value 0 0
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 54,000 83,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Icefall Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[2],[13],[14],[15] 0.54% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 32,592,000  
Ending balance 32,592,000 [1],[2],[13],[14],[15] $ 32,592,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Icefall Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,104,000 3,104,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Identity Digital, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16],[27]   5.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16],[27] 315,889,000  
Ending balance [3],[4],[9],[16],[27]   $ 315,889,000
Investment, Identifier [Axis]: Imagine 360 LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.28%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 16,957,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 16,957,000
Investment, Identifier [Axis]: Imagine 360 LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,413,000
Fair Value   (12,000)
Investment, Identifier [Axis]: Imagine 360 LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,514,000
Fair Value   $ (15,000)
Investment, Identifier [Axis]: Imagine 360, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.27%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 17,042,000  
Investment, Identifier [Axis]: Imagine 360, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,413,000  
Fair Value (12,000)  
Investment, Identifier [Axis]: Imagine 360, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,514,000  
Fair Value $ (15,000)  
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.73% [1],[2],[10],[13],[14] 0.75% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 45,315,000  
Ending balance 45,680,000 [1],[2],[10],[13],[14] $ 45,315,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,488,000 10,488,000
Fair Value 0 0
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,763,000 797,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Infostretch Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[10],[12],[13] 0.07% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 4,534,000  
Ending balance $ 4,438,000 [1],[2],[10],[12],[13] $ 4,534,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Inovalon Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.90% [1],[2],[10],[13] 0.23% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 14,061,000  
Ending balance $ 182,492,000 [1],[2],[10],[13] $ 14,061,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Inovalon Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 15,144,000  
Investment, Identifier [Axis]: Inovalon Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   1.85%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 112,337,000  
Ending balance [3],[4],[5],[9]   $ 112,337,000
Investment, Identifier [Axis]: Inovalon Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 8,155,000  
Ending balance [3],[4],[5],[9]   $ 8,155,000
Investment, Identifier [Axis]: Integrity Marketing Acquisition LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   2.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 152,532,000  
Ending balance [3],[4],[5],[6],[9]   $ 152,532,000
Investment, Identifier [Axis]: Integrity Marketing Acquisition LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   20,378,000
Fair Value   (43,000)
Investment, Identifier [Axis]: Integrity Marketing Acquisition LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,767,000
Fair Value   $ 0
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 2.56%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 160,739,000  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,426,000  
Fair Value 0  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,767,000  
Fair Value $ 0  
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    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.40% [1],[2],[13],[15] 0.42% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 25,453,000  
Ending balance $ 25,324,000 [1],[2],[13],[15] $ 25,453,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Iris Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[12],[13],[15] 0.04% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 2,282,000  
Ending balance $ 2,388,000 [1],[2],[12],[13],[15] $ 2,282,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Iris Buyer, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 1,102,000  
Investment, Identifier [Axis]: Iris Buyer, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 907,000  
Investment, Identifier [Axis]: Iris Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,594,000 1,426,000
Fair Value 0 0
Investment, Identifier [Axis]: Iris Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,571,000 3,673,000
Fair Value $ 0 $ (101,000)
Investment, Identifier [Axis]: Italian Motorway Holdings S.à r.l    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.48% [1],[2],[11],[12],[13],[17] 1.34% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 81,635,000  
Ending balance 92,834,000 [1],[2],[11],[12],[13],[17] $ 81,635,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: JS Parent Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.59%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 35,560,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 35,560,000
Investment, Identifier [Axis]: JS Parent Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,452,000
Fair Value   $ (17,000)
Investment, Identifier [Axis]: JS Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.56%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 35,381,000  
Investment, Identifier [Axis]: JS Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,452,000  
Fair Value $ 0  
Investment, Identifier [Axis]: JSS Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.55% [1],[2],[10],[13] 4.64% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 281,886,000  
Ending balance $ 286,201,000 [1],[2],[10],[13] $ 281,886,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: JSS Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[10],[12],[13] 0.08% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 4,868,000  
Ending balance $ 4,943,000 [1],[2],[10],[12],[13] $ 4,868,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: JSS Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[2],[10],[13],[14] 0.51% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 30,967,000  
Ending balance 31,436,000 [1],[2],[10],[13],[14] $ 30,967,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: JSS Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,492,000 7,492,000
Fair Value $ (37,000) $ (37,000)
Investment, Identifier [Axis]: Jacuzzi Brands, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[10],[12],[13] 0.17% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 10,469,000  
Ending balance $ 10,413,000 [1],[2],[10],[12],[13] $ 10,469,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Jacuzzi Brands, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.14% [1],[2],[10],[13] 1.19% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 72,027,000  
Ending balance $ 71,638,000 [1],[2],[10],[13] $ 72,027,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Java Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[10],[13] 0.07% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 4,171,000  
Ending balance $ 4,158,000 [1],[2],[10],[13] $ 4,171,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Java Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[10],[12],[13] 0.05% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 2,896,000  
Ending balance $ 2,881,000 [1],[2],[10],[12],[13] $ 2,896,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Java Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[12],[13] 0.04% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 2,731,000  
Ending balance $ 1,624,000 [1],[2],[10],[12],[13] $ 2,731,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Java Buyer, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 2,438,000  
Investment, Identifier [Axis]: Java Buyer, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 147,000  
Investment, Identifier [Axis]: Java Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,524,000 1,347,000
Fair Value 0 0
Investment, Identifier [Axis]: Java Buyer, Inc., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 367,000 367,000
Fair Value 0 0
Investment, Identifier [Axis]: Java Buyer, Inc., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 735,000 735,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Jayhawk Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.92% [1],[2],[13],[15] 0.08% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 4,769,000  
Ending balance $ 120,659,000 [1],[2],[13],[15] $ 4,769,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Jayhawk Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 4,820,000  
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   1.98%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 120,404,000  
Ending balance [3],[4],[9],[16]   $ 120,404,000
Investment, Identifier [Axis]: Jayhawk Holdings, LP - Class A-1 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 79,000  
Ending balance $ 29,000 [1],[2],[13] $ 79,000 [3],[4],[9]
Investment, Identifier [Axis]: Jayhawk Holdings, LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 23,000  
Ending balance $ 16,000 [1],[2],[13] $ 23,000 [3],[4],[9]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 0  
Ending balance $ 0 [1],[2],[13] $ 0 [3],[4],[9]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 208,000  
Ending balance $ 219,000 [1],[2],[13] $ 208,000 [3],[4],[9]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class C Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 220,000  
Ending balance 253,000 [1],[2],[13] $ 220,000 [3],[4],[9]
Investment, Identifier [Axis]: KEN Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[8],[9]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] $ 11,546,000  
Ending balance [3],[4],[5],[7],[8],[9]   $ 11,546,000
Investment, Identifier [Axis]: KEN Bidco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13] 0.20%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13] $ 12,589,000  
Investment, Identifier [Axis]: KKR Alberta Midstream Finance Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[9]   0.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[9] $ 26,870,000  
Ending balance [3],[4],[5],[7],[9]   $ 26,870,000
Investment, Identifier [Axis]: KKR Alberta Midstream Finance, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[13] 0.43%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[13] $ 26,870,000  
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10] 0.27% [1],[2],[13],[24] 0.29% [3],[4],[5],[9],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9],[10],[26] $ 17,408,000  
Ending balance [10] $ 17,069,000 [1],[2],[13],[24] $ 17,408,000 [3],[4],[5],[9],[26]
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10] 0.03% [1],[2],[12],[13],[24] 0.03% [3],[4],[5],[8],[9],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9],[10],[26] $ 2,005,000  
Ending balance [10] 1,966,000 [1],[2],[12],[13],[24] $ 2,005,000 [3],[4],[5],[8],[9],[26]
Investment, Identifier [Axis]: Kattegat Project Bidco AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 2,605,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 2,605,000
Investment, Identifier [Axis]: Kattegat Project Bidco AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 30,803,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 30,803,000
Investment, Identifier [Axis]: Kattegat Project Bidco AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,030,000
Fair Value   $ (84,000)
Investment, Identifier [Axis]: Kattegat Project Bidco, AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 2,605,000  
Investment, Identifier [Axis]: Kattegat Project Bidco, AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.56%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 35,029,000  
Investment, Identifier [Axis]: Kattegat Project Bidco, AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,030,000  
Fair Value $ (96,000)  
Investment, Identifier [Axis]: King Bidco S.P.E.C.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 201,000  
Investment, Identifier [Axis]: King Bidco S.P.E.C., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 88,000  
Fair Value (1,000)  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 7,559,000  
Ending balance [3],[4],[5],[6],[9]   $ 7,559,000
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 8,385,000  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 102,000  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,031,000 906,000
Fair Value 0 0
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   950,000
Fair Value   $ 0
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,032,000  
Fair Value 0  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 406,000  
Fair Value $ (4,000)  
Investment, Identifier [Axis]: Kona Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13],[14] 0.00% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 58,000  
Ending balance $ 76,000 [1],[2],[10],[12],[13],[14] $ 58,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Kona Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.02% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,039,000  
Ending balance 1,034,000 [1],[2],[10],[12],[13] $ 1,039,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Kona Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 290,000  
Fair Value 0  
Investment, Identifier [Axis]: Kona Buyer, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   246,000
Fair Value   0
Investment, Identifier [Axis]: Kona Buyer, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   307,000
Fair Value   (2,000)
Investment, Identifier [Axis]: Kona Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 123,000 123,000
Fair Value $ (1,000) $ (1,000)
Investment, Identifier [Axis]: Kwol Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[10],[13],[14] 0.11% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 6,535,000  
Ending balance 6,521,000 [1],[2],[10],[13],[14] $ 6,535,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Kwol Acquisition, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 897,000 897,000
Fair Value $ 0 $ (2,000)
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 14,832,000  
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.23%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 13,864,000  
Ending balance [3],[4],[5],[8],[9]   $ 13,864,000
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,226,000  
Ending balance [3],[4],[5],[8],[9]   $ 1,226,000
Investment, Identifier [Axis]: LD Lower Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.28% [1],[2],[13],[15] 1.38% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 83,671,000  
Ending balance $ 80,453,000 [1],[2],[13],[15] $ 83,671,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: LPW Group Holdings, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.42%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 26,594,000  
Investment, Identifier [Axis]: LPW Group Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   0.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] 26,728,000  
Ending balance [3],[4],[6],[9],[16]   $ 26,728,000
Investment, Identifier [Axis]: LPW Group Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,373,000 5,373,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Legacy Intermediate, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[10],[12],[13] 0.11% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 6,697,000  
Ending balance $ 6,663,000 [1],[2],[10],[12],[13] $ 6,697,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Legacy Intermediate, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.02% [3],[4],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[28] $ 1,290,000  
Ending balance 1,287,000 [1],[2],[10],[12],[13] $ 1,290,000 [3],[4],[8],[9],[28]
Investment, Identifier [Axis]: Lightbox Intermediate, LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[18]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[18] $ 1,867,000  
Ending balance [3],[4],[8],[9],[18]   $ 1,867,000
Investment, Identifier [Axis]: Lindstrom, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.88% [1],[2],[13],[15] 1.96% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 118,943,000  
Ending balance 118,442,000 [1],[2],[13],[15] $ 118,943,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Livingston International, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[9]   2.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[9] $ 122,571,000  
Ending balance [3],[4],[5],[7],[9]   $ 122,571,000
Investment, Identifier [Axis]: Lobos Parent, Inc. - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[13] 0.03% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 2,000,000  
Ending balance 2,155,000 [1],[2],[13] $ 2,000,000 [3],[4],[9]
Investment, Identifier [Axis]: LogicMonitor Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.26%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 15,712,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 15,712,000
Investment, Identifier [Axis]: LogicMonitor Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,992,000
Fair Value   (25,000)
Investment, Identifier [Axis]: LogicMonitor, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.25%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 15,712,000  
Investment, Identifier [Axis]: LogicMonitor, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,992,000  
Fair Value (25,000)  
Investment, Identifier [Axis]: Lsf12 Crown US Commercial Bidco LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   4,345,000
Fair Value   $ (36,000)
Investment, Identifier [Axis]: Lsf12 Crown US Commercial Bidco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,345,000  
Fair Value $ (8,000)  
Investment, Identifier [Axis]: Lytx, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.34% [1],[2],[13],[15] 1.39% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 84,454,000  
Ending balance $ 84,454,000 [1],[2],[13],[15] $ 84,454,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: MAG DS Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.22% [1],[2],[15] 1.23% [3],[4],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[16] $ 74,788,000  
Ending balance $ 76,551,000 [1],[2],[15] $ 74,788,000 [3],[4],[16]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.37% [1],[2],[10],[13] 0.38% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 23,162,000  
Ending balance $ 23,045,000 [1],[2],[10],[13] $ 23,162,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[10],[12],[13],[14] 0.03% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,667,000  
Ending balance $ 2,931,000 [1],[2],[10],[12],[13],[14] $ 1,667,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[10],[12],[13] 0.06% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 3,381,000  
Ending balance 3,408,000 [1],[2],[10],[12],[13] $ 3,381,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,315,000 6,570,000
Fair Value 0 0
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,382,000 1,382,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[12],[13],[14],[15] 0.03% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 1,908,000  
Ending balance $ 1,941,000 [1],[2],[12],[13],[14],[15] $ 1,908,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[12],[13],[15] 0.00% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 76,000  
Ending balance $ 75,000 [1],[2],[12],[13],[15] $ 76,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[12],[13],[15] 0.00% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 76,000  
Ending balance 75,000 [1],[2],[12],[13],[15] $ 76,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 161,000 214,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MPG Parent Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[13],[15] 0.18% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 10,872,000  
Ending balance $ 10,817,000 [1],[2],[13],[15] $ 10,872,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: MPG Parent Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[12],[13],[14],[15] 0.04% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 2,646,000  
Ending balance 2,633,000 [1],[2],[12],[13],[14],[15] $ 2,646,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: MPG Parent Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,087,000 3,087,000
Fair Value (23,000) (23,000)
Investment, Identifier [Axis]: MPG Parent Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,339,000 1,339,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MRH Trowe Beteiligungsgesellschaft mbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[14],[17] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[14],[17] $ 410,000  
Investment, Identifier [Axis]: MRH Trowe Beteiligungsgesellschaft mbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 131,000  
Fair Value 0  
Investment, Identifier [Axis]: MRH Trowe Beteiligungsgesellschaft mbH, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 35,000  
Fair Value $ 0  
Investment, Identifier [Axis]: MRI Software, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[15] 0.11% [3],[4],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[16] $ 6,742,000  
Ending balance $ 6,665,000 [1],[2],[15] $ 6,742,000 [3],[4],[16]
Investment, Identifier [Axis]: MRI Software, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.43% [1],[2],[15] 0.84% [3],[4],[6],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 50,879,000  
Ending balance $ 89,864,000 [1],[2],[15] $ 50,879,000 [3],[4],[6],[9],[16]
Investment, Identifier [Axis]: MRI Software, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[12],[13],[14],[15] 0.66% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 40,020,000  
Ending balance 207,000 [1],[2],[12],[13],[14],[15] $ 40,020,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: MRI Software, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,953,000 6,953,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Magic Bidco Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 19,808,000  
Ending balance [3],[4],[5],[9]   $ 19,808,000
Investment, Identifier [Axis]: Magic Bidco Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 2,570,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 2,570,000
Investment, Identifier [Axis]: Magic Bidco Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 740,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 740,000
Investment, Identifier [Axis]: Magic Bidco Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,098,000
Fair Value   0
Investment, Identifier [Axis]: Magic Bidco Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,088,000
Fair Value   $ 0
Investment, Identifier [Axis]: Magic Bidco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.41%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 25,551,000  
Investment, Identifier [Axis]: Magic Bidco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 2,722,000  
Investment, Identifier [Axis]: Magic Bidco, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 721,000  
Investment, Identifier [Axis]: Magic Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,098,000  
Fair Value 0  
Investment, Identifier [Axis]: Magic Bidco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 955,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[10],[13] 0.09% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 5,628,000  
Ending balance $ 5,599,000 [1],[2],[10],[13] $ 5,628,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13] 0.00% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 140,000  
Ending balance $ 139,000 [1],[2],[10],[12],[13] $ 140,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[10],[12],[13] 0.07% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 4,224,000  
Ending balance $ 4,608,000 [1],[2],[10],[12],[13] $ 4,224,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[2],[10],[13],[14] 0.54% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 32,631,000  
Ending balance 32,972,000 [1],[2],[10],[13],[14] $ 32,631,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   6,610,000
Fair Value   (83,000)
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,508,000 5,508,000
Fair Value $ (110,000) $ (110,000)
Investment, Identifier [Axis]: Mandolin Technology Holdings, Inc. - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[13] 0.06% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 3,781,000  
Ending balance 3,926,000 [1],[2],[13] $ 3,781,000 [3],[4],[9]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[28]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[28] $ 3,035,000  
Ending balance [3],[4],[8],[9],[28]   $ 3,035,000
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[19] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[19] $ 3,066,000  
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[12],[13],[19] 0.12% [3],[4],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[28] $ 7,300,000  
Ending balance $ 7,346,000 [1],[2],[12],[13],[19] $ 7,300,000 [3],[4],[8],[9],[28]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[12],[13],[19] 0.11% [3],[4],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[28] $ 6,619,000  
Ending balance $ 6,448,000 [1],[2],[12],[13],[19] $ 6,619,000 [3],[4],[8],[9],[28]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[12],[13],[14],[17] 0.02% [3],[4],[8],[9],[18],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[18],[28] $ 1,038,000  
Ending balance 154,000 [1],[2],[12],[13],[14],[17] $ 1,038,000 [3],[4],[8],[9],[18],[28]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,004,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[10],[12],[13] 0.07% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 4,352,000  
Ending balance $ 4,424,000 [1],[2],[10],[12],[13] $ 4,352,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.02% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,399,000  
Ending balance $ 1,422,000 [1],[2],[10],[12],[13] $ 1,399,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.02% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,401,000  
Ending balance $ 1,424,000 [1],[2],[10],[12],[13] $ 1,401,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Material Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[10],[12],[13],[14],[21] 0.35% [3],[4],[5],[6],[8],[9],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9],[22] $ 21,547,000  
Ending balance $ 22,380,000 [1],[2],[10],[12],[13],[14],[21] $ 21,547,000 [3],[4],[5],[6],[8],[9],[22]
Investment, Identifier [Axis]: Material Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13],[21],[23] 0.02% [3],[4],[5],[8],[9],[22],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9],[22],[25] $ 1,397,000  
Ending balance 393,000 [1],[2],[10],[12],[13],[21],[23] $ 1,397,000 [3],[4],[5],[8],[9],[22],[25]
Investment, Identifier [Axis]: Material Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,999,000  
Fair Value 0  
Investment, Identifier [Axis]: Material Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 353,000 353,000
Fair Value $ (42,000) $ (42,000)
Investment, Identifier [Axis]: Material+ Holding Company, LLC - Class C Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13],[21] 0.00% [3],[4],[9],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[22] $ 0  
Ending balance 0 [1],[2],[13],[21] $ 0 [3],[4],[9],[22]
Investment, Identifier [Axis]: Maverick Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16],[25]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16],[25] $ 12,273,000  
Ending balance [3],[4],[9],[16],[25]   $ 12,273,000
Investment, Identifier [Axis]: Maverick Acquisition, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15],[23] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15],[23] $ 10,151,000  
Investment, Identifier [Axis]: Maverick Acquisition, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 276,000  
Investment, Identifier [Axis]: Maverick Acquisition, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 96,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Medallia, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.34% [1],[2],[10],[13] 5.87% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 356,442,000  
Ending balance $ 335,599,000 [1],[2],[10],[13] $ 356,442,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Medallia, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[12],[13] 0.03% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 2,092,000  
Ending balance 1,969,000 [1],[2],[10],[12],[13] $ 2,092,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Mercury Bidco Globe Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.98%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 59,401,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 59,401,000
Investment, Identifier [Axis]: Mercury Bidco Globe Limited, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   14,933,000
Fair Value   $ (168,000)
Investment, Identifier [Axis]: Mercury Bidco Globe, Limited 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 1.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 68,254,000  
Investment, Identifier [Axis]: Mercury Bidco Globe, Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[19] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[19] $ 4,520,000  
Investment, Identifier [Axis]: Mercury Bidco Globe, Limited, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,003,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Micross Topco, Inc. - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[13] 0.12% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 7,426,000  
Ending balance $ 6,541,000 [1],[2],[13] $ 7,426,000 [3],[4],[9]
Investment, Identifier [Axis]: Mimecast Limited - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 721,000  
Ending balance 735,000 [1],[2],[13] $ 721,000 [3],[4],[9]
Investment, Identifier [Axis]: Minerva Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,556,000  
Fair Value 0  
Investment, Identifier [Axis]: Mode Holdings, L.P. - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 4,774,000  
Ending balance [3],[4],[9]   $ 4,774,000
Investment, Identifier [Axis]: Mode Holdings, LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 3,841,000  
Investment, Identifier [Axis]: Mode Purchaser, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.13% [1],[2],[13],[15] 2.22% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 135,164,000  
Ending balance $ 134,024,000 [1],[2],[13],[15] $ 135,164,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Mode Purchaser, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[13],[15] 0.06% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 3,858,000  
Ending balance $ 3,826,000 [1],[2],[13],[15] $ 3,858,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Modernizing Medicine, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 8,771,000  
Investment, Identifier [Axis]: Modernizing Medicine, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 827,000  
Fair Value (8,000)  
Investment, Identifier [Axis]: Monk Holding Co. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[26]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[26] 4,755,000  
Ending balance [3],[4],[9],[26]   $ 4,755,000
Investment, Identifier [Axis]: Monk Holding Co. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 288,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 288,000
Investment, Identifier [Axis]: Monk Holding Co., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   917,000
Fair Value   $ 0
Investment, Identifier [Axis]: Monk Holding, Co. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[24] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[24] $ 4,730,000  
Investment, Identifier [Axis]: Monk Holding, Co. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 985,000  
Investment, Identifier [Axis]: Monk Holding, Co., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 217,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[11],[12],[13],[17] 0.00% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 189,000  
Ending balance $ 221,000 [1],[2],[11],[12],[13],[17] $ 189,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[11],[12],[13],[17] 0.02% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 987,000  
Ending balance $ 1,122,000 [1],[2],[11],[12],[13],[17] $ 987,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[11],[12],[13],[17] 0.01% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 669,000  
Ending balance $ 761,000 [1],[2],[11],[12],[13],[17] $ 669,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[11],[12],[13],[19] 0.01% [3],[4],[7],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[28] $ 452,000  
Ending balance $ 511,000 [1],[2],[11],[12],[13],[19] $ 452,000 [3],[4],[7],[8],[9],[28]
Investment, Identifier [Axis]: More Cowbell II, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[10],[13] 0.13% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 7,917,000  
Ending balance $ 7,877,000 [1],[2],[10],[13] $ 7,917,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: More Cowbell II, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13],[14] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 442,000  
Ending balance 216,000 [1],[2],[10],[12],[13],[14] $ 442,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: More Cowbell II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 916,000 916,000
Fair Value (11,000) (11,000)
