ASSOCIATED BANC-CORP, 10-Q filed on 8/4/2026
Quarterly Report
v3.26.1
Document and Entity Information - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Jul. 31, 2026
Entity Information [Line Items]      
Document Type 10-Q 10-Q  
Document Quarterly Report   true  
Document Period End Date   Jun. 30, 2026  
Document Transition Report   false  
Entity File Number   001-31343  
Entity Registrant Name Associated Banc-Corp Associated Banc-Corp  
Entity Incorporation, State or Country Code   WI  
Entity Address, Address Line One   433 Main Street  
Entity Address, City or Town   Green Bay,  
Entity Address, State or Province   WI  
Entity Tax Identification Number   39-1098068  
Entity Address, Postal Zip Code   54301  
City Area Code   920  
Local Phone Number   491-7500  
Entity Current Reporting Status   Yes  
Entity Interactive Data Current   Yes  
Entity Filer Category   Large Accelerated Filer  
Entity Emerging Growth Company   false  
Entity Small Business   false  
Entity Shell Company   false  
Entity Common Stock, Shares Outstanding     188,849,659
Entity Central Index Key   0000007789  
Amendment Flag   false  
Document Fiscal Year Focus   2026  
Document Fiscal Period Focus   Q2  
Current Fiscal Year End Date   --12-31  
Document Information [Line Items]      
Amendment Flag   false  
The New York Stock Exchange      
Entity Information [Line Items]      
Title of 12(b) Security   Common stock, par value $0.01 per share  
Trading Symbol   ASB  
Security Exchange Name   NYSE  
The New York Stock Exchange | Two Thousand Twenty Three Subordinated Notes [Member]      
Entity Information [Line Items]      
Title of 12(b) Security   6.625% Fixed-Rate Reset Subordinated Notes due 2033  
Trading Symbol   ASBA  
Security Exchange Name   NYSE  
Series E Preferred Stock | The New York Stock Exchange      
Entity Information [Line Items]      
Title of 12(b) Security   Depositary Shrs, each representing 1/40th intrst in a shr of 5.875% Non-Cum. Perp Pref Stock, Srs E  
Trading Symbol   ASB PrE  
Security Exchange Name   NYSE  
Series F Preferred Stock | The New York Stock Exchange      
Entity Information [Line Items]      
Title of 12(b) Security   Depositary Shrs, each representing 1/40th intrst in a shr of 5.625% Non-Cum. Perp Pref Stock, Srs F  
Trading Symbol   ASB PrF  
Security Exchange Name   NYSE  
v3.26.1
Consolidated Balance Sheets - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Assets [Abstract]    
Cash and Due from Banks $ 548,057,000 $ 574,698,000
Interest-Bearing Deposits in Banks and Other Financial Institutions 1,268,379,000 1,144,123,000
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure 14,355,000 1,400,000
Debt Securities, Available-for-Sale 6,366,586,000 5,397,563,000
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss 3,510,726,000 3,602,519,000
Equity Securities, FV-NI and without Readily Determinable Fair Value 29,960,000 26,060,000
Federal Home Loan Bank Stock and Federal Reserve Bank Stock 329,436,000 252,514,000
Loans and Leases Receivable, Net of Deferred Income 36,467,040,000 31,163,614,000
Loans and Leases Receivable, Allowance (443,729,000) (378,068,000)
Loans and Leases Receivable, Net Amount 36,023,311,000 30,785,546,000
Other Short-Term Investments 235,536,000 236,657,000
Property, Plant and Equipment, Net 449,003,000 381,624,000
Life Insurance, Corporate or Bank Owned, Amount 717,116,000 694,452,000
Goodwill 1,147,081,000 1,104,992,000
Intangible Assets, Net (Excluding Goodwill) 116,953,000 22,849,000
Servicing Asset at Fair Value, Amount 87,683,000 86,337,000
Interest Receivable 181,916,000 161,118,000
Other Assets 676,918,000 657,645,000
Assets, Total 51,812,506,000 45,202,596,000
Liabilities and Equity [Abstract]    
Noninterest-Bearing Domestic Deposit, Demand 6,908,338,000 6,126,632,000
Interest-Bearing Deposit Liabilities, Domestic 33,022,917,000 29,425,976,000
Deposits, Total 39,931,255,000 35,552,608,000
Short-Term Debt 529,276,000 307,864,000
Federal Home Loan Bank, Advance, Branch of FHLBank, Amount 4,574,681,000 3,268,094,000
Other Long-Term Debt 591,080,000 594,276,000
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount 50,744,000 41,276,000
Other Liabilities 497,347,000 463,131,000
Liabilities, Total 46,174,383,000 40,227,249,000
Equity, Attributable to Parent [Abstract]    
Preferred Stock, Including Additional Paid in Capital 194,112,000 194,112,000
Common Stock, Value, Issued 2,120,000 1,890,000
Additional Paid in Capital, Common Stock 2,648,846,000 2,050,410,000
Retained Earnings (Accumulated Deficit) 3,378,406,000 3,226,756,000
Accumulated Other Comprehensive Income (Loss), Net of Tax (79,593,000) (7,566,000)
Treasury Stock, Value (505,768,000) (490,255,000)
Total Common Equity 5,444,011,000 4,781,235,000
Equity, Attributable to Parent, Total 5,638,123,000 4,975,347,000
Liabilities and Equity, Total $ 51,812,506,000 $ 45,202,596,000
Preferred Stock, Shares Authorized 750,000 750,000
Preferred Stock, Shares Issued 200,000 200,000
Common Stock, Shares Authorized 250,000,000 250,000,000
Common Stock, Shares, Issued 211,991,791 189,016,409
Common Stock, Shares, Outstanding 188,718,072 165,979,940
Preferred Stock, Par or Stated Value Per Share $ 1.00 $ 1.00
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Residential Mortgage [Member]    
Assets [Abstract]    
Financing Receivable, Held-for-Sale $ 94,490,000 $ 72,499,000
Loans and Leases Receivable, Net of Deferred Income 6,808,398,000 6,793,957,000
Liabilities and Equity [Abstract]    
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount 400,000 300,000
Commercial Loan    
Assets [Abstract]    
Financing Receivable, Held-for-Sale $ 15,000,000 $ 0
v3.26.1
Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2026
Dec. 31, 2025
Preferred Stock, Par or Stated Value Per Share $ 1.00 $ 1.00
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
v3.26.1
Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Interest and Dividend Income, Operating [Abstract]        
Interest and Fee Income, Loans and Leases $ 506,528 $ 447,781 $ 933,516 $ 881,080
Interest and Dividend Income, Securities, by Taxable Status [Abstract]        
Interest Income, Securities, Operating, Taxable 88,347 71,174 164,023 140,962
Interest Income, Securities, Operating, Tax Exempt 13,725 13,902 27,463 27,858
Other Interest and Dividend Income 14,694 12,679 26,335 21,921
Interest and Dividend Income, Operating, Total 623,294 545,536 1,151,337 1,071,821
Interest Expense, Operating and Nonoperating [Abstract]        
Interest Expense, Deposits 203,765 197,656 379,038 406,796
Interest Expense, Federal Funds Purchased and Securities Sold under Agreements to Repurchase 4,085 2,004 7,818 5,626
Interest Expense, Other Short-Term Borrowings 190 287 306 695
Interest on FHLB Funding 35,052 34,889 66,621 50,979
Interest Expense, Long-Term Debt 10,163 10,700 20,326 21,785
Interest Expense, Operating and Nonoperating, Total 253,255 245,536 474,109 485,881
Interest Income (Expense), Operating, Total 370,039 300,000 677,228 585,940
Provision for Loan, Lease, and Other Losses 19,388 17,996 30,389 30,999
Interest Income (Expense), after Provision for Loan Loss, Total 350,651 282,004 646,839 554,941
Noninterest Income [Abstract]        
Capital Market Fees Net 7,476 5,765 14,018 10,110
Fees and Commissions, Mortgage Banking and Servicing 2,777 4,213 8,888 8,035
Gain (Loss) on Sale of Mortgage Loans 0 0 0 (6,976)
Bank Owned Life Insurance Income 4,615 4,135 8,430 9,339
Gain (Loss) on Disposition of Assets 789 (1,735) 1,629 (2,613)
Debt Securities, Available-for-Sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment 35 7 6 11
Noninterest Income, Other Operating Income 2,707 2,226 5,571 4,477
Noninterest Income, Total 80,398 66,977 156,256 125,754
Noninterest Expense [Abstract]        
Labor and Related Expense 161,168 126,994 296,341 250,890
Information Technology and Data Processing 32,867 26,508 62,603 53,646
Occupancy, Net 14,091 12,644 27,817 28,025
Marketing and Advertising Expense 8,548 7,748 16,374 14,134
Equipment Expense 5,423 4,494 11,033 9,021
Professional Fees 17,454 6,674 24,176 12,757