Investment, Identifier [Axis]: More Cowbell II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 906,000 679,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: NAVEX TopCo, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.96% [1],[2],[10],[13],[14] 1.00% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 60,843,000  
Ending balance 60,537,000 [1],[2],[10],[13],[14] $ 60,843,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: NAVEX TopCo, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,394,000 5,394,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: NC Ocala Co-Invest Beta, L.P. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 3,368,000  
Ending balance [3],[4],[9]   $ 3,368,000
Investment, Identifier [Axis]: NC Ocala Co-Invest Beta, LP - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 3,311,000  
Investment, Identifier [Axis]: NDC Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[2],[13],[14],[15] 0.22% [3],[4],[6],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[18] $ 13,285,000  
Ending balance 13,558,000 [1],[2],[13],[14],[15] $ 13,285,000 [3],[4],[6],[9],[18]
Investment, Identifier [Axis]: NDC Acquisition Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,083,000 3,425,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: NDT Global Holding, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[19] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[19] $ 769,000  
Investment, Identifier [Axis]: NDT Global Holding, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 347,000  
Fair Value (2,000)  
Investment, Identifier [Axis]: NDT Global Holding, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 173,000  
Fair Value (2,000)  
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   1.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 71,173,000  
Ending balance [3],[4],[5],[9]   $ 71,173,000
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.24%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 14,758,000  
Ending balance [3],[4],[5],[9]   $ 14,758,000
Investment, Identifier [Axis]: NSI Parent, LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 579,000  
Investment, Identifier [Axis]: Navigator Acquiror, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.68% [1],[2],[13],[14],[19] 3.54% [3],[4],[6],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[28] $ 214,831,000  
Ending balance 231,097,000 [1],[2],[13],[14],[19] $ 214,831,000 [3],[4],[6],[9],[28]
Investment, Identifier [Axis]: Navigator Acquiror, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   8,249,000
Fair Value   $ 0
Investment, Identifier [Axis]: Navigator Acquiror, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 7,762,000  
Fair Value (58,000)  
Investment, Identifier [Axis]: Navigator Acquiror, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 7,762,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Ncp Helix Holdings, LLC - Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 395,000  
Investment, Identifier [Axis]: Ncp Helix Holdings, LLC. - Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 537,000  
Ending balance [3],[4],[9]   $ 537,000
Investment, Identifier [Axis]: Nephele III, BV    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 310,000  
Investment, Identifier [Axis]: Nephele III, BV, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 28,000  
Fair Value 0  
Investment, Identifier [Axis]: Neptune BidCo SAS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 6,525,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 6,525,000
Investment, Identifier [Axis]: Neptune BidCo SAS, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,051,000
Fair Value   $ 0
Investment, Identifier [Axis]: Neptune BidCo, SAS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 8,439,000  
Investment, Identifier [Axis]: Neptune BidCo, SAS, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,401,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Neptune Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[10],[13],[14] 0.11% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 6,924,000  
Ending balance 6,872,000 [1],[2],[10],[13],[14] $ 6,924,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Neptune Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 933,000 933,000
Fair Value 0 $ (23,000)
Investment, Identifier [Axis]: Netsmart Technologies Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 32,611,000  
Ending balance [3],[4],[5],[6],[9]   $ 32,611,000
Investment, Identifier [Axis]: Netsmart Technologies Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,345,000
Fair Value   (22,000)
Investment, Identifier [Axis]: Netsmart Technologies Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   4,432,000
Fair Value   $ (22,000)
Investment, Identifier [Axis]: Netsmart Technologies, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.53%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 33,218,000  
Investment, Identifier [Axis]: Netsmart Technologies, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,345,000  
Fair Value (22,000)  
Investment, Identifier [Axis]: Netsmart Technologies, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,432,000  
Fair Value 0  
Investment, Identifier [Axis]: Nintex Topco Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[9],[18]   0.52%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[18] $ 31,654,000  
Ending balance [3],[4],[7],[9],[18]   $ 31,654,000
Investment, Identifier [Axis]: Nintex Topco, Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[17] 0.49%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[17] $ 30,953,000  
Investment, Identifier [Axis]: Noble Midco 3 Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9]   0.28%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 16,772,000  
Ending balance [3],[4],[5],[6],[7],[8],[9]   $ 16,772,000
Investment, Identifier [Axis]: Noble Midco 3 Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,875,000
Fair Value   (19,000)
Investment, Identifier [Axis]: Noble Midco 3 Ltd, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,583,000
Fair Value   0
Investment, Identifier [Axis]: Noble Midco 3, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13],[14] 0.27%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13],[14] $ 16,966,000  
Investment, Identifier [Axis]: Noble Midco 3, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,875,000  
Fair Value (19,000)  
Investment, Identifier [Axis]: Noble Midco 3, Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,390,000  
Fair Value 0  
Investment, Identifier [Axis]: North Haven Stallone Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   511,000
Fair Value   (1,000)
Investment, Identifier [Axis]: North Haven Stallone Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   913,000
Fair Value   $ (2,000)
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] 1,432,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 1,432,000
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 2,183,000  
Ending balance [3],[4],[8],[9],[16]   $ 2,183,000
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 1,278,000  
Ending balance [3],[4],[8],[9],[16]   $ 1,278,000
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 544,000  
Ending balance [3],[4],[8],[9],[16]   $ 544,000
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] 751,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 751,000
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 632,000  
Ending balance [3],[4],[8],[9],[16]   $ 632,000
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 7    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 3,893,000  
Ending balance [3],[4],[8],[9],[16]   $ 3,893,000
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,544,000
Fair Value   0
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,548,000
Fair Value   $ 0
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 2,133,000  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 2,149,000  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 1,258,000  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 535,000  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 685,000  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 623,000  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc. 7    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[15] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[15] $ 3,834,000  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,544,000  
Fair Value 0  
Investment, Identifier [Axis]: North Haven Ushc Acquisition, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 817,000  
Fair Value $ 0  
Investment, Identifier [Axis]: OHCP V TC COI, LP - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 8,645,000  
Investment, Identifier [Axis]: OHCP V TC COI, LP. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 8,085,000  
Ending balance [3],[4],[9]   $ 8,085,000
Investment, Identifier [Axis]: Octane Purchaser, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[19] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[19] $ 2,318,000  
Investment, Identifier [Axis]: Octane Purchaser, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,227,000  
Fair Value 0  
Investment, Identifier [Axis]: Octane Purchaser, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 491,000  
Fair Value (2,000)  
Investment, Identifier [Axis]: Odevo AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] 258,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 258,000
Investment, Identifier [Axis]: Odevo AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 2,759,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 2,759,000
Investment, Identifier [Axis]: Odevo AB 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 8,180,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 8,180,000
Investment, Identifier [Axis]: Odevo AB 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.46%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 28,018,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 28,018,000
Investment, Identifier [Axis]: Odevo AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   32,508,000
Fair Value   $ (80,000)
Investment, Identifier [Axis]: Odevo, AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 295,000  
Investment, Identifier [Axis]: Odevo, AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 3,040,000  
Investment, Identifier [Axis]: Odevo, AB 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 9,614,000  
Investment, Identifier [Axis]: Odevo, AB 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.45%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 28,239,000  
Investment, Identifier [Axis]: Odevo, AB 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 631,000  
Investment, Identifier [Axis]: Odevo, AB 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 1,694,000  
Investment, Identifier [Axis]: Odevo, AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 30,152,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[10],[13],[24] 0.18% [3],[4],[9],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16],[26] $ 10,804,000  
Ending balance $ 10,804,000 [1],[2],[10],[13],[24] $ 10,804,000 [3],[4],[9],[16],[26]
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[13],[14],[15],[24] 0.24% [3],[4],[6],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[16],[26] $ 14,746,000  
Ending balance 14,667,000 [1],[2],[13],[14],[15],[24] $ 14,746,000 [3],[4],[6],[16],[26]
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,472,000 4,472,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Optimizely North America Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 1,072,000  
Ending balance [3],[4],[5],[8],[9]   $ 1,072,000
Investment, Identifier [Axis]: Optimizely North America Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 2,956,000  
Ending balance [3],[4],[5],[8],[9]   $ 2,956,000
Investment, Identifier [Axis]: Optimizely North America Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 8,120,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 8,120,000
Investment, Identifier [Axis]: Optimizely North America Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,218,000
Fair Value   $ (12,000)
Investment, Identifier [Axis]: Optimizely North America, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 1,169,000  
Investment, Identifier [Axis]: Optimizely North America, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 3,344,000  
Investment, Identifier [Axis]: Optimizely North America, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 8,079,000  
Investment, Identifier [Axis]: Optimizely North America, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,218,000  
Fair Value (12,000)  
Investment, Identifier [Axis]: Oranje Holdco Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] 2,000,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 2,000,000
Investment, Identifier [Axis]: Oranje Holdco Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.56%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 33,969,000  
Ending balance [3],[4],[9]   $ 33,969,000
Investment, Identifier [Axis]: Oranje Holdco Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   250,000
Fair Value   $ 0
Investment, Identifier [Axis]: Oranje Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 2,000,000  
Investment, Identifier [Axis]: Oranje Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.54%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 33,969,000  
Investment, Identifier [Axis]: Oranje Holdco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 250,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Other Cash and Cash Equivalents    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.02% [1],[2] 3.25% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 197,359,000  
Ending balance 252,797,000 [1],[2] $ 197,359,000 [3],[4]
Investment, Identifier [Axis]: Oxford Global Resources Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   0.31%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] 18,774,000  
Ending balance [3],[4],[6],[9],[16]   $ 18,774,000
Investment, Identifier [Axis]: Oxford Global Resources Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 2,909,000  
Ending balance [3],[4],[9],[16]   $ 2,909,000
Investment, Identifier [Axis]: Oxford Global Resources Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[28]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[28] $ 2,217,000  
Ending balance [3],[4],[9],[28]   $ 2,217,000
Investment, Identifier [Axis]: Oxford Global Resources Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,085,000
Fair Value   $ 0
Investment, Identifier [Axis]: Oxford Global Resources, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.30%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 18,677,000  
Investment, Identifier [Axis]: Oxford Global Resources, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 2,894,000  
Investment, Identifier [Axis]: Oxford Global Resources, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[19] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[19] $ 2,205,000  
Investment, Identifier [Axis]: Oxford Global Resources, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,085,000  
Fair Value 0  
Investment, Identifier [Axis]: PDI TA Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.69%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 41,760,000  
Ending balance [3],[4],[5],[6],[9]   $ 41,760,000
Investment, Identifier [Axis]: PDI TA Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.70%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 43,735,000  
Investment, Identifier [Axis]: PDI TA Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 5,355,000  
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,835,000
Fair Value   0
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,280,000 3,800,000
Fair Value $ 0 $ (29,000)
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13],[14] 0.02% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,034,000  
Ending balance 1,037,000 [1],[2],[10],[12],[13],[14] $ 1,034,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 504,000 504,000
Fair Value (3,000) 0
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 141,000 141,000
Fair Value $ (1,000) $ (1,000)
Investment, Identifier [Axis]: PPT Holdings III, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[12],[13],[17] 0.03% [3],[4],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[18] $ 1,767,000  
Ending balance $ 1,882,000 [1],[2],[12],[13],[17] $ 1,767,000 [3],[4],[8],[9],[18]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[10],[13] 0.03% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,977,000  
Ending balance $ 1,967,000 [1],[2],[10],[13] $ 1,977,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13],[14] 0.00% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 76,000  
Ending balance 198,000 [1],[2],[10],[12],[13],[14] $ 76,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 187,000 309,000
Fair Value 0 (2,000)
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 159,000 159,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: PT Intermediate Holdings III, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.98% [1],[2],[10],[13],[14] 1.01% [3],[4],[6],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[28] $ 61,437,000  
Ending balance 61,669,000 [1],[2],[10],[13],[14] $ 61,437,000 [3],[4],[6],[9],[28]
Investment, Identifier [Axis]: PT Intermediate Holdings III, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,338,000 4,338,000
Fair Value 0 $ (5,000)
Investment, Identifier [Axis]: Paisley Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] 6,438,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 6,438,000
Investment, Identifier [Axis]: Paisley Bidco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 3,507,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 3,507,000
Investment, Identifier [Axis]: Paisley Bidco Ltd 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 3,093,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 3,093,000
Investment, Identifier [Axis]: Paisley Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,563,000
Fair Value   $ (12,000)
Investment, Identifier [Axis]: Paisley Bidco, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 8,853,000  
Investment, Identifier [Axis]: Paisley Bidco, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 4,028,000  
Investment, Identifier [Axis]: Paisley Bidco, Ltd. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 3,553,000  
Investment, Identifier [Axis]: Paramount Global Surfaces, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.68%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 43,011,000  
Investment, Identifier [Axis]: Park Place Technologies, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.79% [1],[2],[10],[13] 1.86% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 112,936,000  
Ending balance $ 112,650,000 [1],[2],[10],[13] $ 112,936,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Park Place Technologies, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[10],[12],[13],[14] 0.06% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 3,698,000  
Ending balance $ 3,909,000 [1],[2],[10],[12],[13],[14] $ 3,698,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Park Place Technologies, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 9,220,000  
Investment, Identifier [Axis]: Park Place Technologies, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,502,000 17,767,000
Fair Value 0 (89,000)
Investment, Identifier [Axis]: Park Place Technologies, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 9,417,000 9,505,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 4,521,000  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 3,554,000  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 679,000  
Fair Value 0  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 469,000  
Fair Value (9,000)  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 4,544,000  
Ending balance [3],[4],[5],[8],[9]   $ 4,544,000
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 2,979,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 2,979,000
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8] $ 225,000  
Ending balance [3],[4],[5],[6],[8]   $ 225,000
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,275,000
Fair Value   0
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   235,000
Fair Value   $ 0
Investment, Identifier [Axis]: Pavion Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.17% [1],[2],[10],[11],[13] 1.26% [3],[4],[5],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[9] $ 76,409,000  
Ending balance $ 73,426,000 [1],[2],[10],[11],[13] $ 76,409,000 [3],[4],[5],[7],[9]
Investment, Identifier [Axis]: Pavion Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[10],[11],[13],[14] 0.26% [3],[4],[5],[6],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[9] $ 15,497,000  
Ending balance 15,511,000 [1],[2],[10],[11],[13],[14] $ 15,497,000 [3],[4],[5],[6],[7],[9]
Investment, Identifier [Axis]: Pavion Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,559,000 2,559,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Petrus Buyer Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[10],[12]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[10],[12] 1,871,000  
Ending balance [3],[4],[9],[10],[12]   $ 1,871,000
Investment, Identifier [Axis]: Petrus Buyer Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 335,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 335,000
Investment, Identifier [Axis]: Petrus Buyer Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   260,000
Fair Value   0
Investment, Identifier [Axis]: Petrus Buyer Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   272,000
Fair Value   $ 0
Investment, Identifier [Axis]: Petrus Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 1,862,000  
Investment, Identifier [Axis]: Petrus Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 333,000  
Investment, Identifier [Axis]: Petrus Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 645,000  
Investment, Identifier [Axis]: Petrus Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 260,000  
Fair Value 0  
Investment, Identifier [Axis]: Petrus Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 272,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Phoenix 1 Buyer Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[10],[13],[14] 0.42% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 25,753,000  
Ending balance 25,559,000 [1],[2],[10],[13],[14] $ 25,753,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Phoenix 1 Buyer Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,009,000 5,009,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Ping Identity Holding Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 6,691,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 6,691,000
Investment, Identifier [Axis]: Ping Identity Holding Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   671,000
Fair Value   $ 0
Investment, Identifier [Axis]: Ping Identity Holding Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 6,657,000  
Investment, Identifier [Axis]: Ping Identity Holding Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 671,000  
Fair Value 0  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   2.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 123,684,000  
Ending balance [3],[4],[6],[9],[16]   $ 123,684,000
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 1.99%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 125,381,000  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 36,397,000 36,397,000
Fair Value $ 0 $ (455,000)
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[13] 0.11% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 6,483,000  
Ending balance $ 7,211,000 [1],[2],[13] $ 6,483,000 [3],[4],[9]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[13] 0.02% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 1,393,000  
Ending balance $ 1,550,000 [1],[2],[13] $ 1,393,000 [3],[4],[9]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.09% [3],[4],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9] $ 5,287,000  
Ending balance 287,000 [1],[2],[13] $ 5,287,000 [3],[4],[7],[9]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional B Common Units 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 243,000  
Ending balance [3],[4],[9]   $ 243,000
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[13] 0.02% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 1,130,000  
Ending balance 1,337,000 [1],[2],[13] $ 1,130,000 [3],[4],[9]
Investment, Identifier [Axis]: Porcelain Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.83%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 50,531,000  
Ending balance [3],[4],[9],[16]   $ 50,531,000
Investment, Identifier [Axis]: Profile Products, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[10],[13] 0.12% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 7,001,000  
Ending balance $ 7,055,000 [1],[2],[10],[13] $ 7,001,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Profile Products, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13],[14] 0.00% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 88,000  
Ending balance 292,000 [1],[2],[10],[12],[13],[14] $ 88,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Profile Products, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 9,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 9,000
Investment, Identifier [Axis]: Profile Products, LLC, Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 373,000 353,000
Fair Value (7,000) 0
Investment, Identifier [Axis]: Profile Products, LLC, Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 213,000 417,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.08% [1],[2],[10],[13] 1.12% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 67,900,000  
Ending balance $ 67,900,000 [1],[2],[10],[13] $ 67,900,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13],[14] 0.01% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 833,000  
Ending balance 833,000 [1],[2],[10],[12],[13],[14] $ 833,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 16,623,000 16,623,000
Fair Value 0 0
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 333,000 333,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 995,000  
Ending balance [3],[4],[5],[8],[9]   $ 995,000
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[18]   0.14%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[18] $ 8,360,000  
Ending balance [3],[4],[18]   $ 8,360,000
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[17] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[17] $ 8,288,000  
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 998,000  
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10] 0.07% [1],[2],[13] 0.07% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9],[10] $ 4,461,000  
Ending balance [10] $ 4,461,000 [1],[2],[13] $ 4,461,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10] 0.22% [1],[2],[12],[13] 0.23% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9],[10] $ 13,747,000  
Ending balance [10] 13,816,000 [1],[2],[12],[13] $ 13,747,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: QBS Parent Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.15%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 9,267,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 9,267,000
Investment, Identifier [Axis]: QBS Parent Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   984,000
Fair Value   $ (5,000)
Investment, Identifier [Axis]: QBS Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.21%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 13,402,000  
Investment, Identifier [Axis]: QBS Parent, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,472,000  
Fair Value 0  
Investment, Identifier [Axis]: QBS Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,908,000  
Fair Value $ (10,000)  
Investment, Identifier [Axis]: Qualus Power Services Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.52%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 32,591,000  
Investment, Identifier [Axis]: Qualus Power Services Corp 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.56%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 35,256,000  
Investment, Identifier [Axis]: Qualus Power Services Corp 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 1.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 70,579,000  
Investment, Identifier [Axis]: Qualus Power Services Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 32,778,000  
Ending balance [3],[4],[9],[16]   $ 32,778,000
Investment, Identifier [Axis]: Qualus Power Services Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   0.58%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] 35,439,000  
Ending balance [3],[4],[9],[16]   $ 35,439,000
Investment, Identifier [Axis]: Qualus Power Services Corp. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16]   1.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] 70,813,000  
Ending balance [3],[4],[6],[9],[16]   $ 70,813,000
Investment, Identifier [Axis]: Qualus Power Services Corp., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 12,093,000 12,093,000
Fair Value 0 0
Investment, Identifier [Axis]: Qualus Power Services Corp., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 33,748,000 33,748,000
Fair Value $ (169,000) $ (169,000)
Investment, Identifier [Axis]: R1 Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 1,278,000  
Investment, Identifier [Axis]: R1 Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 31,000  
Fair Value $ 0  
Investment, Identifier [Axis]: RC VI Buckeye Holdings, LLC - LLC Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 161,000  
Investment, Identifier [Axis]: RFS Opco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[13],[14],[19] 0.16% [3],[4],[6],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[28] $ 9,491,000  
Ending balance 11,823,000 [1],[2],[13],[14],[19] $ 9,491,000 [3],[4],[6],[8],[9],[28]
Investment, Identifier [Axis]: RFS Opco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,881,000 2,381,000
Fair Value $ (5,000) $ 0
Investment, Identifier [Axis]: RWL Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.42% [1],[2],[10],[13] 0.44% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 26,714,000  
Ending balance $ 26,577,000 [1],[2],[10],[13] $ 26,714,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: RailPros Parent, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 397,000  
Investment, Identifier [Axis]: RailPros Parent, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 124,000  
Fair Value (1,000)  
Investment, Identifier [Axis]: RailPros Parent, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 62,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Rally Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13] 0.01% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 820,000  
Ending balance $ 816,000 [1],[2],[10],[12],[13] $ 820,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Rally Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13] 0.00% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 77,000  
Ending balance $ 101,000 [1],[2],[10],[12],[13] $ 77,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Rally Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   25,000
Fair Value   $ 0
Investment, Identifier [Axis]: Razor Holdco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[2],[10],[13] 0.60% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 36,593,000  
Ending balance 18,885,000 [1],[2],[10],[13] $ 36,593,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9],[16]   1.28%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 78,073,000  
Ending balance [3],[4],[9],[16]   $ 78,073,000
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 1.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 73,640,000  
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 5,984,000  
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 21,879,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Red Griffin ParentCo, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[13] 0.05% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 3,166,000  
Ending balance $ 2,844,000 [1],[2],[13] $ 3,166,000 [3],[4],[9]
Investment, Identifier [Axis]: Red River Technology, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.12% [1],[2],[13],[15] 1.24% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 75,588,000  
Ending balance $ 70,276,000 [1],[2],[13],[15] $ 75,588,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Redwood Services Group, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.22% [1],[2],[10],[13] 0.08% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 4,641,000  
Ending balance $ 76,766,000 [1],[2],[10],[13] $ 4,641,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Redwood Services Group, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.32% [1],[2],[10],[13],[14] 1.22% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 73,918,000  
Ending balance 82,844,000 [1],[2],[10],[13],[14] $ 73,918,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,980,000
Fair Value   $ 0
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 3,929,000  
Fair Value 0  
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 16,680,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Relativity ODA, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[2],[13],[14],[15] 0.32% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 19,251,000  