Payments of Financing Costs 1,552 2,705 3,259 5,299
Federal Deposit Insurance Corporation Premium Expense 10,595 9,708 19,432 20,144
Amortization of Intangible Assets 6,894 2,203 9,096 4,405
Other Noninterest Expense 13,290 9,674 20,914 21,648
Noninterest Expense, Total 271,882 209,352 491,045 419,971
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total 159,167 139,629 312,050 260,724
Income Tax Expense (Benefit) 35,603 28,399 68,850 47,808
Net Income (Loss) Attributable to Parent, Total 123,564 111,230 243,200 212,916
Preferred Stock Dividends and Other Adjustments 2,875 2,875 5,750 5,750
Net Income (Loss) Available to Common Stockholders, Basic, Total $ 120,689 $ 108,355 $ 237,450 $ 207,166
Earnings Per Share [Abstract]        
Earnings Per Share, Basic $ 0.64 $ 0.65 $ 1.34 $ 1.25
Earnings Per Share, Diluted $ 0.63 $ 0.65 $ 1.33 $ 1.24
Weighted Average Number of Shares Outstanding, Diluted [Abstract]        
Weighted Average Number of Shares Outstanding, Basic 188,084 164,936 176,654 165,081
Weighted Average Number of Shares Outstanding, Diluted 189,899 166,343 178,402 166,506
Fiduciary and Trust [Member]        
Noninterest Income [Abstract]        
Noninterest Income In Scope of Topic 606 $ 26,217 $ 23,025 $ 51,435 $ 45,522
Deposit Account [Member]        
Noninterest Income [Abstract]        
Noninterest Income In Scope of Topic 606 15,863 13,147 29,916 25,961
Credit and Debit Card [Member]        
Noninterest Income [Abstract]        
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606 14,161 11,200 25,740 21,642
Financial Service, Other [Member]        
Noninterest Income [Abstract]        
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606 $ 5,758 $ 4,995 $ 10,623 $ 10,245
v3.26.1
Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Statement of Comprehensive Income [Abstract]        
Net Income (Loss) Attributable to Parent $ 123,564 $ 111,230 $ 243,200 $ 212,916
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract]        
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax (36,846) 21,317 (73,377) 53,149
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities 1,901 2,059 3,590 3,986
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax 8,717 (5,830) 17,407 (14,251)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax, Total (26,228) 17,545 (52,380) 42,884
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (6,506) 1,264 (14,418) 8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (597) 1,437 (1,343) 2,555
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax (1,709) 650 (3,792) 2,668
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax (8,812) 3,352 (19,553) 13,755
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax (63) (63) (126) (126)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax 0 0 0 4,770
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax 0 (4) 0 (8)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax 15 17 31 (1,157)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total (48) (50) (95) 3,480
Other Comprehensive Income (Loss), Net of Tax, Total (35,088) 20,847 (72,027) 60,119
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ 88,476 $ 132,076 $ 171,173 $ 273,035
v3.26.1
Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Board Authorized Purchase Program [Member]
Series E Preferred Stock
Series F Preferred Stock
Performance/Service Based RSAs, RSA,
Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Treasury Stock, Common
Treasury Stock, Common
Board Authorized Purchase Program [Member]
Treasury Stock, Common
Performance/Service Based RSAs, RSA,
Beginning balance at Dec. 31, 2024 $ 4,605,562         $ 194,112 $ 1,890 $ 2,047,349 $ 2,919,252 $ (74,416) $ (482,626)    
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]                          
Net Income (Loss) Attributable to Parent 101,687               101,687        
Other Comprehensive Income (Loss), Net of Tax 39,272                 39,272      
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total 140,959                        
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]                          
Stock Issued During Period, Value, New Issues (52)             (52)          
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture 2,192             (14,297)     16,489    
Treasury Stock, Value, Acquired, Cost Method   $ (22,292)     $ (5,816)             $ (22,292) $ (5,816)
Dividends [Abstract]                          
Dividends, Common Stock, Cash (38,538)               (38,538)        
Dividends, Preferred Stock, Cash (2,875)               (2,875)        
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition $ 7,419             7,419          
Common Stock, Dividends, Per Share, Cash Paid $ 0.23                        
Preferred Stock, Dividends, Per Share, Cash Paid     $ 0.3671875 $ 0.3515625                  
Ending balance at Mar. 31, 2025 $ 4,686,558         194,112 1,890 2,040,419 2,979,526 (35,144) (494,246)    
Beginning balance at Dec. 31, 2024 4,605,562         194,112 1,890 2,047,349 2,919,252 (74,416) (482,626)    
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]                          
Net Income (Loss) Attributable to Parent 212,916               212,916        
Other Comprehensive Income (Loss), Net of Tax 60,119                 60,119      
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total 273,035                        
Ending balance at Jun. 30, 2025 4,780,781         194,112 1,890 2,044,481 3,049,383 (14,297) (494,788)    
Beginning balance at Mar. 31, 2025 4,686,558         194,112 1,890 2,040,419 2,979,526 (35,144) (494,246)    
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]                          
Net Income (Loss) Attributable to Parent 111,230               111,230        
Other Comprehensive Income (Loss), Net of Tax 20,847                 20,847      
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total 132,076                        
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]                          
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture 94             543     (449)    
Treasury Stock, Value, Acquired, Cost Method         (93)               (93)
Dividends [Abstract]                          
Dividends, Common Stock, Cash (38,498)               (38,498)        
Dividends, Preferred Stock, Cash (2,875)               (2,875)        
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition $ 3,518             3,518          
Common Stock, Dividends, Per Share, Cash Paid $ 0.23                        
Preferred Stock, Dividends, Per Share, Cash Paid     0.3671875 0.3515625                  
Ending balance at Jun. 30, 2025 $ 4,780,781         194,112 1,890 2,044,481 3,049,383 (14,297) (494,788)    
Beginning balance at Dec. 31, 2025 4,975,347         194,112 1,890 2,050,410 3,226,756 (7,566) (490,255)    
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]                          
Net Income (Loss) Attributable to Parent 119,635               119,635        
Other Comprehensive Income (Loss), Net of Tax (36,939)                 (36,939)      
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total 82,696                        
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]                          
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture 7,121             (5,126)     12,247    
Treasury Stock, Value, Acquired, Cost Method   $ (25,202)     (6,377)             $ (25,202) (6,377)
Dividends [Abstract]                          
Dividends, Common Stock, Cash (40,058)               (40,058)        
Dividends, Preferred Stock, Cash (2,875)               (2,875)        
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition $ 7,220             7,220          
Common Stock, Dividends, Per Share, Cash Paid $ 0.24                        
Preferred Stock, Dividends, Per Share, Cash Paid     0.3671875 0.3515625                  
Ending balance at Mar. 31, 2026 $ 4,997,872         194,112 1,890 2,052,504 3,303,458 (44,505) (509,587)    