Ending balance 19,171,000 [1],[2],[13],[14],[15] $ 19,251,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Relativity ODA, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,966,000 2,966,000
Fair Value (74,000) $ (74,000)
Investment, Identifier [Axis]: RoadOne Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 1,109,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 1,109,000
Investment, Identifier [Axis]: RoadOne Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   226,000
Fair Value   $ 0
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[2],[13],[15] 0.53% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 32,093,000  
Ending balance $ 31,429,000 [1],[2],[13],[15] $ 32,093,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[13],[15] 0.33% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 19,770,000  
Ending balance $ 19,364,000 [1],[2],[13],[15] $ 19,770,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[13],[15] 0.07% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 4,032,000  
Ending balance $ 3,949,000 [1],[2],[13],[15] $ 4,032,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[12],[13],[15] 0.02% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 1,198,000  
Ending balance 1,173,000 [1],[2],[12],[13],[15] $ 1,198,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Rocky MRA Acquisition Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[28]   0.15%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[28] $ 9,253,000  
Ending balance [3],[4],[8],[9],[28]   $ 9,253,000
Investment, Identifier [Axis]: Rocky MRA Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[19] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[19] $ 9,426,000  
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[12],[13],[15] 0.00% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 124,000  
Ending balance $ 1,983,000 [1],[2],[12],[13],[15] $ 124,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[12],[13],[15] 0.00% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 78,000  
Ending balance 649,000 [1],[2],[12],[13],[15] $ 78,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 1,958,000  
Ending balance [3],[4],[8],[9],[16]   $ 1,958,000
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 413,000  
Ending balance [3],[4],[8],[9],[16]   $ 413,000
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   15,000
Fair Value   $ 0
Investment, Identifier [Axis]: SG Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.08% [1],[2],[10],[13],[14] 2.18% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 132,471,000  
Ending balance 130,811,000 [1],[2],[10],[13],[14] $ 132,471,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: SG Acquisition, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 8,301,000 8,301,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: SQ ABS Issuer LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 6,031,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 6,031,000
Investment, Identifier [Axis]: SQ ABS Issuer LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 3,995,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 3,995,000
Investment, Identifier [Axis]: SQ ABS Issuer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 5,362,000  
Investment, Identifier [Axis]: SQ ABS Issuer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 3,584,000  
Investment, Identifier [Axis]: STV Group, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 0.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 24,042,000  
Investment, Identifier [Axis]: STV Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   0.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] 24,234,000  
Ending balance [3],[4],[5],[9]   $ 24,234,000
Investment, Identifier [Axis]: STV Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 628,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 628,000
Investment, Identifier [Axis]: STV Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,976,000 6,976,000
Fair Value (70,000) (70,000)
Investment, Identifier [Axis]: STV Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,883,000 4,186,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Safety Borrower Holdings LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 5,256,000  
Ending balance [3],[4],[8],[9],[16]   $ 5,256,000
Investment, Identifier [Axis]: Safety Borrower Holdings LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 89,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 89,000
Investment, Identifier [Axis]: Safety Borrower Holdings LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   280,000
Fair Value   $ 0
Investment, Identifier [Axis]: Safety Borrower Holdings, LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[15] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[15] $ 5,230,000  
Investment, Identifier [Axis]: Safety Borrower Holdings, LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 136,000  
Investment, Identifier [Axis]: Safety Borrower Holdings, LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 233,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.58% [1],[2],[13],[15] 0.61% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 36,764,000  
Ending balance $ 36,575,000 [1],[2],[13],[15] $ 36,764,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[13],[15] 0.26% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 15,798,000  
Ending balance $ 15,720,000 [1],[2],[13],[15] $ 15,798,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[13],[15] 0.19% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 11,406,000  
Ending balance $ 11,353,000 [1],[2],[13],[15] $ 11,406,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[13],[15] 0.16% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 9,951,000  
Ending balance $ 9,921,000 [1],[2],[13],[15] $ 9,951,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[12],[13],[14],[15] 0.03% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 1,800,000  
Ending balance $ 2,600,000 [1],[2],[12],[13],[14],[15] $ 1,800,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[12],[13],[14],[15] 0.10% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 5,980,000  
Ending balance 9,845,000 [1],[2],[12],[13],[14],[15] $ 5,980,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,000,000 5,900,000
Fair Value 0 0
Investment, Identifier [Axis]: Sam Holding Co, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,400,000 4,200,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Scorpio BidCo SAS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[11],[12],[13],[14],[17] 0.38% [3],[4],[6],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 23,362,000  
Ending balance 26,836,000 [1],[2],[11],[12],[13],[14],[17] $ 23,362,000 [3],[4],[6],[7],[8],[9],[18]
Investment, Identifier [Axis]: Scorpio BidCo SAS, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,386,000 4,386,000
Fair Value $ 0 $ (46,000)
Investment, Identifier [Axis]: Seahawk Bidco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.71% [1],[2],[13],[14],[15] 0.66% [3],[4],[6],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 39,844,000  
Ending balance 44,850,000 [1],[2],[13],[14],[15] $ 39,844,000 [3],[4],[6],[9],[16]
Investment, Identifier [Axis]: Seahawk Bidco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,288,000 12,511,000
Fair Value 0 0
Investment, Identifier [Axis]: Seahawk Bidco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,753,000 3,753,000
Fair Value (34,000) $ (34,000)
Investment, Identifier [Axis]: SelectQuote Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[31]   0.90%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[31] $ 54,837,000  
Ending balance [3],[4],[7],[8],[9],[31]   $ 54,837,000
Investment, Identifier [Axis]: SelectQuote Inc. - Warrants    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[11],[13] 0.01% [3],[4],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9] $ 441,000  
Ending balance $ 144,000 [1],[2],[11],[13] $ 441,000 [3],[4],[7],[9]
Investment, Identifier [Axis]: SelectQuote, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[32] 0.52%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[32] $ 32,539,000  
Investment, Identifier [Axis]: Shelf Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[9],[26]   2.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[9],[26] $ 149,131,000  
Ending balance [3],[4],[5],[7],[9],[26]   $ 149,131,000
Investment, Identifier [Axis]: Shelf Bidco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[13],[24] 2.37%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[13],[24] $ 149,131,000  
Investment, Identifier [Axis]: Shelf Holdco Ltd - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[11],[13] 0.00% [3],[4],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9] $ 188,000  
Ending balance 190,000 [1],[2],[11],[13] $ 188,000 [3],[4],[7],[9]
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[7],[8],[9]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 7,965,000  
Ending balance [3],[4],[5],[6],[7],[8],[9]   $ 7,965,000
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,151,000
Fair Value   (11,000)
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,076,000
Fair Value   (11,000)
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[11],[12],[13],[14] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[11],[12],[13],[14] $ 8,462,000  
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,673,000  
Fair Value 0  
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,076,000  
Fair Value (11,000)  
Investment, Identifier [Axis]: Skopima Consilio Parent LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   4,200,000
Fair Value   $ (12,000)
Investment, Identifier [Axis]: Skopima Consilio Parent, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,200,000  
Fair Value $ (84,000)  
Investment, Identifier [Axis]: Smile Doctors, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[10],[13] 0.17% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 10,533,000  
Ending balance $ 10,372,000 [1],[2],[10],[13] $ 10,533,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Smile Doctors, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[10],[12],[13],[14] 0.02% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,484,000  
Ending balance 2,467,000 [1],[2],[10],[12],[13],[14] $ 1,484,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Smile Doctors, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,036,000
Fair Value   0
Investment, Identifier [Axis]: Smile Doctors, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,233,000 1,233,000
Fair Value $ (43,000) $ (31,000)
Investment, Identifier [Axis]: Snoopy Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.25% [1],[2],[10],[13] 5.46% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 332,060,000  
Ending balance 330,335,000 [1],[2],[10],[13] $ 332,060,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: Spaceship Purchaser Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   1.49%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 90,417,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 90,417,000
Investment, Identifier [Axis]: Spaceship Purchaser Inc, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   5,447,000
Fair Value   0
Investment, Identifier [Axis]: Spaceship Purchaser Inc, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   13,072,000
Fair Value   (65,000)
Investment, Identifier [Axis]: Spaceship Purchaser Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   10,894,000
Fair Value   $ (109,000)
Investment, Identifier [Axis]: Spaceship Purchaser, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13],[14] 1.45%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13],[14] $ 91,103,000  
Investment, Identifier [Axis]: Spaceship Purchaser, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 5,447,000  
Fair Value 0  
Investment, Identifier [Axis]: Spaceship Purchaser, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 13,072,000  
Fair Value (65,000)  
Investment, Identifier [Axis]: Spaceship Purchaser, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,894,000  
Fair Value (109,000)  
Investment, Identifier [Axis]: Sparta UK Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9]   0.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9] $ 18,008,000  
Ending balance [3],[4],[6],[7],[8],[9]   $ 18,008,000
Investment, Identifier [Axis]: Sparta UK Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,099,000
Fair Value   $ 0
Investment, Identifier [Axis]: Sparta UK Bidco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 24,038,000  
Investment, Identifier [Axis]: Sparta UK Bidco, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 903,000  
Fair Value $ 0  
Investment, Identifier [Axis]: SpecialtyCare, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[13],[15] 0.19% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 11,621,000  
Ending balance $ 11,679,000 [1],[2],[13],[15] $ 11,621,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: SpecialtyCare, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[12],[13],[14],[17] 0.01% [3],[4],[6],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[18] $ 643,000  
Ending balance $ 580,000 [1],[2],[12],[13],[14],[17] $ 643,000 [3],[4],[6],[8],[9],[18]
Investment, Identifier [Axis]: SpecialtyCare, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[12],[13],[15] 0.00% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 101,000  
Ending balance 101,000 [1],[2],[12],[13],[15] $ 101,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: SpecialtyCare, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 467,000 404,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[11],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 579,000  
Ending balance $ 6,186,000 [1],[2],[11],[13] $ 579,000 [3],[4],[9]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.04% [1],[2],[11],[13],[14],[19] 0.99% [3],[4],[6],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[28] $ 60,058,000  
Ending balance $ 65,577,000 [1],[2],[11],[13],[14],[19] $ 60,058,000 [3],[4],[6],[8],[9],[28]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[11],[12],[13],[19] 0.25% [3],[4],[7],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[28] $ 15,487,000  
Ending balance $ 17,656,000 [1],[2],[11],[12],[13],[19] $ 15,487,000 [3],[4],[7],[8],[9],[28]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[11],[12],[13],[19] 0.03% [3],[4],[7],[8],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[28] $ 1,755,000  
Ending balance 1,043,000 [1],[2],[11],[12],[13],[19] $ 1,755,000 [3],[4],[7],[8],[9],[28]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 12,901,000 16,126,000
Fair Value 0 (121,000)
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 13,135,000 14,298,000
Fair Value 0 $ (107,000)
Investment, Identifier [Axis]: Speedster Bidco GmbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[9],[18]   0.57%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[18] 34,534,000  
Ending balance [3],[4],[7],[9],[18]   $ 34,534,000
Investment, Identifier [Axis]: Speedster Bidco GmbH 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[9],[18]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[9],[18] 11,464,000  
Ending balance [3],[4],[6],[7],[9],[18]   $ 11,464,000
Investment, Identifier [Axis]: Speedster Bidco GmbH 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[28]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[28] $ 2,841,000  
Ending balance [3],[4],[7],[28]   $ 2,841,000
Investment, Identifier [Axis]: Speedster Bidco GmbH, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,801,000
Fair Value   $ (5,000)
Investment, Identifier [Axis]: Speedster Bidco, GmbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[17] 0.59%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[17] $ 36,826,000  
Investment, Identifier [Axis]: Speedster Bidco, GmbH 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[14],[17] 0.21%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[14],[17] $ 13,013,000  
Investment, Identifier [Axis]: Speedster Bidco, GmbH 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[19] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[19] $ 2,843,000  
Investment, Identifier [Axis]: Speedster Bidco, GmbH, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,801,000  
Fair Value $ (8,000)  
Investment, Identifier [Axis]: Spitfire Parent, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.90% [1],[2],[13],[15] 0.94% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 56,832,000  
Ending balance $ 56,571,000 [1],[2],[13],[15] $ 56,832,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[13],[15] 0.35% [3],[4],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[28] $ 20,984,000  
Ending balance $ 20,876,000 [1],[2],[13],[15] $ 20,984,000 [3],[4],[9],[28]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[12],[13],[15] 0.17% [3],[4],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] $ 10,496,000  
Ending balance 11,874,000 [1],[2],[12],[13],[15] $ 10,496,000 [3],[4],[8],[9],[16]
Investment, Identifier [Axis]: Stamps.com, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 3,224,000  
Ending balance [3],[4],[5],[8],[9]   $ 3,224,000
Investment, Identifier [Axis]: Stamps.com, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9]   4.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 274,131,000  
Ending balance [3],[4],[5],[9]   $ 274,131,000
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 0.33% [1],[2] 0.53% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 31,987,000  
Ending balance $ 20,521,000 [1],[2] $ 31,987,000 [3],[4]
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[10],[13] 0.04% [3],[4],[5],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9],[16] $ 2,699,000  
Ending balance $ 2,685,000 [1],[2],[10],[13] $ 2,699,000 [3],[4],[5],[8],[9],[16]
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13],[14] 0.00% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 74,000  
Ending balance 203,000 [1],[2],[10],[12],[13],[14] $ 74,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 540,000 671,000
Fair Value 0 0
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 371,000 371,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: TCFI AEVEX, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.72% [1],[2],[13],[15] 1.80% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 109,088,000  
Ending balance 107,975,000 [1],[2],[13],[15] $ 109,088,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: TEI Intermediate LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[9],[10]   0.42%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9],[10] 25,541,000  
Ending balance [3],[4],[5],[9],[10]   $ 25,541,000
Investment, Identifier [Axis]: TEI Intermediate LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9],[10]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9],[10] $ 336,000  
Ending balance [3],[4],[5],[6],[8],[9],[10]   $ 336,000
Investment, Identifier [Axis]: TEI Intermediate LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   8,256,000
Fair Value   (41,000)
Investment, Identifier [Axis]: TEI Intermediate LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,096,000
Fair Value   $ 0
Investment, Identifier [Axis]: TEI Intermediate, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.41%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 25,670,000  
Investment, Identifier [Axis]: TEI Intermediate, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 437,000  
Investment, Identifier [Axis]: TEI Intermediate, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,256,000  
Fair Value (41,000)  
Investment, Identifier [Axis]: TEI Intermediate, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,013,000  
Fair Value 0  
Investment, Identifier [Axis]: THG Acquisition LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 11,606,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 11,606,000
Investment, Identifier [Axis]: THG Acquisition LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,598,000
Fair Value   (13,000)
Investment, Identifier [Axis]: THG Acquisition LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,202,000
Fair Value   $ 0
Investment, Identifier [Axis]: THG Acquisition, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.18%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 11,623,000  
Investment, Identifier [Axis]: THG Acquisition, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 179,000  
Investment, Identifier [Axis]: THG Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,515,000  
Fair Value 0  
Investment, Identifier [Axis]: THG Acquisition, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,202,000  
Fair Value $ 0  
Investment, Identifier [Axis]: THL Fund IX Investors (Plymouth II), LP - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 346,000  
Ending balance $ 448,000 [1],[2],[13] $ 346,000 [3],[4],[9]
Investment, Identifier [Axis]: TPG IX Newark CI, L.P. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[13] 0.03% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 1,966,000  
Ending balance $ 1,966,000 [1],[2],[13] $ 1,966,000 [3],[4],[9]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[2],[13],[15] 0.63% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 38,101,000  
Ending balance $ 38,288,000 [1],[2],[13],[15] $ 38,101,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[12],[13],[14],[15] 0.21% [3],[4],[6],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 13,003,000  
Ending balance 22,466,000 [1],[2],[12],[13],[14],[15] $ 13,003,000 [3],[4],[6],[8],[9],[16]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,346,000 10,766,000
Fair Value $ 0 $ (54,000)
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.73% [1],[2],[13],[15] 0.77% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 46,602,000  
Ending balance 45,778,000 [1],[2],[13],[15] $ 46,602,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: Tango Bidco SAS 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 12,124,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 12,124,000
Investment, Identifier [Axis]: Tango Bidco SAS 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 2,596,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 2,596,000
Investment, Identifier [Axis]: Tango Bidco SAS, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   962,000
Fair Value   (6,000)
Investment, Identifier [Axis]: Tango Bidco SAS, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   2,305,000
Fair Value   $ 0
Investment, Identifier [Axis]: Tango Bidco, SAS 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.22%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 13,845,000  
Investment, Identifier [Axis]: Tango Bidco, SAS 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 3,768,000  
Investment, Identifier [Axis]: Tango Bidco, SAS, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 962,000  
Fair Value (7,000)  
Investment, Identifier [Axis]: Tango Bidco, SAS, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 1,580,000  
Fair Value 0  
Investment, Identifier [Axis]: Tennessee Bidco Limited 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[9],[18]   1.46%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[18] 88,637,000  
Ending balance [3],[4],[7],[9],[18]   $ 88,637,000
Investment, Identifier [Axis]: Tennessee Bidco Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 5,633,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 5,633,000
Investment, Identifier [Axis]: Tennessee Bidco Limited 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.92%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 55,671,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 55,671,000
Investment, Identifier [Axis]: Tennessee Bidco Limited 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] 2,971,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 2,971,000
Investment, Identifier [Axis]: Tennessee Bidco Limited 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] 1,926,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 1,926,000
Investment, Identifier [Axis]: Tennessee Bidco Limited 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[18]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 1,717,000  
Ending balance [3],[4],[7],[8],[9],[18]   $ 1,717,000
Investment, Identifier [Axis]: Tennessee Bidco Limited, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   22,998,000
Fair Value   $ 0
Investment, Identifier [Axis]: Tennessee Bidco, Limited 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[13],[17] 1.34%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[13],[17] $ 84,166,000  
Investment, Identifier [Axis]: Tennessee Bidco, Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 5,348,000  
Investment, Identifier [Axis]: Tennessee Bidco, Limited 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.99%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 62,282,000  
Investment, Identifier [Axis]: Tennessee Bidco, Limited 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 3,453,000  
Investment, Identifier [Axis]: Tennessee Bidco, Limited 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 2,235,000  
Investment, Identifier [Axis]: Tennessee Bidco, Limited 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 1,992,000  
Investment, Identifier [Axis]: Tennessee Bidco, Limited, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 22,998,000  
Fair Value 0  
Investment, Identifier [Axis]: Tennessee Bidco, Limited, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 24,577,000  
Fair Value $ (127,000)  
Investment, Identifier [Axis]: The Fertility Partners, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[10],[11],[12],[13] 0.08% [3],[4],[5],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] $ 4,837,000  
Ending balance $ 4,761,000 [1],[2],[10],[11],[12],[13] $ 4,837,000 [3],[4],[5],[7],[8],[9]
Investment, Identifier [Axis]: The Fertility Partners, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[10],[11],[12],[13] 0.05% [3],[4],[5],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[8],[9] $ 3,188,000  
Ending balance $ 3,312,000 [1],[2],[10],[11],[12],[13] $ 3,188,000 [3],[4],[5],[7],[8],[9]
Investment, Identifier [Axis]: The Fertility Partners, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[11],[12],[13],[14] 0.00% [3],[4],[5],[6],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 58,000  
Ending balance 186,000 [1],[2],[10],[11],[12],[13],[14] $ 58,000 [3],[4],[5],[6],[7],[8],[9]
Investment, Identifier [Axis]: The Fertility Partners, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 60,000 211,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: The GI Alliance Management, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 4,065,000  
Ending balance [3],[4],[8],[9],[16]   $ 4,065,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 451,000  
Ending balance [3],[4],[8],[9],[16]   $ 451,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[16] 876,000  
Ending balance [3],[4],[8],[9],[16]   $ 876,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[16]   0.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[16] $ 10,913,000  
Ending balance [3],[4],[6],[8],[9],[16]   $ 10,913,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   35,604,000
Fair Value   $ 0
Investment, Identifier [Axis]: The Hiller Companies, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10] 0.13% [1],[2],[13] 0.13% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9],[10] $ 8,152,000  
Ending balance [10] $ 8,111,000 [1],[2],[13] $ 8,152,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: The Hiller Companies, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [10] 0.03% [1],[2],[12],[13],[14] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9],[10] $ 542,000  
Ending balance [10] 1,922,000 [1],[2],[12],[13],[14] $ 542,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: The Hiller Companies, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 310,000 1,696,000
Fair Value 0 0
Investment, Identifier [Axis]: The Hiller Companies, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,432,000 1,432,000
Fair Value (11,000) $ (11,000)
Investment, Identifier [Axis]: The North Highland Co LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9]   0.26%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] 15,862,000  
Ending balance [3],[4],[5],[8],[9]   $ 15,862,000
Investment, Identifier [Axis]: The North Highland Co LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 772,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 772,000
Investment, Identifier [Axis]: The North Highland Co LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,903,000
Fair Value   (30,000)
Investment, Identifier [Axis]: The North Highland Co LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,373,000
Fair Value   $ 0
Investment, Identifier [Axis]: The North Highland Co, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13] 0.25%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13] $ 15,863,000  
Investment, Identifier [Axis]: The North Highland Co, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 2,732,000  
Investment, Identifier [Axis]: The North Highland Co, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,903,000  
Fair Value (30,000)  
Investment, Identifier [Axis]: The North Highland Co, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,434,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Thevelia US, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[11],[12],[19] 0.02% [3],[4],[7],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9],[28] $ 1,292,000  
Ending balance $ 1,279,000 [1],[2],[11],[12],[19] $ 1,292,000 [3],[4],[7],[9],[28]
Investment, Identifier [Axis]: Thevelia US, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[19] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[19] $ 4,920,000  
Investment, Identifier [Axis]: Thevelia US, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[8],[9],[28]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[28] $ 4,920,000  
Ending balance [3],[4],[7],[8],[9],[28]   $ 4,920,000
Investment, Identifier [Axis]: Titan Investment Company, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[2],[13],[17] 0.63% [3],[4],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[18] $ 38,488,000  
Ending balance $ 38,286,000 [1],[2],[13],[17] $ 38,488,000 [3],[4],[9],[18]
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[15] 0.37%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[15] $ 23,087,000  
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,595,000  
Fair Value (23,000)  
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,872,000  
Fair Value $ (29,000)  
Investment, Identifier [Axis]: Tricentis, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,549,000
Fair Value   0
Investment, Identifier [Axis]: Tricentis, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,843,000
Fair Value   0
Investment, Identifier [Axis]: Tricentis, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   22,745,000
Fair Value   $ 0
Investment, Identifier [Axis]: Tricor Horizon - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[11],[13] 0.01% [3],[4],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[9] $ 416,000  
Ending balance 426,000 [1],[2],[11],[13] $ 416,000 [3],[4],[7],[9]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp - Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[9]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 6,000  
Ending balance [3],[4],[9]   $ 6,000
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. - Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13] $ 6,000  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.95% [1],[2],[10],[13] 0.99% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 59,901,000  
Ending balance $ 59,901,000 [1],[2],[10],[13] $ 59,901,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.55% [1],[2],[10],[13],[14] 0.46% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 27,747,000  
Ending balance 34,698,000 [1],[2],[10],[13],[14] $ 27,747,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,907,000
Fair Value   0
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,269,000 7,269,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Trinity Partners Holdings LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15],[24] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15],[24] $ 4,685,000  
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[9],[16],[26]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16],[26] 4,687,000  
Ending balance [3],[4],[6],[9],[16],[26]   $ 4,687,000
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,433,000 1,433,000
Fair Value $ 0 $ (14,000)
Investment, Identifier [Axis]: Triple Lift, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[2],[10],[13] 0.21% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 12,884,000  
Ending balance $ 13,124,000 [1],[2],[10],[13] $ 12,884,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Triple Lift, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.71% [1],[2],[10],[13],[14] 0.75% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 45,394,000  
Ending balance 44,895,000 [1],[2],[10],[13],[14] $ 45,394,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: Triple Lift, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,697,000 7,697,000
Fair Value $ (308,000) $ (308,000)