Beginning balance at Dec. 31, 2025 4,975,347         194,112 1,890 2,050,410 3,226,756 (7,566) (490,255)    
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]                          
Net Income (Loss) Attributable to Parent 243,200               243,200        
Other Comprehensive Income (Loss), Net of Tax (72,027)                 (72,027)      
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total 171,173                        
Ending balance at Jun. 30, 2026 5,638,123         194,112 2,120 2,648,846 3,378,406 (79,593) (505,768)    
Beginning balance at Mar. 31, 2026 4,997,872         194,112 1,890 2,052,504 3,303,458 (44,505) (509,587)    
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]                          
Net Income (Loss) Attributable to Parent 123,564               123,564        
Other Comprehensive Income (Loss), Net of Tax (35,088)                 (35,088)      
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total 88,476                        
Stock Issued During Period, Value, Acquisitions 594,144           230 593,914          
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]                          
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture 3,112             (1,360)     4,472    
Treasury Stock, Value, Acquired, Cost Method         $ (653)               $ (653)
Dividends [Abstract]                          
Dividends, Common Stock, Cash (45,741)               (45,741)        
Dividends, Preferred Stock, Cash (2,875)               (2,875)        
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition $ 3,788             3,788          
Common Stock, Dividends, Per Share, Cash Paid $ 0.24                        
Preferred Stock, Dividends, Per Share, Cash Paid     $ 0.3671875 $ 0.3515625                  
Ending balance at Jun. 30, 2026 $ 5,638,123         $ 194,112 $ 2,120 $ 2,648,846 $ 3,378,406 $ (79,593) $ (505,768)    
v3.26.1
Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares
 3 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Series E Preferred Stock        
Preferred Stock, Dividends, Per Share, Cash Paid $ 0.3671875 $ 0.3671875 $ 0.3671875 $ 0.3671875
Series F Preferred Stock        
Preferred Stock, Dividends, Per Share, Cash Paid $ 0.3515625 $ 0.3515625 $ 0.3515625 $ 0.3515625
v3.26.1
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]              
Net Income (Loss) $ 123,564 $ 119,635 $ 111,230 $ 101,687 $ 243,200 $ 212,916  
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]              
Provision for Loan, Lease, and Other Losses 19,388   17,996   30,389 30,999  
Depreciation         24,824 26,006  
Mortgage Servicing Rights (MSR) Impairment (Recovery)         (86) 1,632  
Amortization of Intangible Assets 6,894   2,203   9,096 4,405  
Accretion (Amortization) of Discounts and Premiums, Investments         15,062 18,278  
Other Depreciation and Amortization         17,146 17,058  
Marketable Securities, Gain (Loss)         4 0  
Gain (Loss) on Disposition of Assets (789)   1,735   (1,629) 2,613  
(Gain) loss on mortgage banking activities, net         911 (683)  
Gain (Loss) on Sale of Mortgage Loans 0   0   0 6,976  
Increase (Decrease) in Obligation, Pension Benefits         (12,308) (12,372)  
Payment for Origination and Purchase, Loan, Held-for-Sale         (367,223) (273,947)  
Proceeds from Sale, Loan, Mortgage, Held-for-Sale         352,641 238,557  
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]              
Increase (Decrease) in Accrued Interest Receivable, Net         (898) (854)  
Decrease in net income tax position         34,744 49,335  
Increase (Decrease) in Interest Payable, Net         1,610 (3,681)  
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities         (53,437) (11,116)  
Increase (Decrease) in Derivative Assets and Liabilities         16,624 (50,962)  
Increase (Decrease) in Other Noncurrent Assets         (8,430) (9,339)  
Increase (Decrease) in Other Operating Assets and Liabilities, Net         40,720 (6,184)  
Net Cash Provided by (Used in) Operating Activities, Total         342,960 239,637  
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]              
Payments for (Proceeds from) Loans and Leases         (1,593,324) (865,086)  
Payment for Investing Activity [Abstract]              
Payments to Acquire Debt Securities, Available-for-Sale         (1,815,271) (910,262)  
Payments to Acquire Held-to-Maturity Securities         0 (994)  
Payments to Acquire Federal Home Loan Bank Stock         (130,630) (177,712)  
Proceeds from Investing Activity [Abstract]              
Proceeds from Sale of Debt Securities, Available-for-Sale         995,830 0  
Proceeds from Sale of Held-to-Maturity Securities         1,221 0  
Proceeds from Sale of Federal Home Loan Bank Stock         53,765 76,535  
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale         772,971 504,380  
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities         92,018 69,279  
Proceeds from Sale and Maturity of Other Investments         9,756 7,813  
Proceeds from Sale of Mortgage Portfolio         0 564,375  
Payments for (Proceeds from) Productive Assets         (21,046) (18,046)  
Net Change in Tax Credit Investments         (12,499) (14,903)  
Net cash received from the American National acquisition         220,898 0  
Net Cash Provided by (Used in) Investing Activities, Total         (1,426,311) (764,621)  
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]              
Increase (Decrease) in Deposits         (166,364) (500,869)  
Proceeds from (Repayments of) Short-Term Debt         207,090 (394,784)  
Increase (Decrease) in Loans from Federal Home Loan Banks         1,417,750 2,220,000  
Payments of FHLBank Borrowings, Financing Activities         (151,007) (400,065)  
Proceeds from FHLBank Borrowings, Financing Activities         0 200,000  
Finance Lease, Principal Payments         0 (45)  
Repayments of Senior Debt         0 (250,000)  
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised         10,233 2,286  
Payments of Ordinary Dividends, Common Stock         (85,799) (77,036)  
Payments of Ordinary Dividends, Preferred Stock and Preference Stock         (5,750) (5,750)  
Proceeds from (Payment for) Other Financing Activity         0 (52)  
Net Cash Provided by (Used in) Financing Activities, Total         1,193,921 765,485  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total         110,570 240,501  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance   1,720,221   1,019,604 1,720,221 1,019,604 $ 1,019,604
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance 1,830,791   1,260,105   1,830,791 1,260,105 1,720,221
Supplemental Cash Flow Information [Abstract]              
Interest Paid, Excluding Capitalized Interest, Operating Activity         469,929 488,277  
Stock Issued         594,144 0  
Fair Value of Assets Acquired         5,228,544 0  
Liabilities Assumed         4,634,400 0  
Servicing Asset at Fair Value, Additions         6,159   $ 8,716
Board Authorized Purchase Program [Member]              
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]              
Payments for Repurchase of Common Stock         (25,202) (22,292)  
Performance/Service Based RSAs, RSA,              
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]              
Payments for Repurchase of Common Stock         (7,030) (5,910)  
Retained Earnings [Member]              
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]              
Net Income (Loss) $ 123,564 $ 119,635 $ 111,230 $ 101,687 $ 243,200 $ 212,916  
v3.26.1
Basis of Presentation
 6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation Basis of Presentation
In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the financial position, results of operations and comprehensive income, changes in stockholders’ equity, and cash flows of the Corporation for the periods presented, and all such adjustments are of a normal recurring nature. The consolidated financial statements include the accounts of all subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full year.