Investment, Identifier [Axis]: Turing Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[11],[12],[13],[17] 0.14% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 8,766,000  
Ending balance $ 8,727,000 [1],[2],[11],[12],[13],[17] $ 8,766,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[11],[12],[13],[17] 0.07% [3],[4],[6],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 4,363,000  
Ending balance $ 4,340,000 [1],[2],[11],[12],[13],[17] $ 4,363,000 [3],[4],[6],[7],[8],[9],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[2],[11],[12],[13],[17] 0.19% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 11,707,000  
Ending balance $ 13,252,000 [1],[2],[11],[12],[13],[17] $ 11,707,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[11],[12],[13],[17] 0.07% [3],[4],[7],[8],[9],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[8],[9],[18] $ 4,482,000  
Ending balance $ 5,041,000 [1],[2],[11],[12],[13],[17] $ 4,482,000 [3],[4],[7],[8],[9],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[10],[11],[13],[14] 0.34% [3],[4],[5],[7],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[9] $ 20,630,000  
Ending balance $ 20,520,000 [1],[2],[10],[11],[13],[14] $ 20,630,000 [3],[4],[5],[7],[9]
Investment, Identifier [Axis]: Turing Holdco, Inc. 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[10],[11],[12],[13],[14] 0.32% [3],[4],[5],[6],[7],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[7],[8],[9] $ 19,408,000  
Ending balance 21,165,000 [1],[2],[10],[11],[12],[13],[14] $ 19,408,000 [3],[4],[5],[6],[7],[8],[9]
Investment, Identifier [Axis]: Turing Holdco, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 28,117,000 28,117,000
Fair Value 0 0
Investment, Identifier [Axis]: Turing Holdco, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 20,901,000 20,901,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: UMP Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.02% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,079,000  
Ending balance $ 1,073,000 [1],[2],[10],[12],[13] $ 1,079,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: UMP Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[10],[12],[13] 0.02% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 1,480,000  
Ending balance $ 1,469,000 [1],[2],[10],[12],[13] $ 1,480,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.59% [1],[2],[10],[13] 0.61% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 37,021,000  
Ending balance $ 37,021,000 [1],[2],[10],[13] $ 37,021,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[10],[13] 0.26% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 15,616,000  
Ending balance $ 15,616,000 [1],[2],[10],[13] $ 15,616,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.54% [1],[2],[10],[13],[14] 0.45% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 27,426,000  
Ending balance $ 34,187,000 [1],[2],[10],[13],[14] $ 27,426,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[10],[12],[13] 0.00% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 83,000  
Ending balance 83,000 [1],[2],[10],[12],[13] $ 83,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 34,998,000 41,551,000
Fair Value 0 (208,000)
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,735,000 3,735,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Unified Women's Healthcare LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[8],[9],[28]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[8],[9],[28] 2,081,000  
Ending balance [3],[4],[8],[9],[28]   $ 2,081,000
Investment, Identifier [Axis]: Unified Women's Healthcare LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[8],[9],[28]   0.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[8],[9],[28] $ 19,419,000  
Ending balance [3],[4],[6],[8],[9],[28]   $ 19,419,000
Investment, Identifier [Axis]: Unified Women's Healthcare LP, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   2,895,000
Fair Value   0
Investment, Identifier [Axis]: Unified Women's Healthcare LP, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   44,793,000
Fair Value   0
Investment, Identifier [Axis]: Unified Women's Healthcare LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   241,000
Fair Value   $ 0
Investment, Identifier [Axis]: Unified Women's Healthcare, LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[19] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[19] $ 2,071,000  
Investment, Identifier [Axis]: Unified Women's Healthcare, LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[19] 0.36%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[19] $ 22,461,000  
Investment, Identifier [Axis]: Unified Women's Healthcare, LP 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13],[14],[19] 0.49%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13],[14],[19] $ 30,526,000  
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 14,190,000  
Fair Value 0  
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 241,000  
Fair Value 0  
Investment, Identifier [Axis]: Varicent Parent Holdings Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 11,998,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 11,998,000
Investment, Identifier [Axis]: Varicent Parent Holdings Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,794,000
Fair Value   (21,000)
Investment, Identifier [Axis]: Varicent Parent Holdings Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,557,000
Fair Value   $ (23,000)
Investment, Identifier [Axis]: Varicent Parent Holdings Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.20%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 12,417,000  
Investment, Identifier [Axis]: Varicent Parent Holdings Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,352,000  
Fair Value (18,000)  
Investment, Identifier [Axis]: Varicent Parent Holdings Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,557,000  
Fair Value $ (23,000)  
Investment, Identifier [Axis]: Veregy Consolidated, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.44% [1],[2],[10],[12],[13],[14] 0.34% [3],[4],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[16] $ 20,479,000  
Ending balance 27,504,000 [1],[2],[10],[12],[13],[14] $ 20,479,000 [3],[4],[16]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,436,000  
Fair Value (9,000)  
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,845,000  
Fair Value $ (44,000)  
Investment, Identifier [Axis]: Victory Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[13],[19] 0.15% [3],[4],[9],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[28] $ 9,188,000  
Ending balance 9,427,000 [1],[2],[13],[19] $ 9,188,000 [3],[4],[9],[28]
Investment, Identifier [Axis]: WHCG Purchaser III Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] 19,921,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 19,921,000
Investment, Identifier [Axis]: WHCG Purchaser III Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[8],[9],[25]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9],[25] $ 6,167,000  
Ending balance [3],[4],[5],[8],[9],[25]   $ 6,167,000
Investment, Identifier [Axis]: WHCG Purchaser III Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,044,000
Fair Value   $ 0
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.33%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 20,467,000  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[23] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[23] $ 7,121,000  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,044,000  
Fair Value $ 0  
Investment, Identifier [Axis]: WHCG Purchaser, Inc. - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 0  
Ending balance $ 0 [1],[2],[13] $ 0 [3],[4],[9]
Investment, Identifier [Axis]: WPEngine, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.06% [1],[2],[10],[13],[14] 1.09% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 66,467,000  
Ending balance 66,467,000 [1],[2],[10],[13],[14] $ 66,467,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: WPEngine, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,667,000 6,667,000
Fair Value (200,000) $ (200,000)
Investment, Identifier [Axis]: Water Holdings Acquisition LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[9]   0.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 31,057,000  
Ending balance [3],[4],[5],[6],[9]   $ 31,057,000
Investment, Identifier [Axis]: Water Holdings Acquisition LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,754,000
Fair Value   $ 0
Investment, Identifier [Axis]: Water Holdings Acquisition, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 0.50%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 31,551,000  
Investment, Identifier [Axis]: Water Holdings Acquisition, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 2,286,000  
Investment, Identifier [Axis]: Water Holdings Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,708,000  
Fair Value $ 0  
Investment, Identifier [Axis]: West Monroe Partners, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[10],[13] 0.24% [3],[4],[5],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[9] $ 14,450,000  
Ending balance $ 14,376,000 [1],[2],[10],[13] $ 14,450,000 [3],[4],[5],[9]
Investment, Identifier [Axis]: West Monroe Partners, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13],[14] 0.01% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 494,000  
Ending balance 587,000 [1],[2],[10],[12],[13],[14] $ 494,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: West Monroe Partners, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,500,000 2,500,000
Fair Value 0 0
Investment, Identifier [Axis]: West Monroe Partners, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,347,000 1,443,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[12],[13] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[12],[13] $ 2,136,000  
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 56,000  
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 451,000  
Fair Value (2,000)  
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 241,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Windows Acquisition Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.67% [1],[2],[12],[13],[15] 0.70% [3],[4],[5],[8],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9],[16] $ 42,274,000  
Ending balance $ 42,026,000 [1],[2],[12],[13],[15] $ 42,274,000 [3],[4],[5],[8],[9],[16]
Investment, Identifier [Axis]: World Insurance Associates, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.55% [1],[2],[13],[15] 0.62% [3],[4],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9],[16] $ 37,826,000  
Ending balance $ 34,563,000 [1],[2],[13],[15] $ 37,826,000 [3],[4],[9],[16]
Investment, Identifier [Axis]: World Insurance Associates, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[13],[15] 0.53% [3],[4],[6],[9],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[9],[16] $ 32,343,000  
Ending balance $ 33,200,000 [1],[2],[13],[15] $ 32,343,000 [3],[4],[6],[9],[16]
Investment, Identifier [Axis]: World Insurance Associates, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[13],[14],[15] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[13],[14],[15] $ 3,555,000  
Investment, Identifier [Axis]: World Insurance Associates, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 40,362,000 14,682,000
Fair Value (199,000) 0
Investment, Identifier [Axis]: World Insurance Associates, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,473,000 2,939,000
Fair Value $ (66,000) $ 0
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[10],[12],[13] 0.13% [3],[4],[5],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[8],[9] $ 7,816,000  
Ending balance $ 7,848,000 [1],[2],[10],[12],[13] $ 7,816,000 [3],[4],[5],[8],[9]
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[10],[12],[13],[14] 0.00% [3],[4],[5],[6],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 47,000  
Ending balance 663,000 [1],[2],[10],[12],[13],[14] $ 47,000 [3],[4],[5],[6],[8],[9]
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,937,000 3,286,000
Fair Value 0 (16,000)
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,262,000 1,499,000
Fair Value 0 0
Investment, Identifier [Axis]: Zellis TopCo Limited, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,765,000
Fair Value   $ 0
Investment, Identifier [Axis]: Zendesk Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[6],[8],[9]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[8],[9] $ 1,614,000  
Ending balance [3],[4],[5],[6],[8],[9]   $ 1,614,000
Investment, Identifier [Axis]: Zendesk Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   361,000
Fair Value   (5,000)
Investment, Identifier [Axis]: Zendesk Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   169,000
Fair Value   $ 0
Investment, Identifier [Axis]: Zendesk, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 1,719,000  
Investment, Identifier [Axis]: Zendesk, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 247,000  
Fair Value 0  
Investment, Identifier [Axis]: Zendesk, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 169,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Zeus, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[10],[13],[14] 0.43% [3],[4],[5],[6],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[6],[9] $ 26,009,000  
Ending balance 25,702,000 [1],[2],[10],[13],[14] $ 26,009,000 [3],[4],[5],[6],[9]
Investment, Identifier [Axis]: Zeus, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,284,000 2,969,000
Fair Value 0 0
Investment, Identifier [Axis]: Zeus, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,426,000 3,426,000
Fair Value $ (17,000) $ (17,000)
Investment, Identifier [Axis]: Zoro - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[13] 0.00% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 22,000  
Ending balance $ 23,000 [1],[2],[13] $ 22,000 [3],[4],[9]
Investment, Identifier [Axis]: Zoro - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[13] 0.01% [3],[4],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[9] $ 492,000  
Ending balance 368,000 [1],[2],[13] $ 492,000 [3],[4],[9]
Investment, Identifier [Axis]: Zorro Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[6],[7],[8],[9],[18]   0.53%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[6],[7],[8],[9],[18] $ 32,502,000  
Ending balance [3],[4],[6],[7],[8],[9],[18]   $ 32,502,000
Investment, Identifier [Axis]: Zorro Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,647,000
Fair Value   $ (73,000)
Investment, Identifier [Axis]: Zorro Bidco, Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[14],[17] 0.62%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[14],[17] $ 39,250,000  
Investment, Identifier [Axis]: Zorro Bidco, Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 4,301,000  
Investment, Identifier [Axis]: Zorro Bidco, Ltd. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[11],[12],[13],[17] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[11],[12],[13],[17] $ 4,540,000  
Investment, Identifier [Axis]: Zorro Bidco, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,201,000  
Fair Value $ 0  
Investment, Identifier [Axis]: eResearchTechnology, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[13] 2.41%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[13] $ 151,265,000  
Investment, Identifier [Axis]: eResearchTechnology, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[10],[12],[13],[14] 0.46%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[10],[12],[13],[14] $ 28,719,000  
Investment, Identifier [Axis]: eResearchTechnology, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 24,793,000  
Fair Value 0  
Investment, Identifier [Axis]: eResearchTechnology, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 14,414,000  
Fair Value $ (144,000)  
[1]
(1)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 June 30, 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.
[2] 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 June 30, 2025, the aggregate fair value of these securities is $13,251.4 million or 210.76% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[3] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities.” As of December 31, 2024, the aggregate fair value of these securities is $13,092.5 million or 215.43% 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 dollars. As of December 31, 2024, 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 December 31, 2024 was 0.75%.
[6] 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:
[7] 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, 2024, non-qualifying assets represented 14.8% of total assets as calculated in accordance with regulatory requirements.
[8] 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.
[9] 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.
[10] The interest rate floor on these investments as of June 30, 2025 was 0.75%.
[11] 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 June 30, 2025, non-qualifying assets represented 14.6% of total assets as calculated in accordance with regulatory requirements.
[12] 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.
[13] 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.
[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] The interest rate floor on these investments as of June 30, 2025 was 1.00%.
[16] The interest rate floor on these investments as of December 31, 2024 was 1.00%.
[17] There are no interest rate floors on these investments.
[18] There are no interest rate floors on these investments.
[19] The interest rate floor on these investments as of June 30, 2025 was 0.50%.
[20] The interest rate floor on these investments as of December 31, 2024 was 1.50%.
[21] 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 June 30, 2025, the Company’s non-controlled/affiliated investments were as follows:
[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, 2024, the Company’s non-controlled/affiliated investments were as follows:
Fair Value as of December 31, 2023
Gross AdditionsGross ReductionsNet Change in Unrealized Gains (Losses)Net Realized Gain (Loss)
Fair Value as of December 31, 2024
Dividend and Interest Income
Non-controlled/Affiliated Investments
Blackstone Donegal Holdings LP$5,790 $— $— $613 $— $6,403 $— 
Material Holdings, LLC— 21,384 — 163 — 21,547 1,378 
Material Holdings, LLC— 5,114 — (3,717)— 1,397 314 
Material+ Holding Company, LLC— — — — — — — 
Total$5,790 $26,498 $— $(2,941)$— $29,347 $1,692 
[23] Loan was on non-accrual status as of June 30, 2025.
[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, 2024.
[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 December 31, 2024 was 1.25%.
[28] The interest rate floor on these investments as of December 31, 2024 was 0.50%.
[29] The interest rate floor on these investments as of December 31, 2024 was 2.00%.
[30] For unsettled positions the interest rate does not include the base rate.
[31] The interest rate floor on these investments as of December 31, 2024 was 3.00%.
[32] The interest rate floor on these investments as of June 30, 2025 was 3.00%.
v3.25.2
Condensed Consolidated Schedule of Investments - Derivatives (Parenthetical)
€ in Thousands, £ in Thousands, kr in Thousands, $ in Thousands, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Jun. 30, 2025
CAD ($)
Jun. 30, 2025
EUR (€)
Jun. 30, 2025
GBP (£)
Jun. 30, 2025
SEK (kr)
Dec. 31, 2024
CAD ($)
Dec. 31, 2024
EUR (€)
Dec. 31, 2024
GBP (£)
Dec. 31, 2024
SEK (kr)
Open Forward Foreign Currency Contract [Line Items]                    
Notional $ 188,193 $ 700,000                
Notional 1,600,000 571,016                
Unrealized Appreciation (Depreciation) 2,646 2,401                
Investment at cost 13,327,359 13,193,219                
Investments at fair value $ 13,252,800 $ 13,092,518                
Investment, Type [Extensible Enumeration] 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 $ 58,793 $ 56,412                
Notional     $ 80,000       $ 80,000      
Unrealized Appreciation (Depreciation) (167) 719                
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 2                    
Open Forward Foreign Currency Contract [Line Items]                    
Notional 75,344 68,801                
Notional | €       € 65,250       € 65,250    
Unrealized Appreciation (Depreciation) (1,848) 1,043                
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 3                    
Open Forward Foreign Currency Contract [Line Items]                    
Notional 39,958 37,395                
Notional | £         £ 29,500       £ 29,500  
Unrealized Appreciation (Depreciation) (539) 482                
Open Forward Foreign Currency Contract, Identifier [Axis]: Wells Fargo Bank, N.A. 4                    
Open Forward Foreign Currency Contract [Line Items]                    
Notional 14,098 8,408                
Notional | kr           kr 133,956       kr 91,000
Unrealized Appreciation (Depreciation) (92) 157                
Foreign Currency Forward Contracts                    
Open Forward Foreign Currency Contract [Line Items]                    
Unrealized Appreciation (Depreciation) (2,646) 2,401                
Interest Rate Swap                    
Open Forward Foreign Currency Contract [Line Items]                    
Notional 0 700,000                
Notional 1,600,000 400,000                
Investments at fair value 22,991 (3,169)                
Upfront Payments / Receipts 0 0                
Change in Unrealized Appreciation (Depreciation) $ 26,161 [1] $ (3,169) [2]                
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%
Company Pays 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 8,969 3,995                
Upfront Payments / Receipts 0 0                
Change in Unrealized Appreciation (Depreciation) $ 4,974 [1] $ 3,995 [2]                
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%
Company Pays 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 1,913 (5,855)                
Upfront Payments / Receipts 0 0                
Change in Unrealized Appreciation (Depreciation) $ 7,769 [1] $ (5,855) [2]                
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%
Company Pays 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 3,718 (1,309)                
Upfront Payments / Receipts 0 0                
Change in Unrealized Appreciation (Depreciation) $ 5,027 [1] $ (1,309) [2]                
Interest Rate Swap 4                    
Open Forward Foreign Currency Contract [Line Items]                    
Company Receives 5.30%   5.30% 5.30% 5.30% 5.30%        
Company Pays 1.46%   1.46% 1.46% 1.46% 1.46%        
Investment at cost $ 500,000                  
Investments at fair value 8,391                  
Upfront Payments / Receipts 0                  
Change in Unrealized Appreciation (Depreciation) [1] $ 8,391                  
[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.
[2] 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.
v3.25.2
Organization
 6 Months Ended
Jun. 30, 2025
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.
v3.25.2
Significant Accounting Policies
 6 Months Ended
Jun. 30, 2025
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, 2025.
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 June 30, 2025, 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.
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 and year 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 and six months ended June 30, 2025, the Company recorded $1.7 million and $14.6 million, respectively, in non-recurring interest income (e.g., prepayment premiums, accelerated accretion of upfront loan origination fees and unamortized discounts). For the three and six months ended June 30, 2024, the Company recorded $0.4 million and $2.3 million, respectively, in non-recurring interest income.
PIK Income
The Company has loans 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.
Fee 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 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 status 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 June 30, 2025. 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 and six months ended June 30, 2025, the Company incurred $3.8 million and $8.0 million, respectively, of U.S. federal excise tax. For the three and six months ended June 30, 2024, the Company incurred $3.4 million and $6.8 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 2023, the FASB issued ASU 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” (“ASU 2023-09”). ASU 2023-09 requires additional disaggregated disclosures on the entity’s effective tax rate reconciliation and additional details on income taxes paid. ASU 2023-09 is effective on a prospective basis, with the option for retrospective application, for annual periods beginning after December 15, 2024 and early adoption is permitted. The Company does not expect the adoption of ASU 2023-09 to have a material impact on its condensed consolidated financial statements.
v3.25.2
Agreements and Related Party Transactions
 6 Months Ended
Jun. 30, 2025
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 30, 2025, for a one-year period ending on May 31, 2026, 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 and six months ended June 30, 2025, base management fees were $34.6 million and $68.9 million, respectively. For the three and six months ended June 30, 2024, base management fees were $28.1 million and $54.1 million, respectively.
As of June 30, 2025 and December 31, 2024, $34.6 million and $32.3 million, respectively, was payable to the Adviser and the Prior Adviser, as applicable, 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 fees:
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 as defined in the Investment Advisory Agreement. 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 (“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.
(ii) Capital gains based incentive fees:
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 and six months ended June 30, 2025, the Company accrued income based incentive fees of $34.7 million and $69.0 million, respectively. For the three and six months ended June 30, 2024, the Company accrued income based incentive fees of $37.4 million and $73.2 million, respectively.
As of June 30, 2025 and December 31, 2024, there was $34.7 million and $38.7 million, respectively, payable to the Adviser and the Prior Adviser, as applicable, for income based incentive fees.
For the three and six months ended June 30, 2025, the Company accrued no capital gains based incentive fees. For the three and six months ended June 30, 2024, the Company accrued capital gains based incentive fees of $3.1 million and $6.3 million, respectively. As of June 30, 2025 and December 31, 2024, no amount was payable to the Adviser and the Prior Adviser, as applicable, 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 of 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 become 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 State Street Sub-Administration Agreement with State Street Bank and Trust Company (each as defined in Note 3—Sub-Administration and Custody Agreement) 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 30, 2025, for a one-year period ending on May 31, 2026, 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 and six months ended June 30, 2025 and 2024. 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 and six months ended June 30, 2025, the Company incurred $0.7 million and $1.7 million, respectively, in expenses under the Administration Agreement, which were recorded in Administrative service expenses in the Company’s Condensed Consolidated Statements of Operations. For the three and six months ended June 30, 2024, the Company incurred $0.8 million and $1.4 million, respectively, in expenses under the Prior Administration Agreement, which were recorded in Administrative service expenses in the Company’s Condensed Consolidated Statements of Operations.
As of June 30, 2025 and December 31, 2024, $1.3 million and $1.5 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 a third-party sub-administration agreement (the “State Street Sub-Administration Agreement”) with State Street Bank and Trust Company (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.
Expense Support and Conditional Reimbursement Agreement
On December 12, 2018, the Company entered into an Expense Support and Conditional Reimbursement Agreement (the “Expense Support Agreement”) with the Sub-Adviser pursuant to which the Sub-Adviser was able to elect to pay certain expenses of the Company on the Company’s behalf (each, an “Expense Payment”) and the Company was required to pay the Excess Operating Funds (as defined in the Expense Support Agreement), or a portion thereof (any such payments required to be made by the Company to the Sub-Adviser, a “Reimbursement Payment”), to the Sub-Adviser until such time as all Expense Payments made by the Sub-Adviser to the Company within three years prior to the last business day of such calendar quarter were reimbursed.
The Expense Support Agreement terminated by its own terms on October 28, 2021. The Company’s obligation to make Reimbursement Payments terminated on October 28, 2024. As of June 30, 2024, there were no amounts subject to the Reimbursement Payment obligation. As of June 30, 2024, there were no unreimbursed Expense Payments remaining. For the three and six months ended June 30, 2024, the Sub-Adviser made no Expense Payments. For the three and six months ended June 30, 2024, the Company made no Reimbursement Payments related to Expense Payments by the Sub-Adviser.
v3.25.2
Investments
 6 Months Ended
Jun. 30, 2025
Schedule of Investments [Abstract]  
Investments Investments
The composition of the Company’s investment portfolio at cost and fair value was as follows:
June 30, 2025December 31, 2024
CostFair Value% of Total
Investments at
Fair Value		CostFair Value% of Total
Investments at
Fair Value
First lien debt$13,113,676 $13,015,201 98.2 %$12,959,332 $12,830,389 98.0 %
Second lien debt123,559 122,942 0.9 122,634 119,184 0.9 
Unsecured debt14,009 13,721 0.1 33,644 33,521 0.3 
Equity76,115 100,936 0.8 77,609 109,424 0.8 
Total$13,327,359 $13,252,800 100.0 %$13,193,219 $13,092,518 100.0 %
The industry composition of investments at fair value was as follows:
June 30, 2025December 31, 2024
Aerospace & Defense4.4 %4.4 %
Air Freight & Logistics2.1 3.0 
Auto Components (1)(2)
0.0 0.0 
Biotechnology0.1 — 
Building Products2.3 2.4 
Chemicals0.3 0.3 
Commercial Services & Supplies8.2 7.7 
Construction & Engineering0.8 0.8 
Consumer Staples Distribution & Retail (1)
0.0 — 
Containers & Packaging0.2 0.2 
Distributors3.0 3.1 
Diversified Consumer Services4.3 4.6 
Diversified Telecommunication Services1.0 1.0 
Electric Utilities1.0 1.1 
Electrical Equipment0.8 0.8 
Electronic Equipment, Instruments & Components2.0 1.9 
Energy Equipment & Services0.2 0.2 
Financial Services0.5 0.3 
Ground Transportation0.1 0.2 
Health Care Equipment & Supplies0.4 0.7 
Health Care Providers & Services9.6 9.2 
Health Care Technology5.2 5.0 
Insurance8.2 7.4 
Interactive Media & Services0.4 0.5 
Internet & Direct Marketing Retail— 2.4 
IT Services5.4 4.4 
Life Sciences Tools & Services0.9 0.6 
Machinery0.3 0.2 
Marine0.5 0.4 
Media0.6 0.4 
June 30, 2025December 31, 2024
Oil, Gas & Consumable Fuels0.6 %0.6 %
Paper & Forest Products
0.1 0.1 
Pharmaceuticals0.3 0.2 
Professional Services8.8 8.4 
Real Estate Management & Development1.2 1.1 
Software20.3 20.1 
Specialty Retail1.4 1.3 
Technology Hardware, Storage & Peripherals0.6 0.6 
Trading Companies & Distributors0.9 1.0 
Transportation Infrastructure2.8 3.4 
Wireless Telecommunication Services0.2 — 
Total100.0 %100.0 %
(1)Amount rounds to less than 0.1% as of June 30, 2025.
(2)Amount rounds to less than 0.1% as of December 31, 2024.
The geographic composition of investments at cost and fair value was as follows:
June 30, 2025
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$11,897,748 $11,768,803 88.8 %187.2 %
Europe1,161,035 1,210,929 9.2 19.2 
Bermuda/Cayman Islands148,911 149,748 1.1 2.4 
Canada119,027 122,667 0.9 2.0 
Asia638 653 0.0 0.0 
Total$13,327,359 $13,252,800 100.0 %210.8 %
December 31, 2024
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$11,663,322 $11,595,231 88.6 %190.8 %
Europe1,138,542 1,104,837 8.4 18.2 
Canada241,124 242,103 1.8 4.0 
Bermuda/Cayman Islands149,595 149,735 1.2 2.5 
Asia636 612 0.0 0.0 
Total$13,193,219 $13,092,518 100.0 %215.5 %
As of June 30, 2025 and December 31, 2024, four borrowers (across five loans) and four borrowers (five loans) in the portfolio were on non-accrual status, respectively.
As of June 30, 2025 and December 31, 2024, on a fair value basis, 99.8% and 99.8%, respectively, of performing debt investments bore interest at a floating rate and 0.2% and 0.2%, respectively, of performing debt investments bore interest at a fixed rate.
v3.25.2
Fair Value Measurements
 6 Months Ended
Jun. 30, 2025
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present the fair value hierarchy of financial instruments:
June 30, 2025
Level 1Level 2Level 3Total
First lien debt$— $214,844 $12,800,357 $13,015,201 
Second lien debt— — 122,942 122,942 
Unsecured debt— — 13,721 13,721 
Equity1,430 — 99,506 100,936 
Total$1,430 $214,844 $13,036,526 $13,252,800 
December 31, 2024
Level 1Level 2Level 3Total
First lien debt$— $115,753 $12,714,636 $12,830,389 
Second lien debt— — 119,184 119,184 
Unsecured debt— — 33,521 33,521 
Equity— — 109,424 109,424 
Total$— $115,753 $12,976,765 $13,092,518 
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.
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 June 30, 2025
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$12,370,969 $118,482 $13,658 $99,163 $12,602,272 
Purchases of investments546,760 2,123 471 9 549,363 
Proceeds from principal repayments and sales of investments(163,314)(662)— (230)(164,206)
Accretion of discount (amortization of premium)10,437 75 11 — 10,523 
Net realized gain (loss)(1,232)— — — (1,232)
Net change in unrealized appreciation (depreciation)36,737 2,924 (419)564 39,806 
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
— — — — — 
Fair value, end of period$12,800,357 $122,942 $13,721 $99,506 $13,036,526 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$37,050 $2,924 $(419)$564 $40,119 
Six Months Ended June 30, 2025
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$12,714,636 $119,184 $33,521 $109,424 $12,976,765 
Purchases of investments1,262,249 3,787 939 177 1,267,152 
Proceeds from principal repayments and sales of investments(1,128,141)(3,010)(20,595)(10,454)(1,162,200)
Accretion of discount (amortization of premium)26,437 149 21 — 26,607 
Net realized gain (loss)(212)(1)— 7,316 7,103 
Net change in unrealized appreciation (depreciation)27,338 2,833 (165)(6,957)23,049 
Transfers into Level 3 (1)
225 — — — 225 
Transfers out of Level 3 (1)
(102,175)— — — (102,175)
Fair value, end of period$12,800,357 $122,942 $13,721 $99,506 $13,036,526 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$30,042 $2,347 $(435)$(2,405)$29,549 
Three Months Ended June 30, 2024
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$10,178,311 $41,515 $11,859 $98,680 $10,330,365 
Purchases of investments906,014 501 413 3 906,931 
Proceeds from principal repayments and sales of investments(87,920)— — — (87,920)
Accretion of discount (amortization of premium)9,227 23 11 — 9,261 
Net realized gain (loss)195 — — — 195 
Net change in unrealized appreciation (depreciation)21,574 (54)(5)(1,067)20,448 
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
(51,434)— — — (51,434)
Fair value, end of period$10,975,967 $41,985 $12,278 $97,616 $11,127,846 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2024 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$21,185 $(54)$(5)$(1,067)$20,059 
Six Months Ended June 30, 2024
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$9,564,203 $41,515 $9,924 $94,940 $9,710,582 
Purchases of investments1,639,580 681 2,198 2,190 1,644,649 
Proceeds from principal repayments and sales of investments(272,398)— — — (272,398)
Accretion of discount (amortization of premium)18,538 48 20 — 18,606 
Net realized gain (loss)623 — — — 623 
Net change in unrealized appreciation (depreciation)26,223 (259)136 486 26,586 
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
(802)— — — (802)
Fair value, end of period$10,975,967 $41,985 $12,278 $97,616 $11,127,846 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2024 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$28,769 $(259)$130 $486 $29,126 
For the three and six months ended June 30, 2025 and 2024, 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.
June 30, 2025
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$12,651,785 Yield AnalysisDiscount Rate4.95 %17.04 %9.79 %
148,457 Asset RecoverabilityMarket Multiple8.12x11.50x8.71x
115 Market QuotationsBroker Quoted Price97.2597.2597.25
12,800,357 
Investments in second lien debt122,942 Yield AnalysisDiscount Rate8.51 %16.62 %11.04 %
Investments in unsecured debt13,721 Yield AnalysisDiscount Rate13.06 %14.51 %14.31 %
Investments in equity59,947 Market ApproachPerformance Multiple6.40x28.50x12.70x
22,592 Yield AnalysisDiscount Rate11.42 %20.96 %13.05 %
14,123 Option Pricing Model Expected Volatility32.00 %70.50 %37.53 %
2,844 Asset RecoverabilityMarket Multiple11.50x11.50x11.50x
99,506 
Total$13,036,526 
December 31, 2024
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$12,546,382 Yield AnalysisDiscount Rate7.00 %22.67 %10.15 %
102,316 Market QuotationsBroker Quoted Price97.00100.57100.08
63,879 Asset RecoverabilityMarket Multiple10.00x10.75x10.40x
2,059 Asset RecoverabilityDiscount Rate10.33 %10.92 %10.36 %
12,714,636 
Investments in second lien debt119,184 Yield AnalysisDiscount Rate8.86 %16.73 %11.52 %
Investments in unsecured debt33,521 Yield AnalysisDiscount Rate7.71%13.94%10.12%
Investments in equity69,633 Market ApproachPerformance Multiple2.30x30.00x10.11x
21,697 Yield AnalysisDiscount Rate9.54 %19.47 %15.55 %
14,499 Option Pricing ModelExpected Volatility23.50 %70.50 %34.03 %
3,166 Asset RecoverabilityMarket Multiple10.00x10.75x10.50x
429 Transaction PriceN/A
109,424 
Total$12,976,765 
(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 June 30, 2025 and December 31, 2024, 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 June 30, 2025 and December 31, 2024.
June 30, 2025December 31, 2024
Fair ValueFair Value
2026 Notes$795,040 $788,880 
New 2026 Notes681,730 672,420 
2027 Notes621,075 608,725 
2028 Notes605,085 590,200 
November 2027 Notes408,560 406,440 
April 2028 Notes705,180 698,460 
June 2030 Notes495,600 — 
2024-1 Notes457,460 457,568 
Total$4,769,730 $4,222,693 
Other
As of June 30, 2025 and December 31, 2024, the carrying amounts of the Company’s other assets and liabilities approximate fair value. These financial instruments, with the exception of cash and cash equivalents (including money market funds classified within Cash and Cash Equivalents in the Condensed Consolidated Statements of Assets and Liabilities) which would be categorized as Level 1, would be categorized as Level 3 within the fair value hierarchy.
v3.25.2
Derivatives
 6 Months Ended
Jun. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivatives Derivatives
The Company enters into derivative financial instruments in the normal course of business to achieve certain risk management objectives, including managing its foreign currency and interest rate risk exposures.
The net fair value of foreign currency and interest rate derivative contracts are included within Derivative assets at fair value or Derivative liabilities at fair value in the Condensed Consolidated Statements of Assets and Liabilities.
The following tables present the aggregate notional amount and fair value hierarchy of the Company’s derivative financial instruments as of June 30, 2025 and December 31, 2024:
June 30, 2025
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $— $— $— $— 
Interest rate swaps— 22,991 — 22,991 1,600,000 
Total Derivative assets at fair value$— $22,991 $— $22,991 $1,600,000 
Derivative Liabilities
Foreign currency forward contracts$— $(2,646)$— $(2,646)$188,193 
Interest rate swaps— — — — — 
Total Derivative liabilities at fair value$— $(2,646)$— $(2,646)$188,193 
Cash collateral posted$11,070 
December 31, 2024
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $2,401 $— $2,401 $171,016 
Interest rate swaps— 3,995 — 3,995 400,000 
Total Derivative assets at fair value$— $6,396 $— $6,396 $571,016 
Derivative Liabilities
Foreign currency forward contracts$— $— $— $— $— 
Interest rate swaps— (7,164)— (7,164)700,000 
Total Derivative liabilities at fair value$— $(7,164)$— $(7,164)$700,000 
Cash collateral posted$4,807 
In the tables above:
•The notional amount represents the absolute value amount of all outstanding derivative contracts.
•All foreign currency derivatives are not designated in hedge relationships.
•All interest rate swaps are designated in fair value hedge relationships.
•The fair value has been presented prior to the application of counterparty netting or cash collateral netting.
The table below presents the impact to the Condensed Consolidated Statements of Operations from derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship for the three and six month periods ended June 30, 2025 and June 30, 2024, respectively. The net change in unrealized gains and losses on the derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship are included within Net change in unrealized appreciation (depreciation) on derivative instruments in the Condensed Consolidated Statements of Operations. The net realized gains and losses on the derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship are included within Net realized gain (loss) on derivative instruments in the Condensed Consolidated Statements of Operations.
For the Three Months Ended June 30,For the Six Months Ended June 30,
2025202420252024
Unrealized appreciation (depreciation)
Foreign currency forward contracts$(3,126)$— $(5,047)$— 
Net change in unrealized appreciation (depreciation)$(3,126)$— $(5,047)$— 
Realized gain (loss)
Foreign currency forward contracts$(7,673)$— $(9,727)$— 
Net realized gain (loss)$(7,673)$— $(9,727)$— 
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 June 30, 2025 and December 31, 2024:
As of June 30, 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.$8,969 $— $— $8,969 $— $— 
Wells Fargo Bank, N.A.14,022 (2,646)— 11,376 — — 
$22,991 $(2,646)$— $20,345 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,770 $1,770 
Wells Fargo Bank, N.A.(2,646)2,646 — — 9,300 9,300 
$(2,646)$2,646 $— $— $11,070 $11,070 
As of December 31, 2024
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.$3,995 $— $— $3,995 $— $— 
Wells Fargo Bank, N.A.2,401 (2,401)— — — — 
$6,396 $(2,401)$— $3,995 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,770 $1,770 
Wells Fargo Bank, N.A.(7,164)2,401 4,763 — 7,800 3,037 
$(7,164)$2,401 $4,763 $— $9,570 $4,807 
(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 and six month periods ended June 30, 2025 and June 30, 2024, 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 June 30,For the Six Months Ended June 30,
2025202420252024
Interest rate swaps$10,369 $2,015 $25,778 $2,015 
Hedged items(10,373)(1,432)(24,658)(1,432)
The table below presents the carrying value of unsecured borrowings as of June 30, 2025 and December 31, 2024 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:
June 30, 2025December 31, 2024
DescriptionCarrying ValueCumulative Hedging AdjustmentsCarrying ValueCumulative Hedging Adjustments
Unsecured notes$1,598,918 $21,762 $1,082,389 $(2,896)
v3.25.2
Borrowings
 6 Months Ended
Jun. 30, 2025
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 June 30, 2025 and December 31, 2024, the Company’s asset coverage was 188.5% and 185.7%, 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 which are collectively referred to as the “SPVs,” and such secured financing facilities described below are collectively referred to as 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 June 30, 2025 and December 31, 2024, 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, and December 19, 2024 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 November 28, 2025. 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 June 30, 2025 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 November 28, 2025 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 June 30, 2025 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 6, 2024, 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 June 30, 2025, a portion of the Revolving Credit Facility consists of (A) funded term loans in the aggregate principal amount of $423.5 million and (B) revolving commitments in the aggregate principal amount of $1.9 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 12, 2028 (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 12, 2029 (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 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 June 30, 2025 and December 31, 2024, the Company was in compliance with all covenants and other requirements of the Revolving Credit Facility.
On August 4, 2025, the Revolving Credit Facility was amended. For further detail on the amendment, see “Note 13. Subsequent Events.”
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 and June 2030 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 June 30, 2025 and December 31, 2024, 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 will mature on January 15, 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 2026 Notes Indenture. The 2026 Notes bear interest at a rate of 3.625% per year payable semi-annually on January 15 and July 15 of each year, commencing on July 15, 2021. The 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 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.
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.
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 $746.8 million term debt securitization (the “2024-1 Debt Securitization”). Term debt securitizations are also known as collateralized loan obligations and are a form of secured financing incurred by the Company, which is consolidated by the Company for financial reporting purposes and subject to its overall asset coverage requirement. The notes offered in the 2024-1 Debt Securitization (collectively, the “2024-1 Notes”) were issued by the 2024-1 Issuer, an indirectly wholly-owned and consolidated (for tax and accounting purposes) subsidiary of the Company, and are primarily secured by a diversified portfolio of private credit loans and participation interests therein.
The following table presents information on the secured notes issued and the secured loans incurred in the 2024-1 Debt Securitization:
June 30, 2025
DescriptionTypePrincipal OutstandingInterest RateCredit Rating
Class A Notes (2)
Senior Secured Floating Rate$— 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.
 June 30, 2025December 31, 2024
ASSETS
Investments at fair value
Non-controlled/non-affiliated investments$752,513 $736,551 
Total investments at fair value
752,513 736,551 
Cash and cash equivalents (restricted cash of $87,065 and $2,499, respectively)
87,065 2,499 
Interest receivable from non-controlled/non-affiliated investments
10,217 8,268 
Total assets$849,795 $747,318 
LIABILITIES
Debt (net of unamortized debt issuance costs of $2,315 and $2,417, respectively)
$455,185 $455,083 
Interest payable
16,920 3,125 
Total liabilities$472,105 $458,208 
The Company’s outstanding debt obligations were as follows:
June 30, 2025
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 $99,874 $99,874 $— $400,126 $400,126 
Breckenridge Funding Facility1,175,000 595,850 595,850 — 579,150 536,336 
Big Sky Funding Facility650,000 343,150 343,150 — 306,850 253,975 
BXSL 2025-1 Facility400,000 — — — 400,000 400,000 
Revolving Credit Facility (4)
2,325,000 1,211,272 1,211,272 — 1,113,728 1,113,728 
2026 Notes800,000 800,000 799,026 974 — — 
New 2026 Notes700,000 700,000 697,857 2,143 — — 
2027 Notes650,000 650,000 645,529 4,471 — — 
2028 Notes650,000 650,000 643,889 6,111 — — 
November 2027 Notes (5)
400,000 400,000 403,545 4,813 — — 
April 2028 Notes (5)
700,000 700,000 698,176 7,450 — — 
June 2030 Notes (5)
500,000 500,000 497,197 10,582 — — 
2024-1 Notes457,500 457,500 455,185 2,315 — — 
Total$9,907,500 $7,107,646 $7,090,550 $38,859 $2,799,854 $2,704,165 
(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 June 30, 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 June 30, 2025, the Company had non-USD borrowings denominated in the following currencies:
•CAD 30.7 million
•EUR 283.9 million
•GBP 258.0 million
•AUD 1.0 million
(5)Carrying value is inclusive of adjustment for the change in fair value of effective hedge relationship.
December 31, 2024
Aggregate Principal CommittedOutstanding PrincipalCarrying ValueUnamortized Debt Issuance Costs
Unused Portion (1)
Amount Available (2)
Jackson Hole Funding Facility (3)
$500,000 $399,874 $399,874 $— $100,126 $100,126 
Breckenridge Funding Facility1,175,000 649,350 649,350 — 525,650 525,650 
Big Sky Funding Facility650,000 400,000 400,000 — 250,000 227,766 
BXSL 2025-1 Facility400,000 — — — 400,000 400,000 
Revolving Credit Facility (4)
2,225,000 1,287,140 1,287,140 — 937,860 937,860 
2026 Notes800,000 800,000 798,145 1,855 — — 
New 2026 Notes700,000 700,000 696,980 3,020 — — 
2027 Notes650,000 650,000 644,167 5,833 — — 
2028 Notes650,000 650,000 642,963 7,037 — — 
November 2027 Notes (5)
400,000 400,000 397,898 5,818 — — 
April 2028 Notes (5)
700,000 700,000 684,491 8,897 — — 
2024-1 Notes457,500 457,500 455,083 2,417 — — 
Total$9,307,500 $7,093,864 $7,056,091 $34,877 $2,213,636 $2,191,402 
(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, 2024, 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, 2024, the Company had non-USD borrowings denominated in the following currencies:
•CAD 38.2 million
•EUR 277.7 million
•GBP 266.3 million
•AUD 1.0 million
(5)Carrying value is inclusive of adjustment for the change in fair value of effective hedge relationship.
As of June 30, 2025 and December 31, 2024, $64.9 million and $53.4 million, respectively, of interest expense and $0.3 million and $0.6 million, respectively, of unused commitment fees were included in interest payable.
For the three and six months ended June 30, 2025, the weighted average interest rate (including unused fees, accretion of net discounts on unsecured debt and the impact of the application of hedge accounting) on all borrowings outstanding was 5.03% and 5.02%, respectively. For the three and six months ended June 30, 2024, the weighted average interest rate (including unused fees, accretion of net discounts on unsecured debt and the impact of the application of hedge accounting) on all borrowings outstanding was 5.26% and 5.18%, respectively.
For the three and six months ended June 30, 2025, the weighted average all-in cost of debt (including unused fees, accretion of net discounts on unsecured debt, amortization of deferred financing costs, and the impact of the application of hedge accounting) was 5.10% and 5.09%, respectively. For the three and six months ended June 30, 2024, the weighted average all-in cost of debt (including unused fees, accretion of net discounts on unsecured debt, amortization of deferred financing costs, and the impact of the application of hedge accounting) was 5.38% and 5.31%, respectively.
For the three and six months ended June 30, 2025, the average principal debt outstanding was $7,155.4 million and $7,234.0 million, respectively. For the three and six months ended June 30, 2024, the average principal debt outstanding was $5,798.8 million and $5,422.5 million, respectively.
The components of interest expense were as follows:
Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
Borrowing interest expense$84,569 $74,511 $172,209 $135,676 
Facility unused fees2,538 927 4,239 2,743 
Amortization of deferred financing costs1,440 1,705 2,850 3,403 
Amortization of original issue discount and debt issuance costs (including premiums and discounts)3,734 2,281 7,085 4,321 
Gain (loss) from interest rate swaps accounted for as hedges and the related hedged items:
Interest rate swaps(10,369)(2,015)(25,778)(2,015)
Hedged items10,373 1,432 24,658 1,432 
Total Interest Expense$92,285 $78,841 $185,263 $145,560 
Cash paid for interest expense$68,885 $61,034 $165,186 $133,658 
v3.25.2
Commitment and Contingencies
 6 Months Ended
Jun. 30, 2025
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 June 30, 2025 and December 31, 2024, the Company had unfunded commitments, including delayed draw term loans and revolvers, with an aggregate amount of $1.9 billion and $1.7 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 June 30, 2025 and December 31, 2024, the Company estimates that $175.7 million and $162.3 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 June 30, 2025 and December 31, 2024, management is not aware of any material pending legal proceedings.
v3.25.2
Net Assets
 6 Months Ended
Jun. 30, 2025
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 June 30, 2025, 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 June 30, 2025, Common Shares with an aggregate sales price of $439.5 million remained available for issuance under the Equity Distribution Agreements.
The following table summarizes the total Common Shares issued and proceeds received, for the three months ended June 30, 2025, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering2,045,455 $64,205 $193 $64,012 $31.29 
(1)The Company received $5.4 million of proceeds subsequent to June 30, 2025 on July 1, 2025. The amount was recorded as Receivable for shares sold in the Consolidated Statement of Assets and Liabilities.
(2)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
The following table summarizes the total Common Shares issued and proceeds received, for the six months ended June 30, 2025, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering7,807,103 $250,902 $2,060 $248,842 $31.87 
(1)The Company received $5.4 million of proceeds subsequent to June 30, 2025 on July 1, 2025. The amount was recorded as Receivable for shares sold in the Consolidated Statement of Assets and Liabilities.
(2)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
The following table summarizes the total Common Shares issued and proceeds received, for the three months ended June 30, 2024, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering6,333,768 $190,966 $831 $190,135 $30.02 
(1)The Company received $1.9 million of proceeds subsequent to June 30, 2024 on July 1, 2024. The amount was recorded as Receivable for shares sold in the Condensed Consolidated Statement of Assets and Liabilities.
(2)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
The following table summarizes the total Common Shares issued and proceeds received, for the six months ended June 30, 2024, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering12,219,314 $353,693 $1,535 $352,158 $28.82 
(1)The Company received $1.9 million of proceeds subsequent to June 30, 2024 on July 1, 2024. The amount was recorded as Receivable for shares sold in the Condensed Consolidated Statement of Assets and Liabilities.
(2)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 six months ended June 30, 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 
May 7, 2025June 30, 2025July 25, 20250.7700 177,007 
Total distributions$1.5400 $352,428 
The following table summarizes the Company’s distributions declared and payable for the six months ended June 30, 2024 (dollars in thousands except per share amounts):
Date DeclaredRecord DatePayment DatePer Share AmountTotal Amount
February 28, 2024March 31, 2024April 26, 2024$0.7700 $147,743 
May 8, 2024June 30, 2024July 26, 20240.7700 152,706 
Total distributions$1.5400 $300,449 
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 and the Company 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 six months ended June 30, 2025 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 24, 2025$5,130 165,096 
April 25, 20255,380 191,060 
Total distributions$10,510 356,156 
The following table summarizes the amounts and shares issued to shareholders who have not opted out of the DRIP during the six months ended June 30, 2024 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 26, 2024$5,614 206,465 
April 26, 20245,293 173,614 
Total distributions$10,907 380,079 
Share Repurchase Plan
In February 2023, the Board approved a share repurchase plan, under which the Company was 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 10b-18 Plan was not renewed and terminated by its terms on February 22, 2024. For the three and six months ended June 30, 2024, the Company did not repurchase any of its shares under the 10b-18 Plan.
v3.25.2
Earnings Per Share
 6 Months Ended
Jun. 30, 2025
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 June 30,Six Months Ended June 30,
2025202420252024
Net increase (decrease) in net assets resulting from operations$155,042 $196,186 $304,851 $379,941 
Weighted average shares outstanding (basic and diluted)228,192,335 193,908,352 227,389,213 192,254,100 
Earnings (loss) per common share (basic and diluted)$0.68 $1.01 $1.34 $1.98 
v3.25.2
Financial Highlights and Senior Securities
 6 Months Ended
Jun. 30, 2025
Investment Company [Abstract]  
Financial Highlights and Senior Securities Financial Highlights and Senior Securities
The following are the financial highlights for the six months ended June 30, 2025 and 2024:
Six Months Ended June 30,
 20252024
Per Share Data (1):
Net asset value, beginning of period$27.39 $26.66 
Net investment income
1.60 1.76 
Net change in unrealized and realized gain (loss)
(0.26)0.21 
Net increase (decrease) in net assets resulting from operations1.34 1.97 
Distributions from net investment income (2)
(1.54)(1.54)
Net increase (decrease) in net assets from capital share transactions0.14 0.10 
Total increase (decrease) in net assets(0.06)0.53 
Net asset value, end of period$27.33 $27.19 
Market value, end of period
$30.75 $30.62 
Shares outstanding, end of period230,055,444 198,381,800 
Total return based on NAV (3)
5.1 %7.3 %
Total return based on market value (4)
0.2 %16.8 %
Ratios:
Ratio of net expenses to average net assets (5)
10.6 %11.1 %
Ratio of net investment income to average net assets (5)
11.7 %12.9 %
Portfolio turnover rate8.9 %2.6 %
Supplemental Data:
Net assets, end of period$6,288,296$5,394,573
Asset coverage ratio188.5 %188.3 %
(1)The per share data was derived by using the weighted average shares outstanding during the period.
(2)The per share data for distributions was derived by using the actual shares outstanding at the date of the relevant transactions (refer to Note 9).
(3)Total return is calculated as the change in NAV per share during the period, plus distributions per share (assuming dividends and distributions are reinvested in accordance with the DRIP) divided by the beginning NAV per share. Total return does not include sales load.
(4)Total return based on market value is calculated as the change in market value per share during the respective periods, taking into account distributions, if any, reinvested in accordance with the DRIP.
(5)Amounts are annualized except for amounts relating to excise tax expense. For the six months ended June 30, 2025 and 2024, the ratio of total operating expenses to average net assets was 10.6% and 11.1%.