In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. The determination of the ACLL is particularly susceptible to significant change. Management has evaluated subsequent events for potential recognition or disclosure.
Within the tables presented, certain columns and rows may not recalculate due to the use of rounded numbers for disclosure purposes.
v3.26.1
Business Combinations, Asset Acquisitions, Transaction between Entities under Common Control, and Joint Venture Formation
 6 Months Ended
Jun. 30, 2026
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]  
Business Combination Business Combinations On April 1, 2026, the Corporation completed its previously announced acquisition of American National pursuant to the terms of the Merger Agreement by and between the Corporation and American National.
Pursuant to the Merger Agreement, (i) American National merged with and into Associated Banc-Corp, with Associated Banc-Corp continuing as the surviving corporation, and (ii) immediately following such merger, American National Bank, a national banking association and wholly owned subsidiary of American National, merged with and into the Bank, with the Bank continuing as the surviving bank.
At the effective time of the merger, 100% of the outstanding shares of voting common stock and non-voting common stock of American National outstanding immediately prior to the effective time of the merger, other than certain shares held by the Corporation or American National, were converted into the right to receive an aggregate 22,975,382 shares of common stock of the Corporation. This represented 36.250 shares of the Corporation's common stock for each share of outstanding common stock of American National, with cash paid in lieu of fractional shares. Total consideration for the acquisition was $594.1 million valued at the acquisition date fair value of $25.86 per share.
American National operated 33 branches across Nebraska, Minnesota and Iowa, with a concentration in the Greater Omaha and Minneapolis / St. Paul metro markets. As a result of the acquisition, the Corporation increased its deposit market share and will deliver its products and services to an expanded client base across attractive Midwest markets.
The acquisition of American National has been accounted for as a business combination using the acquisition method of accounting in accordance with FASB ASC Topic 805, Business Combinations. Accordingly, assets acquired and liabilities assumed were recorded at fair value as of the acquisition date. Fair value estimates related to the assets and liabilities from American National are subject to adjustment for up to one year after the closing date of the acquisition as additional information becomes available. The purchase consideration allocation is considered preliminary as certain estimates related to the assets acquired and liabilities assumed are subject to continuing refinement. Valuations subject to refinement include, but are not limited to, loans, certain deposits, certain other assets, and the core deposit intangible asset.
The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the effective date of the American National acquisition.
(in thousands)April 1, 2026
Total Consideration$594,144 
Assets
Cash and cash equivalents$220,898 
Investment securities989,925 
Loans, net3,716,472 
Other intangible assets(a)
103,200 
Other assets155,960 
Total assets$5,186,455 
Liabilities
Deposits$4,544,700 
Other liabilities89,700 
Total liabilities$4,634,400 
Fair value of net assets acquired$552,055 
Goodwill$42,089 
(a) Core deposit intangibles
The goodwill arising from the acquisition consists largely of the synergies and economies of scale expected from combining the operations of the Corporation with the former operations of American National. None of the goodwill is deductible for income tax purposes as the acquisition was accounted for as a tax-free exchange.
The Corporation engaged an independent, third-party valuation specialist to assist in the valuation of certain assets acquired and liabilities assumed from the business combination. The following valuation techniques were used in the valuation:

Investment securities: The fair value of AFS investment securities and equity securities was determined utilizing quoted prices in an active market, if available, or an external third party broker opinion of the market value.

Loans, net: Fair values of loans were based on a discounted cash flow methodology that considered factors including the type of loan, related collateral, credit quality status, fixed or variable interest rate, term of loan, amortization status and current discount rates. For the non-credit (interest and liquidity) premium, loans were grouped together according to similar characteristics when applying various valuation techniques. For the credit discount, loans were also grouped based on whether they had more than insignificant deterioration in credit since origination. Purchased loans and leases that reflect a more-than-insignificant deterioration of credit from origination are considered purchase credit deteriorated (PCD) assets. All other loans acquired were deemed purchased seasoned loans (non-PCD). The initial estimate of expected credit losses, excluding credit card loans, was recognized in the ACLL on the date of acquisition using the same methodology as other loans and leases held-for-investment.

The following table includes the fair value and unpaid principal balance of the acquired loans and leases:

(in thousands)Unpaid principal balancePremium
(Discount)		Loans and leasesAllowance for credit losses on loansLoans and leases, net
Non-PCD loans$3,185,647 $2,692 $3,188,339 $(28,263)$3,160,076 
PCD Loans615,403 (19,495)595,908 (39,512)556,396 
Total$3,801,050 $(16,803)$3,784,247 $(67,775)$3,716,472 
Core Deposit Intangibles: This intangible asset represents the value of the relationships with deposit customers. The fair value was estimated based on a discounted cash flow methodology that gave appropriate consideration to expected customer attrition rates, net maintenance cost of the deposit base, alternative cost of funds, and the interest costs associated with customer deposits. The CDIs will be amortized utilizing the sum of years digits basis.
Time Deposits: The fair value for time deposits are estimated using a discounted cash flow calculation that applies interest rates currently being offered to the contractual interest rates on such time deposits.
The Corporation's operating results include operating results from American National for the three months ended June 30, 2026. Due to the integration of operating activities into those of the Corporation, bifurcation and reporting of revenues and net income from the former American National operations is impracticable. In addition, such amounts would require significant estimates related to the proper allocation of merger cost savings that cannot be objectively made. The following table presents merger related costs, and the line item that these costs are included in on the consolidated statement of income, for the three and six months ended June 30, 2026. Additional transaction and integration costs will be expensed in future periods as incurred.
(in thousands)Three Months Ended June 30, 2026Six Months Ended Jun 30, 2026
Personnel$13,364 $13,364 
Technology781 781 
Occupancy23 103 
Business development and advertising417 654 
Equipment98 98 
Legal and professional9,569 10,253 
Other217 223 
Total$24,469 $25,476 
Pro Forma Financial Information
The following unaudited pro forma summary presents consolidated information of the Corporation as if the American National acquisition had occurred on January 1, 2025. The amounts do not reflect anticipated operating cost savings, revenue enhancements, or other synergies expected to result from the acquisition. Actual results may differ from the unaudited pro forma information presented.
Three Months Ended Jun 30,Six Months Ended Jun 30,
(Unaudited) (in thousands)2026202520262025
Net interest income and noninterest income$447,151 $415,810 $881,852 $807,328 
Net income141,691 120,532 263,217 212,961 
The pro forma adjustments include the effect of excluding acquisition-related expenses of $25.5 million for the six months ended June 30, 2026 and included such expenses in the first half of 2025. These adjustments also include adjusting amortization and accretion of fair value marks on acquired loans, investments, deposits, intangibles, other assets/liabilities, and the effect of income taxes.
v3.26.1
Summary of Significant Accounting Policies
 6 Months Ended
Jun. 30, 2026
Accounting Standards Update and Change in Accounting Principle [Abstract]  
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
The accounting and reporting policies of the Corporation conform to U.S. GAAP and to general practice within the financial services industry. A discussion of these policies can be found in Note 1 Summary of Significant Accounting Policies included in the Corporation’s 2025 Annual Report on Form 10-K, except for new accounting pronouncements adopted, as discussed below.
New Accounting Pronouncements Adopted
StandardDescriptionDate of AdoptionEffect on Financial Statements
ASU 2025-08 Financial
Instruments-Credit Losses
(Topic 326)		The amendments in this update expand the gross-up
approach for initial recognition and measurement of
acquired financial assets to purchased seasoned loans.		Early adopted effective April 1, 2026 on a prospective basis, as permitted by the standardThe Corporation early adopted this standard and applied it in the purchase accounting for the acquisition of American National. The ASU expands the gross-up approach to certain acquired non-PCD loans that qualify as purchased seasoned loans, including loans acquired in a business combination, resulting in the acquisition-date allowance for credit losses being added to the loans’ initial amortized cost basis rather than recognized as a Day 1 provision for credit losses. Refer to Note 3 for additional information.
Future Accounting Pronouncements
The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review.
StandardDescriptionDate of Anticipated AdoptionEffect on Financial Statements
ASU 2024-03 Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40)The amendments in this update require a public business entity to disclose specific information about certain costs and expenses in the notes to its financial statements for interim and annual reporting periods. The objective of the disclosure requirements is to provide disaggregated information about a public business entity's expenses to help investors (a) better understand the entity's performance, (b) better assess the entity's prospects for future cash flows, and (c) compare an entity's performance over time and with that of other entities. Annual period ending December 31, 2027 and subsequent interim periodsThe Corporation is currently evaluating the impact on its disclosures.
ASU 2025-06 Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)The amendments in this update simplify the capitalization guidance by removing all references to prescriptive and sequential software development stages to align with the shift to incremental and iterative software development methods.Interim period ending March 31, 2028 and subsequent periodsThe Corporation is currently evaluating the impact on its disclosures.
v3.26.1
Earnings Per Common Share
 6 Months Ended
Jun. 30, 2026
Earnings Per Share [Abstract]  
Earnings Per Common Share Earnings Per Common Share
Earnings per common share are calculated utilizing the two-class method. Basic earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock awards). Presented below are the calculations for basic and diluted earnings per common share:
Three Months Ended Jun 30,Six Months Ended Jun 30,
 (in thousands, except per share data)2026202520262025
Net income$123,564 $111,230 $243,200 $212,916 
Preferred stock dividends(2,875)(2,875)(5,750)(5,750)
Net income available to common equity120,689 108,355 237,450 207,166 
Common shareholder dividends(45,634)(38,304)(85,577)(76,636)
Unvested share-based payment awards(107)(194)(223)(399)
Undistributed earnings$74,948 $69,857 $151,650 $130,131 
Undistributed earnings allocated to common shareholders$74,769 $69,501 $151,203 $129,500 
Undistributed earnings allocated to unvested share-based payment awards179 356 447 630 
Undistributed earnings$74,948 $69,857 $151,650 $130,131 
Basic
Distributed earnings to common shareholders$45,634 $38,304 $85,577 $76,636 
Undistributed earnings allocated to common shareholders74,769 69,501 151,203 129,500 
Total common shareholders earnings, basic$120,403 $107,805 $236,780 $206,137 
Diluted
Distributed earnings to common shareholders$45,634 $38,304 $85,577 $76,636 
Undistributed earnings allocated to common shareholders74,769 69,501 151,203 129,500 
Total common shareholders earnings, diluted$120,403 $107,805 $236,780 $206,137 
Weighted average common shares outstanding188,084 164,936 176,654 165,081 
Effect of dilutive common stock awards1,815 1,407 1,748 1,425 
Diluted weighted average common shares outstanding189,899 166,343 178,402 166,506 
Basic earnings per common share$0.64 $0.65 $1.34 $1.25 
Diluted earnings per common share$0.63 $0.65 $1.33 $1.24 
Excluded from the earnings per common share calculations were nominal amounts and 1.4 million anti-dilutive common stock options for the three months ended June 30, 2026 and 2025, respectively, and nominal amounts and 1.2 million anti-dilutive common stock options for the six months ended June 30, 2026 and 2025, respectively.
v3.26.1
Stock-Based Compensation
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Stock-Based Compensation Stock-Based Compensation
The fair values of stock options and restricted stock are amortized as compensation expense on a straight-line basis over the vesting period of the grants. For colleagues who meet the definition of retirement eligible under the 2020 Incentive Compensation Plan and 2025 Equity Incentive Plan (collectively, the Incentive Plans), expenses related to stock options and restricted stock grants are fully recognized on the date the colleague meets the definition of normal or early retirement. Compensation expense recognized is included in personnel expense on the consolidated statements of income.
A summary of the Corporation’s stock option activity for the six months ended June 30, 2026 is presented below:
Stock Options
Shares(a)
Weighted Average
Exercise Price		Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value(a)
Outstanding at December 31, 20251,460 $22.71 2.52 years$4,483 
Exercised444 23.78 
Outstanding at June 30, 20261,016 $22.24 2.43 years$8,658 
Options Exercisable at June 30, 20261,016 $22.24 2.43 years$8,658 
(a) In thousands
Intrinsic value represents the amount by which the fair market value of the underlying stock exceeds the exercise price of the stock option. For the six months ended June 30, 2026, the intrinsic value of stock options exercised was $2.3 million, compared to $0.4 million for the six months ended June 30, 2025. All stock options were vested as of December 31, 2025.