The following is information about the Company’s senior securities as of the dates indicated in the table below:
Class and Period
Total Amount Outstanding Exclusive of Treasury Securities (1)
Asset Coverage per Unit (2)
Involuntary Liquidating Preference per Unit (3)
Average Market Value per Unit (4)
Subscription Facility
June 30, 2025$— $— —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
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)
Jackson Hole Funding Facility
June 30, 2025$99,874 $1,885 —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
June 30, 2025595,850 1,885 —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
June 30, 2025343,150 1,885 —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
BXSL 2025-1 Facility
June 30, 2025— 1,885 —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
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)
Revolving Credit Facility
June 30, 2025$1,211,272 $1,885 —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
June 30, 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
June 30, 2025800,000 1,885 —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
New 2026 Notes
June 30, 2025700,000 1,885 —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
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)
2027 Notes
June 30, 2025$650,000 $1,885 —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
June 30, 2025650,000 1,885 —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
June 30, 2025400,000 1,885 —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
April 2028 Notes
June 30, 2025700,000 1,885 —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
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)
June 2030 Notes
June 30, 2025$500,000 $1,885 —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
2024-1 Notes
June 30, 2025457,500 1,885 —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.
v3.25.2
Segment Reporting
 6 Months Ended
Jun. 30, 2025
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 Statement 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 Statement of Operations.
v3.25.2
Subsequent Events
 6 Months Ended
Jun. 30, 2025
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 June 30, 2025, except as discussed below.
On August 6, 2025, the Board declared a distribution of $0.77 per share to shareholders of record as of September 30, 2025, which is payable on or about October 24, 2025.
Revolving Credit Facility Amendment
On August 4, 2025, the Company entered into an amendment (the “Revolver Amendment”) to the Revolving Credit Facility, among the Company, as borrower, each of the lenders from time to time party thereto and Citibank, N.A., as administrative agent. The Revolver Amendment provides for, among other things, (a) increasing the aggregate committed principal from $2.3 billion to $2.4 billion, which is comprised of (i) revolving commitments in an aggregate amount of $2.0 billion and (ii) funded term loans in an aggregate principal amount of $433.5 million, (b) an extension of the period during which the Company may make borrowings on the Revolving Credit Facility from August 12, 2028 to 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), (c) an extension of the scheduled maturity date of the Revolving Credit Facility from August 12, 2029 to August 4, 2030 (other than with respect to the revolving commitments of certain lenders in the amount of $200.0 million, which mature on June 28, 2027), (d) resetting the minimum shareholders’ equity test, (e) removing the Term SOFR Adjustment with respect to the 2030 Loans (as defined in the Credit Agreement) and (f) removing provisions related to sustainability targets.
v3.25.2
Insider Trading Arrangements
 3 Months Ended
Jun. 30, 2025
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
v3.25.2
N-2 - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 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, Address Line Two 31st Floor                
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
June 30, 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
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)
Jackson Hole Funding Facility
June 30, 2025$99,874 $1,885 —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
June 30, 2025595,850 1,885 —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
June 30, 2025343,150 1,885 —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
BXSL 2025-1 Facility
June 30, 2025— 1,885 —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
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)
Revolving Credit Facility
June 30, 2025$1,211,272 $1,885 —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
June 30, 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
June 30, 2025800,000 1,885 —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
New 2026 Notes
June 30, 2025700,000 1,885 —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
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)
2027 Notes
June 30, 2025$650,000 $1,885 —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
June 30, 2025650,000 1,885 —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
June 30, 2025400,000 1,885 —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
April 2028 Notes
June 30, 2025700,000 1,885 —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
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)
June 2030 Notes
June 30, 2025$500,000 $1,885 —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
2024-1 Notes
June 30, 2025457,500 1,885 —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 shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that is effective for a term of three years and expired in July 2025. 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 June 30, 2025 and December 31, 2024, 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 June 30, 2025 and December 31, 2024, we had an aggregate amount of $7.1 billion and $7.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 188.5% and 185.7%, 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 are 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 as of June 30, 2025, taken together with our $2.8 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.7 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 $216.3 million of Level 1 and Level 2 investments as of June 30, 2025.
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 June 30, 2025, we had $273.7 million in cash and cash equivalents. During the six months ended June 30, 2025, cash provided by operating activities was $203.6 million, primarily due to an increase in net assets from operations of $304.9 million and principal repayments and sales of investments of $1,163.4 million partially offset by purchases of investments of $1,219.7 million. Cash used in financing activities was $161.7 million during the period, which was primarily as a result of net repayments on debt of $71.1 million and dividends paid in cash of $335.7 million partially offset by $247.9 million of proceeds from the issuance of our Common Shares.
                
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 shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that is effective for a term of three years and expired in July 2025. 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 June 30, 2025 and December 31, 2024, 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 June 30, 2025 and December 31, 2024, we had an aggregate amount of $7.1 billion and $7.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 188.5% and 185.7%, 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 are 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 as of June 30, 2025, taken together with our $2.8 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.7 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 $216.3 million of Level 1 and Level 2 investments as of June 30, 2025.
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 June 30, 2025, we had $273.7 million in cash and cash equivalents. During the six months ended June 30, 2025, cash provided by operating activities was $203.6 million, primarily due to an increase in net assets from operations of $304.9 million and principal repayments and sales of investments of $1,163.4 million partially offset by purchases of investments of $1,219.7 million. Cash used in financing activities was $161.7 million during the period, which was primarily as a result of net repayments on debt of $71.1 million and dividends paid in cash of $335.7 million partially offset by $247.9 million of proceeds from the issuance of our Common Shares.
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, 2024.
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 shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that is effective for a term of three years and expired in July 2025. 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 June 30, 2025 and December 31, 2024, 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 June 30, 2025 and December 31, 2024, we had an aggregate amount of $7.1 billion and $7.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 188.5% and 185.7%, 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 are 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 as of June 30, 2025, taken together with our $2.8 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.7 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 $216.3 million of Level 1 and Level 2 investments as of June 30, 2025.
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 June 30, 2025, we had $273.7 million in cash and cash equivalents. During the six months ended June 30, 2025, cash provided by operating activities was $203.6 million, primarily due to an increase in net assets from operations of $304.9 million and principal repayments and sales of investments of $1,163.4 million partially offset by purchases of investments of $1,219.7 million. Cash used in financing activities was $161.7 million during the period, which was primarily as a result of net repayments on debt of $71.1 million and dividends paid in cash of $335.7 million partially offset by $247.9 million of proceeds from the issuance of our Common Shares.
                
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 shares.
To facilitate public issuances of debt or equity securities, in July 2022, we filed a shelf registration statement with the SEC that is effective for a term of three years and expired in July 2025. 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 June 30, 2025 and December 31, 2024, 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 June 30, 2025 and December 31, 2024, we had an aggregate amount of $7.1 billion and $7.1 billion of senior securities outstanding, respectively, and our asset coverage ratio was 188.5% and 185.7%, 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 are 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 as of June 30, 2025, taken together with our $2.8 billion of unused capacity under our credit facilities (subject to borrowing base availability, $2.7 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 $216.3 million of Level 1 and Level 2 investments as of June 30, 2025.
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 June 30, 2025, we had $273.7 million in cash and cash equivalents. During the six months ended June 30, 2025, cash provided by operating activities was $203.6 million, primarily due to an increase in net assets from operations of $304.9 million and principal repayments and sales of investments of $1,163.4 million partially offset by purchases of investments of $1,219.7 million. Cash used in financing activities was $161.7 million during the period, which was primarily as a result of net repayments on debt of $71.1 million and dividends paid in cash of $335.7 million partially offset by $247.9 million of proceeds from the issuance of our Common Shares.
                
NAV Per Share $ 27.33 $ 27.39 $ 27.19 $ 26.66          
Subscription Facility [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 0 $ 0   $ 0 $ 0 $ 0 $ 0 $ 119,752 $ 0
Senior Securities Coverage per Unit $ 0 $ 0   $ 0 $ 0 $ 0 $ 0 $ 2,151 $ 0
Jackson Hole Funding Facility [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 99,874 $ 399,874   $ 233,019 $ 360,019 $ 361,007 $ 362,316 $ 514,151 $ 120,000
Senior Securities Coverage per Unit $ 1,885 $ 1,857   $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 2,151 $ 2,278
Breckenridge Funding Facility [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 595,850 $ 649,350   $ 741,700 $ 825,000 $ 568,680 $ 569,000 $ 820,311 $ 65,000
Senior Securities Coverage per Unit $ 1,885 $ 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 $ 343,150 $ 400,000   $ 480,906 $ 499,606 $ 499,606 $ 200,346 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 1,857   $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 0 $ 0
BXSL 2025-1 Facility [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 0 $ 0   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 1,857   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Revolving Credit Facility [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 1,211,272 $ 1,287,140   $ 682,258 $ 678,378 $ 915,035 $ 182,901 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 1,857   $ 2,003 $ 1,748 $ 1,802 $ 2,300 $ 0 $ 0
2023 Notes [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 0 $ 0   $ 0 $ 400,000 $ 400,000 $ 400,000 $ 0 $ 0
Senior Securities Coverage per Unit $ 0 $ 0   $ 0 $ 1,748 $ 1,802 $ 2,300 $ 0 $ 0
2026 Notes [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 800,000 $ 800,000   $ 800,000 $ 800,000 $ 800,000 $ 800,000 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 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 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 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 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 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 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 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   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 1,857   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
April 2028 Notes [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 700,000 $ 700,000   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 1,857   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
June 2030 Notes [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 500,000 $ 0   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 0   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
2024-1 Notes [Member]                  
Financial Highlights [Abstract]                  
Senior Securities Amount $ 457,500 $ 457,500   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Senior Securities Coverage per Unit $ 1,885 $ 1,857   $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
v3.25.2
Significant Accounting Policies (Policies)
 6 Months Ended
Jun. 30, 2025
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, 2025.
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 June 30, 2025, 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.
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 and year 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 and six months ended June 30, 2025, the Company recorded $1.7 million and $14.6 million, respectively, in non-recurring interest income (e.g., prepayment premiums, accelerated accretion of upfront loan origination fees and unamortized discounts). For the three and six months ended June 30, 2024, the Company recorded $0.4 million and $2.3 million, respectively, in non-recurring interest income.
PIK Income
The Company has loans 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.
Fee 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 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 status 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 June 30, 2025. 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 and six months ended June 30, 2025, the Company incurred $3.8 million and $8.0 million, respectively, of U.S. federal excise tax. For the three and six months ended June 30, 2024, the Company incurred $3.4 million and $6.8 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 2023, the FASB issued ASU 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” (“ASU 2023-09”). ASU 2023-09 requires additional disaggregated disclosures on the entity’s effective tax rate reconciliation and additional details on income taxes paid. ASU 2023-09 is effective on a prospective basis, with the option for retrospective application, for annual periods beginning after December 15, 2024 and early adoption is permitted. The Company does not expect the adoption of ASU 2023-09 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.
v3.25.2
Investments (Tables)
 6 Months Ended
Jun. 30, 2025
Schedule of Investments [Abstract]  
Schedule of Investments
The composition of the Company’s investment portfolio at cost and fair value was as follows:
June 30, 2025December 31, 2024
CostFair Value% of Total
Investments at
Fair Value		CostFair Value% of Total
Investments at
Fair Value
First lien debt$13,113,676 $13,015,201 98.2 %$12,959,332 $12,830,389 98.0 %
Second lien debt123,559 122,942 0.9 122,634 119,184 0.9 
Unsecured debt14,009 13,721 0.1 33,644 33,521 0.3 
Equity76,115 100,936 0.8 77,609 109,424 0.8 
Total$13,327,359 $13,252,800 100.0 %$13,193,219 $13,092,518 100.0 %
The industry composition of investments at fair value was as follows:
June 30, 2025December 31, 2024
Aerospace & Defense4.4 %4.4 %
Air Freight & Logistics2.1 3.0 
Auto Components (1)(2)
0.0 0.0 
Biotechnology0.1 — 
Building Products2.3 2.4 
Chemicals0.3 0.3 
Commercial Services & Supplies8.2 7.7 
Construction & Engineering0.8 0.8 
Consumer Staples Distribution & Retail (1)
0.0 — 
Containers & Packaging0.2 0.2 
Distributors3.0 3.1 
Diversified Consumer Services4.3 4.6 
Diversified Telecommunication Services1.0 1.0 
Electric Utilities1.0 1.1 
Electrical Equipment0.8 0.8 
Electronic Equipment, Instruments & Components2.0 1.9 
Energy Equipment & Services0.2 0.2 
Financial Services0.5 0.3 
Ground Transportation0.1 0.2 
Health Care Equipment & Supplies0.4 0.7 
Health Care Providers & Services9.6 9.2 
Health Care Technology5.2 5.0 
Insurance8.2 7.4 
Interactive Media & Services0.4 0.5 
Internet & Direct Marketing Retail— 2.4 
IT Services5.4 4.4 
Life Sciences Tools & Services0.9 0.6 
Machinery0.3 0.2 
Marine0.5 0.4 
Media0.6 0.4 
June 30, 2025December 31, 2024
Oil, Gas & Consumable Fuels0.6 %0.6 %
Paper & Forest Products
0.1 0.1 
Pharmaceuticals0.3 0.2 
Professional Services8.8 8.4 
Real Estate Management & Development1.2 1.1 
Software20.3 20.1 
Specialty Retail1.4 1.3 
Technology Hardware, Storage & Peripherals0.6 0.6 
Trading Companies & Distributors0.9 1.0 
Transportation Infrastructure2.8 3.4 
Wireless Telecommunication Services0.2 — 
Total100.0 %100.0 %
(1)Amount rounds to less than 0.1% as of June 30, 2025.
(2)Amount rounds to less than 0.1% as of December 31, 2024.
The geographic composition of investments at cost and fair value was as follows:
June 30, 2025
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$11,897,748 $11,768,803 88.8 %187.2 %
Europe1,161,035 1,210,929 9.2 19.2 
Bermuda/Cayman Islands148,911 149,748 1.1 2.4 
Canada119,027 122,667 0.9 2.0 
Asia638 653 0.0 0.0 
Total$13,327,359 $13,252,800 100.0 %210.8 %
December 31, 2024
CostFair Value% of Total Investments at Fair ValueFair Value as % of Net Assets
United States$11,663,322 $11,595,231 88.6 %190.8 %
Europe1,138,542 1,104,837 8.4 18.2 
Canada241,124 242,103 1.8 4.0 
Bermuda/Cayman Islands149,595 149,735 1.2 2.5 
Asia636 612 0.0 0.0 
Total$13,193,219 $13,092,518 100.0 %215.5 %
v3.25.2
Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2025
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring Basis
The following tables present the fair value hierarchy of financial instruments:
June 30, 2025
Level 1Level 2Level 3Total
First lien debt$— $214,844 $12,800,357 $13,015,201 
Second lien debt— — 122,942 122,942 
Unsecured debt— — 13,721 13,721 
Equity1,430 — 99,506 100,936 
Total$1,430 $214,844 $13,036,526 $13,252,800 
December 31, 2024
Level 1Level 2Level 3Total
First lien debt$— $115,753 $12,714,636 $12,830,389 
Second lien debt— — 119,184 119,184 
Unsecured debt— — 33,521 33,521 
Equity— — 109,424 109,424 
Total$— $115,753 $12,976,765 $13,092,518 
Summary 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 June 30, 2025
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$12,370,969 $118,482 $13,658 $99,163 $12,602,272 
Purchases of investments546,760 2,123 471 9 549,363 
Proceeds from principal repayments and sales of investments(163,314)(662)— (230)(164,206)
Accretion of discount (amortization of premium)10,437 75 11 — 10,523 
Net realized gain (loss)(1,232)— — — (1,232)
Net change in unrealized appreciation (depreciation)36,737 2,924 (419)564 39,806 
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
— — — — — 
Fair value, end of period$12,800,357 $122,942 $13,721 $99,506 $13,036,526 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$37,050 $2,924 $(419)$564 $40,119 
Six Months Ended June 30, 2025
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$12,714,636 $119,184 $33,521 $109,424 $12,976,765 
Purchases of investments1,262,249 3,787 939 177 1,267,152 
Proceeds from principal repayments and sales of investments(1,128,141)(3,010)(20,595)(10,454)(1,162,200)
Accretion of discount (amortization of premium)26,437 149 21 — 26,607 
Net realized gain (loss)(212)(1)— 7,316 7,103 
Net change in unrealized appreciation (depreciation)27,338 2,833 (165)(6,957)23,049 
Transfers into Level 3 (1)
225 — — — 225 
Transfers out of Level 3 (1)
(102,175)— — — (102,175)
Fair value, end of period$12,800,357 $122,942 $13,721 $99,506 $13,036,526 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$30,042 $2,347 $(435)$(2,405)$29,549 
Three Months Ended June 30, 2024
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$10,178,311 $41,515 $11,859 $98,680 $10,330,365 
Purchases of investments906,014 501 413 3 906,931 
Proceeds from principal repayments and sales of investments(87,920)— — — (87,920)
Accretion of discount (amortization of premium)9,227 23 11 — 9,261 
Net realized gain (loss)195 — — — 195 
Net change in unrealized appreciation (depreciation)21,574 (54)(5)(1,067)20,448 
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
(51,434)— — — (51,434)
Fair value, end of period$10,975,967 $41,985 $12,278 $97,616 $11,127,846 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2024 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$21,185 $(54)$(5)$(1,067)$20,059 
Six Months Ended June 30, 2024
First Lien DebtSecond Lien DebtUnsecured DebtEquityTotal Investments
Fair value, beginning of period$9,564,203 $41,515 $9,924 $94,940 $9,710,582 
Purchases of investments1,639,580 681 2,198 2,190 1,644,649 
Proceeds from principal repayments and sales of investments(272,398)— — — (272,398)
Accretion of discount (amortization of premium)18,538 48 20 — 18,606 
Net realized gain (loss)623 — — — 623 
Net change in unrealized appreciation (depreciation)26,223 (259)136 486 26,586 
Transfers into Level 3 (1)
— — — — — 
Transfers out of Level 3 (1)
(802)— — — (802)
Fair value, end of period$10,975,967 $41,985 $12,278 $97,616 $11,127,846 
Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of June 30, 2024 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations
$28,769 $(259)$130 $486 $29,126 
For the three and six months ended June 30, 2025 and 2024, transfers into or out of Level 3 were primarily due to decreased or increased price transparency.
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.
June 30, 2025
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$12,651,785 Yield AnalysisDiscount Rate4.95 %17.04 %9.79 %
148,457 Asset RecoverabilityMarket Multiple8.12x11.50x8.71x
115 Market QuotationsBroker Quoted Price97.2597.2597.25
12,800,357 
Investments in second lien debt122,942 Yield AnalysisDiscount Rate8.51 %16.62 %11.04 %
Investments in unsecured debt13,721 Yield AnalysisDiscount Rate13.06 %14.51 %14.31 %
Investments in equity59,947 Market ApproachPerformance Multiple6.40x28.50x12.70x
22,592 Yield AnalysisDiscount Rate11.42 %20.96 %13.05 %
14,123 Option Pricing Model Expected Volatility32.00 %70.50 %37.53 %
2,844 Asset RecoverabilityMarket Multiple11.50x11.50x11.50x
99,506 
Total$13,036,526 
December 31, 2024
Range
Fair ValueValuation TechniqueUnobservable InputLowHigh
Weighted Average (1)
Investments in first lien debt$12,546,382 Yield AnalysisDiscount Rate7.00 %22.67 %10.15 %
102,316 Market QuotationsBroker Quoted Price97.00100.57100.08
63,879 Asset RecoverabilityMarket Multiple10.00x10.75x10.40x
2,059 Asset RecoverabilityDiscount Rate10.33 %10.92 %10.36 %
12,714,636 
Investments in second lien debt119,184 Yield AnalysisDiscount Rate8.86 %16.73 %11.52 %
Investments in unsecured debt33,521 Yield AnalysisDiscount Rate7.71%13.94%10.12%
Investments in equity69,633 Market ApproachPerformance Multiple2.30x30.00x10.11x
21,697 Yield AnalysisDiscount Rate9.54 %19.47 %15.55 %
14,499 Option Pricing ModelExpected Volatility23.50 %70.50 %34.03 %
3,166 Asset RecoverabilityMarket Multiple10.00x10.75x10.50x
429 Transaction PriceN/A
109,424 
Total$12,976,765 
(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 June 30, 2025 and December 31, 2024.
June 30, 2025December 31, 2024
Fair ValueFair Value
2026 Notes$795,040 $788,880 
New 2026 Notes681,730 672,420 
2027 Notes621,075 608,725 
2028 Notes605,085 590,200 
November 2027 Notes408,560 406,440 
April 2028 Notes705,180 698,460 
June 2030 Notes495,600 — 
2024-1 Notes457,460 457,568 
Total$4,769,730 $4,222,693 
v3.25.2
Derivatives (Tables)
 6 Months Ended
Jun. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments
The following tables present the aggregate notional amount and fair value hierarchy of the Company’s derivative financial instruments as of June 30, 2025 and December 31, 2024:
June 30, 2025
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $— $— $— $— 
Interest rate swaps— 22,991 — 22,991 1,600,000 
Total Derivative assets at fair value$— $22,991 $— $22,991 $1,600,000 
Derivative Liabilities
Foreign currency forward contracts$— $(2,646)$— $(2,646)$188,193 
Interest rate swaps— — — — — 
Total Derivative liabilities at fair value$— $(2,646)$— $(2,646)$188,193 
Cash collateral posted$11,070 
December 31, 2024
Level 1Level 2Level 3Total Fair ValueNotional
Derivative Assets
Foreign currency forward contracts$— $2,401 $— $2,401 $171,016 
Interest rate swaps— 3,995 — 3,995 400,000 
Total Derivative assets at fair value$— $6,396 $— $6,396 $571,016 
Derivative Liabilities
Foreign currency forward contracts$— $— $— $— $— 
Interest rate swaps— (7,164)— (7,164)700,000 
Total Derivative liabilities at fair value$— $(7,164)$— $(7,164)$700,000 
Cash collateral posted$4,807 
The net realized gains and losses on the derivative assets and derivative liabilities not designated in a qualifying hedge accounting relationship are included within Net realized gain (loss) on derivative instruments in the Condensed Consolidated Statements of Operations.
For the Three Months Ended June 30,For the Six Months Ended June 30,
2025202420252024
Unrealized appreciation (depreciation)
Foreign currency forward contracts$(3,126)$— $(5,047)$— 
Net change in unrealized appreciation (depreciation)$(3,126)$— $(5,047)$— 
Realized gain (loss)
Foreign currency forward contracts$(7,673)$— $(9,727)$— 
Net realized gain (loss)$(7,673)$— $(9,727)$— 
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 June 30,For the Six Months Ended June 30,
2025202420252024
Interest rate swaps$10,369 $2,015 $25,778 $2,015 
Hedged items(10,373)(1,432)(24,658)(1,432)
The table below presents the carrying value of unsecured borrowings as of June 30, 2025 and December 31, 2024 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:
June 30, 2025December 31, 2024
DescriptionCarrying ValueCumulative Hedging AdjustmentsCarrying ValueCumulative Hedging Adjustments
Unsecured notes$1,598,918 $21,762 $1,082,389 $(2,896)
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 June 30, 2025 and December 31, 2024:
As of June 30, 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.$8,969 $— $— $8,969 $— $— 
Wells Fargo Bank, N.A.14,022 (2,646)— 11,376 — — 
$22,991 $(2,646)$— $20,345 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,770 $1,770 
Wells Fargo Bank, N.A.(2,646)2,646 — — 9,300 9,300 
$(2,646)$2,646 $— $— $11,070 $11,070 
As of December 31, 2024
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.$3,995 $— $— $3,995 $— $— 
Wells Fargo Bank, N.A.2,401 (2,401)— — — — 
$6,396 $(2,401)$— $3,995 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,770 $1,770 
Wells Fargo Bank, N.A.(7,164)2,401 4,763 — 7,800 3,037 
$(7,164)$2,401 $4,763 $— $9,570 $4,807 
(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.