The Corporation has issued service-based and performance-based restricted stock grants, in the form of awards and units, under the Incentive Plans. Service-based awards are contingent upon continued employment or meeting the requirements for retirement. Performance-based awards are based on performance goals determined by the Compensation and Benefits Committee of the Corporation's Board of Directors, with vesting ranging from a minimum of 0% to a maximum of 150% of the target award. Performance awards are valued utilizing a Monte Carlo simulation model to estimate fair value of the awards at the grant date.
The following table summarizes information about the Corporation’s restricted stock activity for the six months ended June 30, 2026:
Restricted Stock
Shares(a)
Weighted Average
Grant Date Fair Value
Outstanding at December 31, 20252,372 $22.02 
Granted897 26.49 
Vested849 22.01 
Forfeited47 24.42 
Outstanding at June 30, 20262,373 $23.66 
(a) In thousands
The Corporation amortizes the expense related to restricted stock awards as compensation expense over the vesting period specified in the grant's award agreement. Performance-based restricted stock granted during 2025 and 2026 will cliff-vest after the three year performance period has ended. Service-based restricted stock granted during 2025 and 2026 will generally vest ratably over a period of four years. Expense for restricted stock of $11.2 million and $11.3 million was recorded for the six months ended June 30, 2026 and June 30, 2025, respectively. Included in compensation expense for the accelerated vesting of restricted stock granted to retirement eligible colleagues was $4.2 million and $4.4 million of expense in the first six months of 2026 and 2025, respectively. The Corporation had $28.1 million of unrecognized compensation costs related to restricted stock at June 30, 2026 that are expected to be recognized over the remaining requisite service periods that extend through the first quarter of 2030.
The Corporation has the ability to issue shares from treasury or new shares upon the exercise of stock options or the granting of restricted stock. The Board of Directors has authorized management to repurchase shares of the Corporation’s common stock, to be made available for issuance in connection with the Corporation’s employee incentive plans and for other corporate purposes. The repurchase of shares, if any, will be based on market and investment opportunities, capital levels, growth prospects, and regulatory constraints. Such repurchases may occur from time to time in open market purchases, block transactions, private transactions, accelerated share repurchase programs, or similar facilities.
v3.26.1
Investment Securities
 6 Months Ended
Jun. 30, 2026
Investments, Debt and Equity Securities [Abstract]  
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investment Securities
Investment securities are designated as AFS, HTM, or equity on the consolidated balance sheets. The amortized cost and fair values of AFS and HTM securities at June 30, 2026 were as follows:
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)$7,342 $4 $(106)$7,240 
Residential mortgage-related securities:
FNMA/FHLMC142,709 815 (6,236)137,288 
GNMA5,518,890 2,481 (29,723)5,491,648 
Commercial mortgage-related securities:
FNMA/FHLMC414,880 — (4,659)410,221 
GNMA111,910 — (5,066)106,844 
Asset backed securities:
FFELP89,197 1 (986)88,212 
SBA120,221 387 (538)120,070 
Other debt securities(a)
6,750 — (1,687)5,063 
Total AFS investment securities$6,411,899 $3,688 $(49,001)$6,366,586 
HTM investment securities
U.S. Treasury securities$997 $5 $— $1,002 
Obligations of state and political subdivisions (municipal securities)1,591,681 1,797 (124,874)1,468,604 
Residential mortgage-related securities:
FNMA/FHLMC790,729 39 (130,031)660,737 
GNMA37,215 18 (2,607)34,626 
Private-label292,007 — (45,547)246,460 
Commercial mortgage-related securities:
FNMA/FHLMC757,723 — (113,423)644,300 
GNMA40,423 — (4,334)36,089 
Total HTM investment securities$3,510,775 $1,859 $(420,816)$3,091,818 
(a)Unrealized losses includes allowance for credit losses
The amortized cost and fair values of AFS and HTM securities at December 31, 2025 were as follows:
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)$3,063 $1 $(20)$3,044 
Residential mortgage-related securities:
FNMA/FHLMC134,142 1,214 (5,493)129,863 
GNMA5,000,015 40,067 (253)5,039,829 
Commercial mortgage-related securities:
FNMA/FHLMC17,959 — (1,001)16,958 
GNMA113,374 — (3,818)109,556 
Asset backed securities:
FFELP95,977 19 (950)95,046 
SBA283 — (14)269 
Other debt securities3,000 — (2)2,998 
Total AFS investment securities$5,367,813 $41,301 $(11,551)$5,397,563 
HTM investment securities
U.S. Treasury securities$996 $19 $— $1,015 
Obligations of state and political subdivisions (municipal securities)1,628,088 3,070 (123,856)1,507,302 
Residential mortgage-related securities:
FNMA/FHLMC823,630 165 (127,333)696,462 
GNMA39,123 82 (2,321)36,884 
Private-label302,817 — (43,990)258,827 
Commercial mortgage-related securities:
FNMA/FHLMC763,370 — (113,004)650,366 
GNMA44,552 152 (4,566)40,138 
 Total HTM investment securities$3,602,576 $3,488 $(415,070)$3,190,994 
Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The expected maturities of AFS and HTM securities at June 30, 2026, are shown below:
AFSHTM
(in thousands)Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Due in one year or less$3,750 $2,063 $820,235 $818,331 
Due after one year through five years7,739 7,655 825 779 
Due after five years through ten years— — 8,078 7,932 
Due after ten years2,603 2,585 763,540 642,564 
Total municipal, U.S. Treasury and other debt securities14,092 12,303 1,592,678 1,469,606 
Residential mortgage-related securities:
FNMA/FHLMC142,709 137,288 790,729 660,737 
GNMA5,518,890 5,491,648 37,215 34,626 
Private-label— — 292,007 246,460 
Commercial mortgage-related securities:
FNMA/FHLMC414,880 410,221 757,723 644,300 
GNMA111,910 106,844 40,423 36,089 
Asset backed securities:
FFELP 89,197 88,212 — — 
SBA120,221 120,070 — — 
Total investment securities$6,411,899 $6,366,586 $3,510,775 $3,091,818 
Ratio of fair value to amortized cost99.3 %88.1 %
The following table summarizes gross realized gains and losses on AFS securities, the gain or loss on sale and fair value adjustment of equity securities, and proceeds from the sale of AFS investment securities:
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Gross losses on HTM securities$— $— $(4)$— 
Fair value adjustment of equity securities35 7 10 11 
Investment securities (losses) gains, net$35 $7 $6 $11 
Investment securities with a carrying value of $1.0 billion at June 30, 2026 and $1.2 billion December 31, 2025, respectively, were pledged as required to secure certain deposits or for other purposes.
Accrued interest receivable on HTM securities totaled $17.2 million and $17.7 million at June 30, 2026 and December 31, 2025, respectively. Accrued interest receivable on AFS securities totaled $25.1 million and $23.0 million at June 30, 2026 and December 31, 2025, respectively. Accrued interest receivable on both HTM and AFS securities is included in interest receivable on the consolidated balance sheets.
The Corporation holds U.S. Treasury, municipal, and mortgage-related securities issued by the U.S. government or a GSE which are backed by the full faith and credit of the U.S. government and private-label residential mortgage-related securities that have credit enhancement which covers the first 16% of losses and, as a result, no allowance for credit losses has been recorded related to these securities.