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 June 30, 2025 and December 31, 2024:
As of June 30, 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.$8,969 $— $— $8,969 $— $— 
Wells Fargo Bank, N.A.14,022 (2,646)— 11,376 — — 
$22,991 $(2,646)$— $20,345 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,770 $1,770 
Wells Fargo Bank, N.A.(2,646)2,646 — — 9,300 9,300 
$(2,646)$2,646 $— $— $11,070 $11,070 
As of December 31, 2024
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.$3,995 $— $— $3,995 $— $— 
Wells Fargo Bank, N.A.2,401 (2,401)— — — — 
$6,396 $(2,401)$— $3,995 $— $— 
CounterpartyDerivative Liabilities Subject to Master Netting AgreementDerivatives Available for OffsetCash Collateral OffsetNet Amount Derivative Liabilities
Cash Collateral Posted (1)
Cash Collateral Posted Not Offset (2)
SMBC Capital Markets, Inc.$— $— $— $— $1,770 $1,770 
Wells Fargo Bank, N.A.(7,164)2,401 4,763 — 7,800 3,037 
$(7,164)$2,401 $4,763 $— $9,570 $4,807 
(1)No non-cash collateral has been posted to or received from counterparties related to derivative assets or derivative liabilities.
(2)Cash collateral posted to or received from counterparties has been offset against the derivative position with those counterparties to the extent an amount is available to be offset. Cash collateral posted to or received from counterparties in excess of the net derivative positions and not offset is recorded in the Condensed Consolidated Statements of Assets and Liabilities as Receivable from Broker or Payable to Broker, respectively.
v3.25.2
Borrowings (Tables)
 6 Months Ended
Jun. 30, 2025
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Instruments
The following table presents information on the secured notes issued and the secured loans incurred in the 2024-1 Debt Securitization:
June 30, 2025
DescriptionTypePrincipal OutstandingInterest RateCredit Rating
Class A Notes (2)
Senior Secured Floating Rate$— 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:
June 30, 2025
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 $99,874 $99,874 $— $400,126 $400,126 
Breckenridge Funding Facility1,175,000 595,850 595,850 — 579,150 536,336 
Big Sky Funding Facility650,000 343,150 343,150 — 306,850 253,975 
BXSL 2025-1 Facility400,000 — — — 400,000 400,000 
Revolving Credit Facility (4)
2,325,000 1,211,272 1,211,272 — 1,113,728 1,113,728 
2026 Notes800,000 800,000 799,026 974 — — 
New 2026 Notes700,000 700,000 697,857 2,143 — — 
2027 Notes650,000 650,000 645,529 4,471 — — 
2028 Notes650,000 650,000 643,889 6,111 — — 
November 2027 Notes (5)
400,000 400,000 403,545 4,813 — — 
April 2028 Notes (5)
700,000 700,000 698,176 7,450 — — 
June 2030 Notes (5)
500,000 500,000 497,197 10,582 — — 
2024-1 Notes457,500 457,500 455,185 2,315 — — 
Total$9,907,500 $7,107,646 $7,090,550 $38,859 $2,799,854 $2,704,165 
(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 June 30, 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 June 30, 2025, the Company had non-USD borrowings denominated in the following currencies:
•CAD 30.7 million
•EUR 283.9 million
•GBP 258.0 million
•AUD 1.0 million
(5)Carrying value is inclusive of adjustment for the change in fair value of effective hedge relationship.
December 31, 2024
Aggregate Principal CommittedOutstanding PrincipalCarrying ValueUnamortized Debt Issuance Costs
Unused Portion (1)
Amount Available (2)
Jackson Hole Funding Facility (3)
$500,000 $399,874 $399,874 $— $100,126 $100,126 
Breckenridge Funding Facility1,175,000 649,350 649,350 — 525,650 525,650 
Big Sky Funding Facility650,000 400,000 400,000 — 250,000 227,766 
BXSL 2025-1 Facility400,000 — — — 400,000 400,000 
Revolving Credit Facility (4)
2,225,000 1,287,140 1,287,140 — 937,860 937,860 
2026 Notes800,000 800,000 798,145 1,855 — — 
New 2026 Notes700,000 700,000 696,980 3,020 — — 
2027 Notes650,000 650,000 644,167 5,833 — — 
2028 Notes650,000 650,000 642,963 7,037 — — 
November 2027 Notes (5)
400,000 400,000 397,898 5,818 — — 
April 2028 Notes (5)
700,000 700,000 684,491 8,897 — — 
2024-1 Notes457,500 457,500 455,083 2,417 — — 
Total$9,307,500 $7,093,864 $7,056,091 $34,877 $2,213,636 $2,191,402 
(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, 2024, 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, 2024, the Company had non-USD borrowings denominated in the following currencies:
•CAD 38.2 million
•EUR 277.7 million
•GBP 266.3 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 June 30,Six Months Ended June 30,
2025202420252024
Borrowing interest expense$84,569 $74,511 $172,209 $135,676 
Facility unused fees2,538 927 4,239 2,743 
Amortization of deferred financing costs1,440 1,705 2,850 3,403 
Amortization of original issue discount and debt issuance costs (including premiums and discounts)3,734 2,281 7,085 4,321 
Gain (loss) from interest rate swaps accounted for as hedges and the related hedged items:
Interest rate swaps(10,369)(2,015)(25,778)(2,015)
Hedged items10,373 1,432 24,658 1,432 
Total Interest Expense$92,285 $78,841 $185,263 $145,560 
Cash paid for interest expense$68,885 $61,034 $165,186 $133,658 
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.
 June 30, 2025December 31, 2024
ASSETS
Investments at fair value
Non-controlled/non-affiliated investments$752,513 $736,551 
Total investments at fair value
752,513 736,551 
Cash and cash equivalents (restricted cash of $87,065 and $2,499, respectively)
87,065 2,499 
Interest receivable from non-controlled/non-affiliated investments
10,217 8,268 
Total assets$849,795 $747,318 
LIABILITIES
Debt (net of unamortized debt issuance costs of $2,315 and $2,417, respectively)
$455,185 $455,083 
Interest payable
16,920 3,125 
Total liabilities$472,105 $458,208 
v3.25.2
Net Assets (Tables)
 6 Months Ended
Jun. 30, 2025
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 June 30, 2025, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering2,045,455 $64,205 $193 $64,012 $31.29 
(1)The Company received $5.4 million of proceeds subsequent to June 30, 2025 on July 1, 2025. The amount was recorded as Receivable for shares sold in the Consolidated Statement of Assets and Liabilities.
(2)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
The following table summarizes the total Common Shares issued and proceeds received, for the six months ended June 30, 2025, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering7,807,103 $250,902 $2,060 $248,842 $31.87 
(1)The Company received $5.4 million of proceeds subsequent to June 30, 2025 on July 1, 2025. The amount was recorded as Receivable for shares sold in the Consolidated Statement of Assets and Liabilities.
(2)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
The following table summarizes the total Common Shares issued and proceeds received, for the three months ended June 30, 2024, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering6,333,768 $190,966 $831 $190,135 $30.02 
(1)The Company received $1.9 million of proceeds subsequent to June 30, 2024 on July 1, 2024. The amount was recorded as Receivable for shares sold in the Condensed Consolidated Statement of Assets and Liabilities.
(2)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
The following table summarizes the total Common Shares issued and proceeds received, for the six months ended June 30, 2024, through the “at-the-market” offering program:
Issuances of Common SharesNumber of Common Shares IssuedGross ProceedsPlacement Fees/Offering Expenses
Net Proceeds (1)
Average Share Price (2)
“At-the-market” Offering12,219,314 $353,693 $1,535 $352,158 $28.82 
(1)The Company received $1.9 million of proceeds subsequent to June 30, 2024 on July 1, 2024. The amount was recorded as Receivable for shares sold in the Condensed Consolidated Statement of Assets and Liabilities.
(2)Represents the net offering price per share after deducting placement fees and commissions and offering expenses.
Dividends Declared
The following table summarizes the Company’s distributions declared and payable for the six months ended June 30, 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 
May 7, 2025June 30, 2025July 25, 20250.7700 177,007 
Total distributions$1.5400 $352,428 
The following table summarizes the Company’s distributions declared and payable for the six months ended June 30, 2024 (dollars in thousands except per share amounts):
Date DeclaredRecord DatePayment DatePer Share AmountTotal Amount
February 28, 2024March 31, 2024April 26, 2024$0.7700 $147,743 
May 8, 2024June 30, 2024July 26, 20240.7700 152,706 
Total distributions$1.5400 $300,449 
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 six months ended June 30, 2025 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 24, 2025$5,130 165,096 
April 25, 20255,380 191,060 
Total distributions$10,510 356,156 
The following table summarizes the amounts and shares issued to shareholders who have not opted out of the DRIP during the six months ended June 30, 2024 (dollars in thousands except share amounts):
Payment DateDRIP Shares ValueDRIP Shares Issued
January 26, 2024$5,614 206,465 
April 26, 20245,293 173,614 
Total distributions$10,907 380,079 
v3.25.2
Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2025
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 June 30,Six Months Ended June 30,
2025202420252024
Net increase (decrease) in net assets resulting from operations$155,042 $196,186 $304,851 $379,941 
Weighted average shares outstanding (basic and diluted)228,192,335 193,908,352 227,389,213 192,254,100 
Earnings (loss) per common share (basic and diluted)$0.68 $1.01 $1.34 $1.98 
v3.25.2
Financial Highlights and Senior Securities (Tables)
 6 Months Ended
Jun. 30, 2025
Investment Company [Abstract]  
Schedule of Financial Highlights
The following are the financial highlights for the six months ended June 30, 2025 and 2024:
Six Months Ended June 30,
 20252024
Per Share Data (1):
Net asset value, beginning of period$27.39 $26.66 
Net investment income
1.60 1.76 
Net change in unrealized and realized gain (loss)
(0.26)0.21 
Net increase (decrease) in net assets resulting from operations1.34 1.97 
Distributions from net investment income (2)
(1.54)(1.54)
Net increase (decrease) in net assets from capital share transactions0.14 0.10 
Total increase (decrease) in net assets(0.06)0.53 
Net asset value, end of period$27.33 $27.19 
Market value, end of period
$30.75 $30.62 
Shares outstanding, end of period230,055,444 198,381,800 
Total return based on NAV (3)
5.1 %7.3 %
Total return based on market value (4)
0.2 %16.8 %
Ratios:
Ratio of net expenses to average net assets (5)
10.6 %11.1 %
Ratio of net investment income to average net assets (5)
11.7 %12.9 %
Portfolio turnover rate8.9 %2.6 %
Supplemental Data:
Net assets, end of period$6,288,296$5,394,573
Asset coverage ratio188.5 %188.3 %
(1)The per share data was derived by using the weighted average shares outstanding during the period.
(2)The per share data for distributions was derived by using the actual shares outstanding at the date of the relevant transactions (refer to Note 9).
(3)Total return is calculated as the change in NAV per share during the period, plus distributions per share (assuming dividends and distributions are reinvested in accordance with the DRIP) divided by the beginning NAV per share. Total return does not include sales load.
(4)Total return based on market value is calculated as the change in market value per share during the respective periods, taking into account distributions, if any, reinvested in accordance with the DRIP.
(5)Amounts are annualized except for amounts relating to excise tax expense. For the six months ended June 30, 2025 and 2024, the ratio of total operating expenses to average net assets was 10.6% and 11.1%.
v3.25.2
Significant Accounting Policies (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accounting Policies [Abstract]        
Interest income $ 1,700 $ 400 $ 14,600 $ 2,300
Excise and other tax expense $ 3,798 $ 3,421 $ 7,966 $ 6,771
v3.25.2
Agreements and Related Party Transactions - Investment Advisory Agreement (Details) - Investment Advisory Agreement - component
 6 Months Ended
Apr. 30, 2025
Oct. 28, 2021
Oct. 18, 2021
Jun. 30, 2025
Related Party Transaction [Line Items]        
Quarterly hurdle rate   1.50%    
Number of components       1
Related party transaction, renewal term 1 year      
Affiliated Entity        
Related Party Transaction [Line Items]        
Quarterly hurdle rate     1.50%  
Notice period       60 days
Number of components       2
v3.25.2
Agreements and Related Party Transactions - Base Management Fee (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 32 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2024
Dec. 31, 2024
Related Party Transaction [Line Items]            
Management fees $ 34,600 $ 28,094 $ 68,901 $ 54,134    
Management fees payable $ 34,600   $ 34,600     $ 32,305
Investment Advisory Agreement            
Related Party Transaction [Line Items]            
Management fee rate         1.00%  
v3.25.2
Agreements and Related Party Transactions - Incentive Fees (Details)
 3 Months Ended 6 Months Ended 29 Months Ended
Oct. 28, 2021
Oct. 18, 2021
Jun. 30, 2025
USD ($)
component
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
component
Jun. 30, 2024
USD ($)
Mar. 31, 2024
Dec. 31, 2024
USD ($)
Related Party Transaction [Line Items]                
Income based incentive fees (Note 3)     $ 34,718,000 $ 37,380,000 $ 69,019,000 $ 73,225,000    
Income based incentive fees payable (Note 3)     34,718,000   34,718,000     $ 38,708,000
Capital gains based incentive fees (Note 3)     0 $ 3,122,000 0 $ 6,256,000    
Capital gains based incentive fees payable (Note 3)     $ 0   $ 0     $ 0
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%      
Investment Advisory Agreement                
Related Party Transaction [Line Items]                
Number of components | component     1   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 | Affiliated Entity                
Related Party Transaction [Line Items]                
Number of components | component     2   2      
Quarterly hurdle rate   1.50%            
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%              
v3.25.2
Agreements and Related Party Transactions - Administration Agreement (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Oct. 01, 2018
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Related Party Transaction [Line Items]              
Administrative service expenses     $ 744 $ 765 $ 1,710 $ 1,442  
Affiliated Entity              
Related Party Transaction [Line Items]              
Due to affiliates     5,646   5,646   $ 7,112
Administration Agreement              
Related Party Transaction [Line Items]              
Related party transaction, initial term   2 years          
Related party transaction, renewal term 1 year            
Administration Agreement | Affiliated Entity              
Related Party Transaction [Line Items]              
Due to affiliates     $ 1,300   $ 1,300   $ 1,500
v3.25.2
Agreements and Related Party Transactions - Sub-Administration and Expense Support (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
v3.25.2
Agreements and Related Party Transactions - Expense Payments and Reimbursement Payments (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Jun. 30, 2025
Dec. 31, 2024
Related Party Transaction [Line Items]        
Reimbursement payments $ 0 $ 0    
Recoupment of expense support 0 0    
Affiliated Entity        
Related Party Transaction [Line Items]        
Due to affiliates     $ 5,646,000 $ 7,112,000
Expense Support Agreement | Affiliated Entity        
Related Party Transaction [Line Items]        
Due to affiliates $ 0 $ 0    
v3.25.2
Investments - Investment Portfolio at Cost and Fair Value (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Cost $ 13,327,359 $ 13,193,219
Fair Value $ 13,252,800 $ 13,092,518
Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
First lien debt    
Schedule of Investments [Line Items]    
Cost $ 13,113,676 [1],[2],[3] $ 12,959,332 [4],[5],[6]
Fair Value $ 13,015,201 [1],[2] $ 12,830,389 [4],[6]
First lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 98.20% 98.00%
Second lien debt    
Schedule of Investments [Line Items]    
Cost $ 123,559 [1],[2],[3] $ 122,634 [4],[5],[6]
Fair Value $ 122,942 [1],[2] $ 119,184 [4],[6]
Second lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.90% 0.90%
Unsecured debt    
Schedule of Investments [Line Items]    
Cost $ 14,009 [1],[2],[3] $ 33,644 [4],[5],[6]
Fair Value $ 13,721 [1],[2] $ 33,521 [4],[6]
Unsecured debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.30%
Equity    
Schedule of Investments [Line Items]    
Cost $ 76,115 [1],[2],[3] $ 77,609 [4],[5],[6]
Fair Value $ 100,936 [1],[2] $ 109,424 [4],[6]
Equity | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.80% 0.80%
[1]
(1)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 June 30, 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.
[2] 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 June 30, 2025, the aggregate fair value of these securities is $13,251.4 million or 210.76% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[3] 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”).
[4] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities.” As of December 31, 2024, the aggregate fair value of these securities is $13,092.5 million or 215.43% 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 dollars. As of December 31, 2024, 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.
v3.25.2
Investments - Investments at Fair Value Percent (Details) - Investment Owned, At Fair Value - Investment Type Concentration Risk
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
Aerospace & Defense    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 4.40% 4.40%
Air Freight & Logistics    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 2.10% 3.00%
Auto Components    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.00% 0.00%
Biotechnology    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.00%
Building Products    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 2.30% 2.40%
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% 7.70%
Construction & Engineering    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.80% 0.80%
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 3.00% 3.10%
Diversified Consumer Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 4.30% 4.60%
Diversified Telecommunication Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 1.00% 1.00%
Electric Utilities    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 1.00% 1.10%
Electrical Equipment    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.80% 0.80%
Electronic Equipment, Instruments & Components    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 2.00% 1.90%
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% 0.30%
Ground Transportation    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.20%
Health Care Equipment & Supplies    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.40% 0.70%
Health Care Providers & Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 9.60% 9.20%
Health Care Technology    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 5.20% 5.00%
Insurance    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 8.20% 7.40%
Interactive Media & Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.40% 0.50%
Internet & Direct Marketing Retail    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.00% 2.40%
IT Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 5.40% 4.40%
Life Sciences Tools & Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.90% 0.60%
Machinery    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.30% 0.20%
Marine    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.50% 0.40%
Media    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.60% 0.40%
Oil, Gas & Consumable Fuels    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.60% 0.60%
Paper & Forest Products    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.10%
Pharmaceuticals    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.30% 0.20%
Professional Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 8.80% 8.40%
Real Estate Management & Development    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 1.20% 1.10%
Software    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 20.30% 20.10%
Specialty Retail    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 1.40% 1.30%
Technology Hardware, Storage & Peripherals    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.60% 0.60%
Trading Companies & Distributors    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.90% 1.00%
Transportation Infrastructure    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 2.80% 3.40%
Wireless Telecommunication Services    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.20% 0.00%
v3.25.2
Investments - Geographic Investment (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Cost $ 13,327,359 $ 13,193,219
Fair Value $ 13,252,800 $ 13,092,518
Fair Value as % of Net Assets 210.80% 215.50%
Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
United States    
Schedule of Investments [Line Items]    
Cost $ 11,897,748 $ 11,663,322
Fair Value $ 11,768,803 $ 11,595,231
Fair Value as % of Net Assets 187.20% 190.80%
United States | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 88.80% 88.60%
Europe    
Schedule of Investments [Line Items]    
Cost $ 1,161,035 $ 1,138,542
Fair Value $ 1,210,929 $ 1,104,837
Fair Value as % of Net Assets 19.20% 18.20%
Europe | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 9.20% 8.40%
Canada    
Schedule of Investments [Line Items]    
Cost $ 119,027 $ 241,124
Fair Value $ 122,667 $ 242,103
Fair Value as % of Net Assets 2.00% 4.00%
Canada | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.90% 1.80%
Bermuda/Cayman Islands    
Schedule of Investments [Line Items]    
Cost $ 148,911 $ 149,595
Fair Value $ 149,748 $ 149,735
Fair Value as % of Net Assets 2.40% 2.50%
Bermuda/Cayman Islands | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 1.10% 1.20%
Asia    
Schedule of Investments [Line Items]    
Cost $ 638 $ 636
Fair Value $ 653 $ 612
Fair Value as % of Net Assets 0.00% 0.00%
Asia | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration Risk, Percentage 0.00% 0.00%
v3.25.2
Investments - Additional Information (Details)
 6 Months Ended 12 Months Ended
Jun. 30, 2025
borrower
loan
Dec. 31, 2024
loan
borrower
Schedule of Investments [Line Items]    
Number of borrowers | borrower 4 4
Number of loans in non-accrual status | loan 5 5
Debt Securities, Variable Rate | Investments At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration percentage 99.80% 99.80%
Debt Securities, Fixed Rate | Investments At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
Concentration percentage 0.20% 0.20%
v3.25.2
Fair Value Measurements - Fair Value Hierarchy of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total $ 13,252,800 $ 13,092,518
First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 13,015,201 12,830,389
Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 122,942 119,184
Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 13,721 33,521
Investments in equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 100,936 109,424
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 1,430 0
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 | Investments in equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 1,430 0
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 214,844 115,753
Level 2 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 214,844 115,753
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 | Investments in 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 13,036,526 12,976,765
Level 3 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,800,357 12,714,636
Level 3 | Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 122,942 119,184
Level 3 | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 13,721 33,521
Level 3 | Investments in equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total $ 99,506 $ 109,424
v3.25.2
Fair Value Measurements - Summary of Changes in Fair Value of Investments Measured Using Level 3 Inputs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Total Investments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value, beginning of period $ 13,036,526 $ 11,127,846 $ 13,036,526 $ 11,127,846 $ 12,602,272 $ 12,976,765 $ 10,330,365 $ 9,710,582
Purchases of investments 549,363 906,931 1,267,152 1,644,649        
Proceeds from principal repayments and sales of investments (164,206) (87,920) (1,162,200) (272,398)        
Accretion of discount (amortization of premium) 10,523 9,261 26,607 18,606        
Transfers into level 3 0 0 225 0        
Transfers out of level 3 0 (51,434) (102,175) (802)        
Fair value, end of period 13,036,526 11,127,846 13,036,526 11,127,846        
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 40,119 20,059 29,549 29,126        
Investments, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) (1,232) 195 7,103 623        
Investments, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) 39,806 20,448 23,049 26,586        
First lien debt                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value, beginning of period 12,800,357 10,975,967 12,800,357 10,975,967 12,370,969 12,714,636 10,178,311 9,564,203
Purchases of investments 546,760 906,014 1,262,249 1,639,580        
Proceeds from principal repayments and sales of investments (163,314) (87,920) (1,128,141) (272,398)        
Accretion of discount (amortization of premium) 10,437 9,227 26,437 18,538        
Transfers into level 3 0 0 225 0        
Transfers out of level 3 0 (51,434) (102,175) (802)        
Fair value, end of period 12,800,357 10,975,967 12,800,357 10,975,967        
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 37,050 21,185 30,042 28,769        
Debt Securities, First Lien, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) (1,232) 195 (212) 623        
Debt Securities, First Lien, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) 36,737 21,574 27,338 26,223        
Second lien debt                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value, beginning of period 122,942 41,985 122,942 41,985 118,482 119,184 41,515 41,515
Purchases of investments 2,123 501 3,787 681        
Proceeds from principal repayments and sales of investments (662) 0 (3,010) 0        
Accretion of discount (amortization of premium) 75 23 149 48        
Transfers into level 3 0 0 0 0        
Transfers out of level 3 0 0 0 0        
Fair value, end of period 122,942 41,985 122,942 41,985        
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 2,924 (54) 2,347 (259)        
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 0 (1) 0        
Debt Securities, Second Lien, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) 2,924 (54) 2,833 (259)        
Unsecured debt                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value, beginning of period 13,721 12,278 13,721 12,278 13,658 33,521 11,859 9,924
Purchases of investments 471 413 939 2,198        
Proceeds from principal repayments and sales of investments 0 0 (20,595) 0        
Accretion of discount (amortization of premium) 11 11 21 20        
Transfers into level 3 0 0 0 0        
Transfers out of level 3 0 0 0 0        
Fair value, end of period 13,721 12,278 13,721 12,278        
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 (419) (5) (435) 130        
Unsecured Debt, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) 0 0 0 0        
Unsecured Debt, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) (419) (5) (165) 136        
Investments in equity                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value, beginning of period 99,506 97,616 99,506 97,616 $ 99,163 $ 109,424 $ 98,680 $ 94,940
Purchases of investments 9 3 177 2,190        
Proceeds from principal repayments and sales of investments (230) 0 (10,454) 0        
Accretion of discount (amortization of premium) 0 0 0 0        
Transfers into level 3 0 0 0 0        
Transfers out of level 3 0 0 0 0        
Fair value, end of period 99,506 97,616 99,506 97,616        
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 564 (1,067) (2,405) 486        
Equity Securities, Realized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) 0 0 7,316 0        
Equity Securities, Unrealized Gain (Loss)                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Net realized gain (loss) $ 564 $ (1,067) $ (6,957) $ 486        
v3.25.2
Fair Value Measurements - Unobservable Inputs (Details)
$ in Thousands
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 13,252,800 $ 13,092,518
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 13,036,526 12,976,765
First lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 12,800,357 12,714,636
First lien debt | Yield Analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 12,651,785 12,546,382
First lien debt | Market Quotations | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 115 102,316
First lien debt | Asset Recoverability | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   2,059
First lien debt | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 148,457 $ 63,879
First lien debt | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0495 0.0700
First lien debt | Low | Market Quotations | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 97.25 97.00
First lien debt | Low | Asset Recoverability | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1033
First lien debt | Low | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.12 10
First lien debt | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1704 0.2267
First lien debt | High | Market Quotations | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 97.25 100.57
First lien debt | High | Asset Recoverability | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1092
First lien debt | High | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.5 10.75
First lien debt | Weighted Average | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0979 0.1015
First lien debt | Weighted Average | Market Quotations | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 97.25 100.08
First lien debt | Weighted Average | Asset Recoverability | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1036
First lien debt | Weighted Average | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.71 10.4
Second lien debt | Yield Analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 122,942 $ 119,184
Second lien debt | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0851 0.0886
Second lien debt | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1662 0.1673
Second lien debt | Weighted Average | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1104 0.1152
Unsecured debt | Yield Analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 13,721 $ 33,521
Unsecured debt | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1306 0.0771
Unsecured debt | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1451 0.1394
Unsecured debt | Weighted Average | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1431 0.1012
Investments in equity | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 99,506 $ 109,424
Investments in equity | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 22,592 21,697
Investments in equity | Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 59,947  
Investments in equity | Market Approach | Level 3 | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   69,633
Investments in equity | Market Approach | Level 3 | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   429
Investments in equity | Asset Recoverability | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 2,844 3,166
Investments in equity | Option Pricing Model | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 14,123 $ 14,499
Investments in equity | Low | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1142 0.0954
Investments in equity | Low | Market Approach | Level 3 | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 6.4 2.3
Investments in equity | Low | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.5 10
Investments in equity | Low | Option Pricing Model | Level 3 | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3200 0.2350
Investments in equity | High | Yield Analysis | Level 3 | Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2096 0.1947
Investments in equity | High | Market Approach | Level 3 | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 28.5 30
Investments in equity | High | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.5 10.75
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 0.1305 0.1555
Investments in equity | Weighted Average | Market Approach | Level 3 | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 12.7 10.11
Investments in equity | Weighted Average | Asset Recoverability | Level 3 | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.5 10.5
Investments in equity | Weighted Average | Option Pricing Model | Level 3 | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3753 0.3403
v3.25.2
Fair Value Measurements - Schedule of Fair Value Measurements of Unsecured Notes (Details) - Level 3 - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 4,769,730 $ 4,222,693
2026 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 795,040 788,880
New 2026 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 681,730 672,420
2027 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 621,075 608,725
2028 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 605,085 590,200
November 2027 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 408,560 406,440
April 2028 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 705,180 698,460
June 2030 Notes | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 495,600 0
2024-1 Notes | Term Loan    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 457,460 $ 457,568
v3.25.2
Derivatives - Schedule of Aggregate Notional Amount and Fair Value Hierarchy of the Company (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Derivative Assets    
Derivative asset $ 22,991 $ 6,396
Notional 1,600,000 571,016
Derivative Liabilities    
Derivative liabilities (2,646) (7,164)
Notional 188,193 700,000
Cash collateral posted 11,070 4,807
Level 1    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities 0 0
Level 2    
Derivative Assets    
Derivative asset 22,991 6,396
Derivative Liabilities    
Derivative liabilities (2,646) (7,164)
Level 3    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities 0 0
Foreign currency forward contracts    
Derivative Assets    
Derivative asset 0 2,401
Notional 0 171,016
Derivative Liabilities    
Derivative liabilities (2,646) 0
Notional 188,193 0
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 0 2,401
Derivative Liabilities    
Derivative liabilities (2,646) 0
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 22,991 3,995
Notional 1,600,000 400,000
Derivative Liabilities    
Derivative liabilities 0 (7,164)
Notional 0 700,000
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 22,991 3,995
Derivative Liabilities    
Derivative liabilities 0 (7,164)
Interest Rate Swap | Level 3    
Derivative Assets    
Derivative asset 0 0
Derivative Liabilities    
Derivative liabilities $ 0 $ 0
v3.25.2
Derivatives - Derivative Instrument Gain (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Net change in unrealized appreciation (depreciation)     $ (5,047) $ 0
Not Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Net change in unrealized appreciation (depreciation) $ (3,126) $ 0 (5,047) 0
Net realized gain (loss) (7,673) 0 (9,727) 0
Not Designated as Hedging Instrument | Foreign currency forward contracts        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Net change in unrealized appreciation (depreciation) (3,126) 0 (5,047) 0
Net realized gain (loss) $ (7,673) $ 0 $ (9,727) $ 0
v3.25.2
Derivatives - Offsetting Derivative Instrument (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Derivative Asset    
Derivative Assets Subject to Master Netting Agreement $ 22,991 $ 6,396
Derivatives Available for Offset (2,646) (2,401)
Cash Collateral Offset 0 0
Net Amount Derivative Asset 20,345 3,995
Cash Collateral Received 0 0
Cash Collateral Received Not Offset 0 0
Derivative Liability    
Derivative Liabilities Subject to Master Netting Agreement (2,646) (7,164)
Derivatives Available for Offset 2,646 2,401
Cash Collateral Offset 0 4,763
Net Amount Derivative Liabilities 0 0
Cash Collateral Posted 11,070 9,570
Cash collateral pledged not offset 11,070 4,807
SMBC Capital Markets, Inc.    