There was a nominal allowance for credit losses on HTM securities at June 30, 2026 and $0.1 million at December 31, 2025, attributable entirely to the Corporation's municipal securities, included in HTM investment securities, net, at amortized cost on the consolidated balance sheets. The allowance for credit losses on AFS securities was $1.7 million at June 30, 2026 and zero at December 31, 2025, attributable to a corporate bond acquired through the recent acquisition of American National, included in other debt securities and AFS investment securities, net, at fair value on the consolidated balance sheets.

The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2026:
Less than 12 months12 months or moreTotal
(in thousands)Number
of
Securities		Unrealized
Losses		Fair
Value		Number
of
Securities		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)4 $(99)$4,176 1 $(7)$243 $(106)$4,419 
Residential mortgage-related securities:
FNMA/FHLMC34 (604)47,975 5 (5,632)44,189 (6,236)92,164 
GNMA236 (29,685)4,396,013 2 (38)1,901 (29,723)4,397,914 
Commercial mortgage-related securities:
FNMA/FHLMC11 (3,780)393,331 1 (879)16,889 (4,659)410,220 
GNMA— — — 15 (5,066)106,844 (5,066)106,844 
Asset backed securities:
FFELP2 (75)30,893 12 (911)51,501 (986)82,394 
SBA6 (526)89,501 2 (12)183 (538)89,684 
Other debt securities(a)
3 (1,687)4,062 — — — (1,687)4,062 
Total296 $(36,456)$4,965,951 38 $(12,545)$221,750 $(49,001)$5,187,701 
HTM investment securities
Obligations of state and political subdivisions (municipal securities)327 $(6,876)$500,662 407 $(117,998)$615,514 $(124,874)$1,116,176 
Residential mortgage-related securities:
FNMA/FHLMC15 (127)15,968 100 (129,904)637,637 (130,031)653,605 
GNMA4 (60)5,330 79 (2,547)26,571 (2,607)31,901 
Private-label— — — 18 (45,547)246,460 (45,547)246,460 
 Commercial mortgage-related securities:
FNMA/FHLMC2 (536)26,155 43 (112,887)618,145 (113,423)644,300 
GNMA— — — 13 (4,334)36,088 (4,334)36,088 
Total348 $(7,599)$548,115 660 $(413,217)$2,180,415 $(420,816)$2,728,530 
(a)Unrealized losses includes allowance for credit losses
For comparative purposes, the following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2025:
Less than 12 months12 months or moreTotal
(in thousands)Number
of
Securities		Unrealized
Losses		Fair
Value		Number
of
Securities		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)— $— $— 2 $(20)$863 $(20)$863 
Residential mortgage-related securities:
FNMA/FHLMC12 (95)14,155 12 (5,398)56,215 (5,493)70,370 
GNMA16 (232)143,734 3 (21)2,674 (253)146,408 
Commercial mortgage-related securities:
FNMA/FHLMC— — — 1 (1,001)16,958 (1,001)16,958 
GNMA— — — 15 (3,818)109,556 (3,818)109,556 
Asset backed securities:
FFELP2 (152)33,239 12 (798)55,565 (950)88,804 
SBA— — — 2 (14)231 (14)231 
Other debt securities2 (2)1,998 — — — (2)1,998 
Total32 $(481)$193,126 47 $(11,070)$242,062 $(11,551)$435,188 
HTM investment securities
Obligations of state and political subdivisions (municipal securities)81 $(2,978)$89,826 543 $(120,878)$842,485 $(123,856)$932,311 
Residential mortgage-related securities:
FNMA/FHLMC1 — 30 102 (127,333)676,915 (127,333)676,945 
GNMA— — — 80 (2,321)30,237 (2,321)30,237 
Private-label— — — 18 (43,990)258,827 (43,990)258,827 
Commercial mortgage-related securities:
FNMA/FHLMC2 (470)26,287 43 (112,534)624,079 (113,004)650,366 
GNMA— — — 13 (4,566)40,138 (4,566)40,138 
Total84 $(3,448)$116,143 799 $(411,622)$2,472,681 $(415,070)$2,588,824 
On a quarterly basis, the Corporation refreshes the credit quality of each HTM security. The Company monitors the credit quality of HTM securities through credit ratings provided by S&P and Moody’s. Investment grade securities are rated BBB- or higher by S&P, or Baa3 or higher by Moody’s, and are generally considered by the rating agencies and market participants to be of low credit risk. As of June 30, 2026 and December 31, 2025, the Corporation's HTM portfolio contained all investment grade securities except for securities that were not rated which were individually reviewed noting no credit quality issues.
Based on the Corporation’s evaluation, management does not believe any unrealized losses at June 30, 2026 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions, except as disclosed above. As of June 30, 2026, the Corporation does not intend to sell, nor does it believe that it will be required to sell, the securities in an unrealized loss position before recovery of their amortized cost basis.
Regulatory stocks: The Corporation had FHLB stock of $215.0 million and $154.4 million at June 30, 2026 and December 31, 2025, respectively. The Corporation had Federal Reserve Bank stock of $114.4 million and $98.1 million at June 30, 2026 and December 31, 2025, respectively.
Accrued interest receivable on FHLB stock totaled $4.1 million at June 30, 2026 and $2.8 million at December 31, 2025. There was no accrued interest receivable on Federal Reserve Bank Stock at both June 30, 2026 and December 31, 2025. Accrued interest receivable on both FHLB stock and Federal Reserve Bank stock is included in interest receivable on the consolidated balance sheets.
Equity Securities
Equity securities with readily determinable fair values: The Corporation's portfolio of equity securities with readily determinable fair values is primarily comprised of mutual funds. The Corporation had equity securities with readily determinable fair values of $15.0 million and $11.1 million at June 30, 2026 and December 31, 2025, respectively.
Equity securities without readily determinable fair values: The Corporation's portfolio of equity securities without readily determinable fair values primarily consists of an investment in a private loan fund. The Corporation had equity securities without readily determinable fair values carried at $15.0 million at both June 30, 2026 and December 31, 2025
v3.26.1
Loans
 6 Months Ended
Jun. 30, 2026
Receivables [Abstract]  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Loans
The period end loan composition was as follows:
(in thousands)Jun 30, 2026Dec 31, 2025
Commercial and industrial$13,750,175 $11,799,757 
Commercial real estate — owner occupied1,575,445 1,186,324 
Commercial and business lending15,325,620 12,986,081 
Commercial real estate — investor6,492,950 5,246,030 
Real estate construction2,546,186 1,994,642 
Commercial real estate lending9,039,136 7,240,672 
Total commercial24,364,756 20,226,753 
Residential mortgage6,808,398 6,793,957 
Auto finance4,044,416 3,106,498 
Home equity826,343 713,271 
Other consumer423,127 323,135 
Total consumer12,102,284 10,936,861 
Total loans$36,467,040 $31,163,614 
Accrued interest receivable on loans totaled $135.4 million at June 30, 2026 and $117.6 million at December 31, 2025, and is included in interest receivable on the consolidated balance sheets. The amount of accrued interest reversed was $0.4 million for the three months ended June 30, 2026 and $0.8 million for the six months ended June 30, 2026, compared to $0.5 million for the three months ended June 30, 2025 and $1.1 million for the six months ended June 30, 2025.