Derivative Asset    
Derivative Assets Subject to Master Netting Agreement 8,969 3,995
Derivatives Available for Offset 0 0
Cash Collateral Offset 0 0
Net Amount Derivative Asset 8,969 3,995
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 1,770 1,770
Cash collateral pledged not offset 1,770 1,770
Wells Fargo Bank, N.A.    
Derivative Asset    
Derivative Assets Subject to Master Netting Agreement 14,022 2,401
Derivatives Available for Offset (2,646) (2,401)
Cash Collateral Offset 0 0
Net Amount Derivative Asset 11,376 0
Cash Collateral Received 0 0
Cash Collateral Received Not Offset 0 0
Derivative Liability    
Derivative Liabilities Subject to Master Netting Agreement (2,646) (7,164)
Derivatives Available for Offset 2,646 2,401
Cash Collateral Offset 0 4,763
Net Amount Derivative Liabilities 0 0
Cash Collateral Posted 9,300 7,800
Cash collateral pledged not offset $ 9,300 $ 3,037
v3.25.2
Derivatives - Schedule of Interest Rate Swaps as the Hedging Instrument (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Derivative [Line Items]        
Interest rate swaps $ 10,369 $ 2,015 $ 25,778 $ 2,015
Hedged items (10,373) (1,432) (24,658) (1,432)
Interest Rate Swap        
Derivative [Line Items]        
Interest rate swaps 10,369 2,015 25,778 2,015
Hedged items $ (10,373) $ (1,432) $ (24,658) $ (1,432)
v3.25.2
Derivatives - Schedule of Carrying Value of Unsecured Borrowings (Details) - Long-Term Debt - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Value $ 1,598,918 $ 1,082,389
Cumulative Hedging Adjustments $ 21,762 $ (2,896)
v3.25.2
Borrowings - Jackson Hole Funding Facility (Details)
Dec. 19, 2024
Dec. 18, 2024
Jun. 30, 2025
USD ($)
Jun. 30, 2025
EUR (€)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
EUR (€)
Jun. 30, 2024
Debt Instrument [Line Items]              
Asset coverage ratio     188.50% 188.50% 185.70% 185.70% 188.30%
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%          
v3.25.2
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%
v3.25.2
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
Jun. 30, 2025
Dec. 31, 2024
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%    
v3.25.2
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%
v3.25.2
Borrowings - Revolving Credit Facility (Details) - Line of Credit
€ in Millions, £ in Millions, $ in Millions, $ in Millions
Aug. 06, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2025
EUR (€)
Jun. 30, 2025
CAD ($)
Jun. 30, 2025
GBP (£)
Jun. 30, 2025
AUD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
EUR (€)
Dec. 31, 2024
CAD ($)
Dec. 31, 2024
GBP (£)
Dec. 31, 2024
AUD ($)
Jun. 09, 2023
Term Loan | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Line of credit facility, maximum borrowing capacity   $ 423,500,000                    
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   2,325,000,000 € 283.9 $ 30.7 £ 258.0 $ 1.0 $ 2,225,000,000 € 277.7 $ 38.2 £ 266.3 $ 1.0  
Unused capacity, commitment fee percentage 0.325%                      
Revolving Credit Facility | CitiBank, Revolving Credit Facility, Revolving Commitments                        
Debt Instrument [Line Items]                        
Line of credit facility, maximum borrowing capacity   2,300,000,000                    
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   $ 1,900,000,000                    
v3.25.2
Borrowings - Unsecured Debt (Details) - USD ($)
 6 Months Ended
Jun. 30, 2025
Mar. 04, 2025
Dec. 31, 2024
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 $ 9,907,500,000   $ 9,307,500,000                  
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   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 $ 500,000,000.0                    
Interest rate   5.30%                    
v3.25.2
Borrowings - 2024-1 CLO Debt (Details) - USD ($)
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Nov. 21, 2024
Debt Instrument [Line Items]      
Aggregate Principal Committed $ 9,907,500,000 $ 9,307,500,000  
Principal outstanding 7,107,646,000 7,093,864,000  
Investments at fair value 13,252,800,000 13,092,518,000  
Restricted cash 87,065,000 2,499,000  
Cash and cash equivalents 273,678,000 229,606,000  
Total assets 13,710,955,000 13,472,224,000  
Debt 7,090,550,000 7,056,091,000  
Unamortized Debt Issuance Costs (including premiums and discounts) 38,859,000 34,877,000  
Interest payable 65,174,000 53,958,000  
Total liabilities 7,422,659,000 7,395,703,000  
2024-1 Issuer      
Debt Instrument [Line Items]      
Investments at fair value 752,513,000 736,551,000  
Restricted cash 87,065,000 2,499,000  
Cash and cash equivalents 87,065,000 2,499,000  
Total assets 849,795,000 747,318,000  
Debt 455,185,000 455,083,000  
Unamortized Debt Issuance Costs (including premiums and discounts) 2,315,000 2,417,000  
Interest payable 16,920,000 3,125,000  
Total liabilities 472,105,000 458,208,000  
Non-controlled/non-affiliated investments      
Debt Instrument [Line Items]      
Investments at fair value 13,223,290,000 [1],[2] 13,063,171,000 [3],[4]  
Interest receivable from non-controlled/non-affiliated investments 104,702,000 112,046,000  
Non-controlled/non-affiliated investments | 2024-1 Issuer      
Debt Instrument [Line Items]      
Investments at fair value 752,513,000 736,551,000  
Interest receivable from non-controlled/non-affiliated investments 10,217,000 8,268,000  
2024-1 CLO Debt      
Debt Instrument [Line Items]      
Aggregate Principal Committed 457,500,000 457,500,000  
Principal outstanding 746,770,000    
Debt 455,185,000 455,083,000  
Unamortized Debt Issuance Costs (including premiums and discounts) 2,315,000 $ 2,417,000  
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]
(1)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 June 30, 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.
[2] 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 June 30, 2025, the aggregate fair value of these securities is $13,251.4 million or 210.76% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[3] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities.” As of December 31, 2024, the aggregate fair value of these securities is $13,092.5 million or 215.43% 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 dollars. As of December 31, 2024, 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.
v3.25.2
Borrowings - Outstanding Debt Obligations (Details)
£ in Millions, $ in Millions, $ in Millions
Jun. 30, 2025
USD ($)
Jun. 30, 2025
EUR (€)
Jun. 30, 2025
CAD ($)
Jun. 30, 2025
GBP (£)
Jun. 30, 2025
AUD ($)
Mar. 04, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
EUR (€)
Dec. 31, 2024
CAD ($)
Dec. 31, 2024
GBP (£)
Dec. 31, 2024
AUD ($)
Dec. 16, 2024
USD ($)
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 $ 9,907,500,000           $ 9,307,500,000                          
Outstanding Principal 7,107,646,000           7,093,864,000                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 7,090,550,000           7,056,091,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) 38,859,000           34,877,000                          
Unused portion 2,799,854,000           2,213,636,000                          
Amount available 2,704,165,000           2,191,402,000                          
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 99,874,000           399,874,000                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 99,874,000           399,874,000                          
Unused portion 400,126,000           100,126,000                          
Amount available 400,126,000           100,126,000                          
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 595,850,000           649,350,000                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 595,850,000           649,350,000                          
Unused portion 579,150,000           525,650,000                          
Amount available 536,336,000           525,650,000                          
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 343,150,000           400,000,000                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 343,150,000           400,000,000                          
Unused portion 306,850,000           250,000,000                          
Amount available 253,975,000           227,766,000                          
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 0           0                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 0           0                          
Unused portion 400,000,000           400,000,000                          
Amount available 400,000,000           400,000,000                          
Revolving Credit Facility | Line of Credit | Revolving Credit Facility                                        
Debt Instrument [Line Items]                                        
Aggregate Principal Committed 2,325,000,000 € 283,900,000 $ 30.7 £ 258.0 $ 1.0   2,225,000,000 € 277,700,000 $ 38.2 £ 266.3 $ 1.0                  
Outstanding Principal 1,211,272,000           1,287,140,000                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 1,211,272,000           1,287,140,000                          
Unused portion 1,113,728,000           937,860,000                          
Amount available 1,113,728,000           937,860,000                          
3.625% Notes Due 2026 | Unsecured debt                                        
Debt Instrument [Line Items]                                        
Aggregate Principal Committed 800,000,000           800,000,000                       $ 300,000,000.0 $ 500,000,000.0
Outstanding Principal 800,000,000           800,000,000                          
Carrying Value (net of unamortized issuance costs, premiums and discounts) 799,026,000           798,145,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) 974,000           1,855,000                          
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) 697,857,000           696,980,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) 2,143,000           3,020,000                          
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) 645,529,000           644,167,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) 4,471,000           5,833,000                          
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) 643,889,000           642,963,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) 6,111,000           7,037,000                          
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) 403,545,000           397,898,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) 4,813,000           5,818,000                          
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) 698,176,000           684,491,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) 7,450,000           8,897,000                          
5.300% notes due 2030 | Unsecured debt                                        
Debt Instrument [Line Items]                                        
Aggregate Principal Committed 500,000,000         $ 500,000,000.0                            
Outstanding Principal 500,000,000                                      
Carrying Value (net of unamortized issuance costs, premiums and discounts) 497,197,000                                      
Unamortized Debt Issuance Costs (including premiums and discounts) 10,582,000                                      
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) 455,185,000           455,083,000                          
Unamortized Debt Issuance Costs (including premiums and discounts) $ 2,315,000           $ 2,417,000                          
v3.25.2
Borrowings - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Debt Disclosure [Abstract]          
Interest expense $ 64.9   $ 64.9   $ 53.4
Unused commitment fees $ 0.3   $ 0.3   $ 0.6
Weighted average interest rate 5.03% 5.26% 5.02% 5.18%  
Weighted average interest rate all-in 5.10% 5.38% 5.09% 5.31%  
Average principal debt outstanding $ 7,155.4 $ 5,798.8 $ 7,234.0 $ 5,422.5  
v3.25.2
Borrowings - Interest Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Debt Disclosure [Abstract]        
Borrowing interest expense $ 84,569 $ 74,511 $ 172,209 $ 135,676
Facility unused fees 2,538 927 4,239 2,743
Amortization of deferred financing costs 1,440 1,705 2,850 3,403
Amortization of original issue discount and debt issuance costs (including premiums and discounts) 3,734 2,281 7,085 4,321
Gain (loss) from interest rate swaps accounted for as hedges and the related hedged items:        
Interest rate swaps (10,369) (2,015) (25,778) (2,015)
Hedged items 10,373 1,432 24,658 1,432
Interest expense 92,285 78,841 185,263 145,560
Cash paid for interest expense $ 68,885 $ 61,034 $ 165,186 $ 133,658
v3.25.2
Commitment and Contingencies (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Other Commitments [Line Items]    
Estimated future amount $ 175.7 $ 162.3
Delayed Draw Term Loans And Revolvers    
Other Commitments [Line Items]    
Unfunded commitments $ 1,900.0 $ 1,700.0
v3.25.2
Net Assets - Subscriptions and Drawdowns (Details) - $ / shares
Jun. 30, 2025
Dec. 31, 2024
Equity [Abstract]    
Common stock, par value (in usd per share) $ 0.001 $ 0.001
v3.25.2
Net Assets - Schedule of Shares Issued and Proceeds Received (Details)
 3 Months Ended 6 Months Ended
Jul. 01, 2025
USD ($)
Jul. 01, 2024
USD ($)
Jun. 30, 2025
USD ($)
equity_distribution_agreement
$ / shares
shares
Jun. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
equity_distribution_agreement
$ / shares
shares
Jun. 30, 2024
USD ($)
$ / shares
shares
Subsidiary, Sale of Stock [Line Items]            
Number of agreements | equity_distribution_agreement     8   8  
Aggregate sales price     $ 600,000,000.0   $ 600,000,000.0  
Remaining available for issuance     $ 439,500,000   439,500,000  
Net proceeds         $ 247,854,000 $ 350,237,000
At-the-Market Offering, Offering            
Subsidiary, Sale of Stock [Line Items]            
Number of common shares issued (in shares) | shares     2,045,455 6,333,768    
Gross proceeds     $ 64,205,000 $ 190,966,000    
Placement Fees/Offering Expenses     193,000 831,000    
Net proceeds   $ 1,900,000 $ 64,012,000 $ 190,135,000    
Offering price per share (in usd per share) | $ / shares     $ 31.29 $ 30.02 $ 31.29 $ 30.02
At-the-Market Offering, Offering | Subsequent Event            
Subsidiary, Sale of Stock [Line Items]            
Net proceeds $ 5,400,000          
At-the-Market Offering, Offering 2            
Subsidiary, Sale of Stock [Line Items]            
Number of common shares issued (in shares) | shares         7,807,103 12,219,314
Gross proceeds         $ 250,902,000 $ 353,693,000
Placement Fees/Offering Expenses         2,060,000 1,535,000
Net proceeds         $ 248,842,000 $ 352,158,000
Offering price per share (in usd per share) | $ / shares     $ 31.87 $ 28.82 $ 31.87 $ 28.82
v3.25.2
Net Assets - Distributions Declared (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Equity [Abstract]            
Per share amount (in usd per share) $ 0.7700 $ 0.7700 $ 0.7700 $ 0.7700 $ 1.5400 $ 1.5400
Total Amount $ 177,007 $ 175,421 $ 152,706 $ 147,743 $ 352,428 $ 300,449
v3.25.2
Net Assets - Dividend Reinvestment (Details)
 6 Months Ended
Jun. 30, 2025
Equity [Abstract]  
Purchase price of common stock, percent of market price 95.00%
v3.25.2
Net Assets - Scheduled of Amounts Received and Shares Issued (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 25, 2025
Jan. 24, 2025
Apr. 26, 2024
Jan. 26, 2024
Jun. 30, 2025
 [1]
Jun. 30, 2024
 [2]
Jun. 30, 2025
Jun. 30, 2024
Equity [Abstract]                
DRIP Shares Value $ 5,380 $ 5,130 $ 5,293 $ 5,614 $ 5,380 $ 5,293 $ 10,510 [1] $ 10,907 [2]
DRIP shares issued (in shares) 191,060 165,096 173,614 206,465     356,156 380,079
[1] The par amount of the shares is less than 1,000 and rounds to zero.
[2] The par amount of the shares is less than 1,000 and rounds to zero.
v3.25.2
Net Assets - Share Repurchase Plan (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2023
Jun. 30, 2024
Jun. 30, 2024
Equity, Class of Treasury Stock [Line Items]      
Shares repurchased (in shares)   0 0
Company 10b-18 Plan      
Equity, Class of Treasury Stock [Line Items]      
Stock repurchase program authorized amount $ 250,000,000    
Period in force 1 year    
v3.25.2
Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Earnings Per Share [Abstract]        
Net increase (decrease) in net assets resulting from operations $ 155,042 $ 196,186 $ 304,851 $ 379,941
Weighted average shares outstanding basic (in shares) 228,192,335 193,908,352 227,389,213 192,254,100
Weighted average shares outstanding diluted (in shares) 228,192,335 193,908,352 227,389,213 192,254,100
Earnings (loss) per common share basic (in usd per share) $ 0.68 $ 1.01 $ 1.34 $ 1.98
Earnings (loss) per common share diluted (in usd per share) $ 0.68 $ 1.01 $ 1.34 $ 1.98
v3.25.2
Financial Highlights and Senior Securities (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Investment Company, Financial Highlights [Roll Forward]                
Net asset value, beginning of period (in usd per share)     $ 27.39 $ 26.66        
Net investment income, basic (in usd per share) $ 0.77 $ 0.89 1.60 1.76        
Net change in unrealized and realized gain (loss) (in usd per share)     (0.26) 0.21        
Net increase (decrease) in net assets resulting from operations (in usd per share)     1.34 1.97        
Distributions from net investment income (in usd per share)     (1.54) (1.54)        
Net increase (decrease) in net assets from capital share transactions (in usd per share)     0.14 0.10        
Total increase (decrease) in net assets (in usd per share)     (0.06) 0.53        
Net asset value, ending of period (in usd per share) 27.33 27.19 27.33 27.19        
Market value, end of period (in usd per share) $ 30.75 $ 30.62 $ 30.75 $ 30.62        
Shares outstanding end of period (in shares) 230,055,444 198,381,800 230,055,444 198,381,800   221,892,184    
Total return based on NAV     5.10% 7.30%        
Total return based on market value     0.20% 16.80%        
Ratios:                
Ratio of net expenses to average net assets     10.60% 11.10%        
Ratio of net investment income to average net assets     11.70% 12.90%        
Portfolio turnover rate     8.90% 2.60%        
Supplemental Data:                
Net assets, end of period $ 6,288,296 $ 5,394,573 $ 6,288,296 $ 5,394,573 $ 6,240,869 $ 6,076,521 $ 5,155,665 $ 4,952,041
Asset coverage ratio 188.50% 188.30% 188.50% 188.30%   185.70%    
Ratio of expenses to average net assets, before waivers     10.60% 11.10%        
v3.25.2
Subsequent Events (Details) - USD ($)
 3 Months Ended 6 Months Ended
Aug. 06, 2025
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Aug. 04, 2025
Aug. 06, 2024
Subsequent Event [Line Items]                  
Distributions declared and payable per share (in usd per share)   $ 0.7700 $ 0.7700 $ 0.7700 $ 0.7700 $ 1.5400 $ 1.5400    
Revolving Credit Facility | CitiBank, Revolving Credit Facility, Revolving Commitments | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity   $ 2,300,000,000       $ 2,300,000,000      
Letter of Credit | CitiBank, Revolving Credit Facility, Revolving Commitments 2026 | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity                 $ 200,000,000.0
Letter of Credit | CitiBank, Revolving Credit Facility, Revolving Commitments 2027 | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity                 $ 200,000,000.0
Subsequent Event                  
Subsequent Event [Line Items]                  
Distributions declared and payable per share (in usd per share) $ 0.77                
Subsequent Event | Revolving Credit Facility | CitiBank, Revolving Credit Facility, Revolving Commitments | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity               $ 2,400,000,000  
Subsequent Event | Revolving Commitments | CitiBank, Revolving Credit Facility, Revolving Commitments | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity               2,000,000,000  
Subsequent Event | Term Loan | CitiBank, Revolving Credit Facility, Revolving Commitments | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity               433,500,000  
Subsequent Event | Letter of Credit | CitiBank, Revolving Credit Facility, Revolving Commitments 2026 | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity               200,000,000  
Subsequent Event | Letter of Credit | CitiBank, Revolving Credit Facility, Revolving Commitments 2027 | Line of Credit                  
Subsequent Event [Line Items]                  
Line of credit facility, maximum borrowing capacity               $ 200,000,000