The following table presents loans by credit quality indicator by origination year at June 30, 2026:
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost BasisYTD 20262025202420232022PriorTotal
Commercial and industrial:
Risk rating:
Pass$3,199 $2,741,443 $2,328,388 $3,787,950 $1,722,490 $982,648 $840,913 $738,339 $13,142,171 
Special mention— 22,708 626 26,761 24,508 9,346 5,458 72,581 161,988 
Substandard668 94,753 38,835 33,522 32,732 12,846 130,614 58,326 401,628 
Nonaccrual20 635 2,160 27,179 4,617 4,506 474 4,817 44,388 
Commercial and industrial$3,887 $2,859,539 $2,370,009 $3,875,412 $1,784,347 $1,009,346 $977,459 $874,063 $13,750,175 
Commercial real estate - owner occupied:
Risk rating:
Pass$— $182,249 $129,676 $247,821 $199,462 $146,763 $197,576 $380,833 $1,484,380 
Special mention— 1,363 — 4,713 5,016 2,059 90 5,980 19,221 
Substandard— 11,913 1,886 2,097 14,611 14,693 47 23,342 68,589 
Nonaccrual— — — 1,797 — — 524 934 3,255 
Commercial real estate - owner occupied$— $195,525 $131,562 $256,428 $219,089 $163,515 $198,237 $411,089 $1,575,445 
Commercial and business lending:
Risk rating:
Pass$3,199 $2,923,692 $2,458,064 $4,035,771 $1,921,952 $1,129,411 $1,038,489 $1,119,172 $14,626,551 
Special mention— 24,071 626 31,474 29,524 11,405 5,548 78,561 181,209 
Substandard668 106,666 40,721 35,619 47,343 27,539 130,661 81,668 470,217 
Nonaccrual20 635 2,160 28,976 4,617 4,506 998 5,751 47,643 
Commercial and business lending$3,887 $3,055,064 $2,501,571 $4,131,840 $2,003,436 $1,172,861 $1,175,696 $1,285,152 $15,325,620 
Commercial real estate - investor:
Risk rating:
Pass$— $695,209 $1,061,877 $1,762,223 $662,819 $438,221 $679,245 $844,791 $6,144,385 
Special mention— 633 33,369 5,553 3,066 48,292 58,136 29,885 178,934 
Substandard— 21,867 10,855 12,186 24,000 5,783 54,229 29,527 158,447 
Nonaccrual— 698 — 793 — — 7,914 1,779 11,184 
Commercial real estate - investor$— $718,407 $1,106,101 $1,780,755 $689,885 $492,296 $799,524 $905,982 $6,492,950 
Real estate construction:
Risk rating:
Pass$— $219,286 $161,036 $541,782 $872,017 $152,821 $3,414 $6,963 $1,957,319 
Special mention— 2,663 — — 15,405 — 75,656 — 93,724 
Substandard— 25,497 80,123 105,451 7,685 34,493 238,920 — 492,169 
Nonaccrual— 2,913 — — — 38 — 23 2,974 
Real estate construction$— $250,359 $241,159 $647,233 $895,107 $187,352 $317,990 $6,986 $2,546,186 
Commercial real estate lending:
Risk rating:
Pass$— $914,495 $1,222,913 $2,304,005 $1,534,836 $591,042 $682,659 $851,754 $8,101,704 
Special mention— 3,296 33,369 5,553 18,471 48,292 133,792 29,885 272,658 
Substandard— 47,364 90,978 117,637 31,685 40,276 293,149 29,527 650,616 
Nonaccrual— 3,611 — 793 — 38 7,914 1,802 14,158 
Commercial real estate lending$— $968,766 $1,347,260 $2,427,988 $1,584,992 $679,648 $1,117,514 $912,968 $9,039,136 
Total commercial:
Risk rating:
Pass$3,199 $3,838,187 $3,680,977 $6,339,776 $3,456,788 $1,720,453 $1,721,148 $1,970,926 $22,728,255 
Special mention— 27,367 33,995 37,027 47,995 59,697 139,340 108,446 453,867 
Substandard668 154,030 131,699 153,256 79,028 67,815 423,810 111,195 1,120,833 
Nonaccrual20 4,246 2,160 29,769 4,617 4,544 8,912 7,553 61,801 
Total commercial$3,887 $4,023,830 $3,848,831 $6,559,828 $3,588,428 $1,852,509 $2,293,210 $2,198,120 $24,364,756 
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost BasisYTD 20262025202420232022PriorTotal
Residential mortgage:
Risk rating:
Pass$— $— $176,272 $309,720 $254,049 $438,829 $1,461,192 $4,090,505 $6,730,567 
Special mention— — — 315 — — — 188 503 
Substandard— — 5,355 — 572 366 454 246 6,993 
Nonaccrual— — — 2,054 4,408 7,680 11,041 45,152 70,335 
Residential mortgage$— $— $181,627 $312,089 $259,029 $446,875 $1,472,687 $4,136,091 $6,808,398 
Auto finance:
Risk rating:
Pass$— $— $856,927 $1,398,649 $867,078 $498,862 $351,555 $57,048 $4,030,119 
Special mention— — 84 1,032 581 868 625 134 3,324 
Nonaccrual— — 393 1,686 2,058 3,351 3,083 402 10,973 
Auto finance$— $— $857,404 $1,401,367 $869,717 $503,081 $355,263 $57,584 $4,044,416 
Home equity:
Risk rating:
Pass$11,561 $726,750 $1,158 $5,253 $3,937 $4,886 $21,268 $55,324 $818,576 
Special mention78 102 — — 130 — 39 914 1,185 
Nonaccrual272 317 — 102 151 159 1,025 4,828 6,582 
Home equity$11,911 $727,169 $1,158 $5,355 $4,218 $5,045 $22,332 $61,066 $826,343 
Other consumer:
Risk rating:
Pass$84 $260,894 $36,667 $44,583 $18,197 $10,311 $5,627 $43,888 $420,167 
Special mention1 885 — 17 62 47 45 9 1,065 
Substandard— 1,633 — — — — — — 1,633 
Nonaccrual— 47 — 60 47 41 53 14 262 
Other consumer$85 $263,459 $36,667 $44,660 $18,306 $10,399 $5,725 $43,911 $423,127 
Total consumer:
Risk rating:
Pass$11,645 $987,644 $1,071,024 $1,758,205 $1,143,261 $952,888 $1,839,642 $4,246,765 $11,999,429 
Special mention79 987 84 1,364 773 915 709 1,245 6,077 
Substandard— 1,633 5,355 — 572 366 454 246 8,626 
Nonaccrual272 364 393 3,902 6,664 11,231 15,202 50,396 88,152 
Total consumer$11,996 $990,628 $1,076,856 $1,763,471 $1,151,270 $965,400 $1,856,007 $4,298,652 $12,102,284 
Total loans:
Risk rating:
Pass$14,844 $4,825,831 $4,752,001 $8,097,981 $4,600,049 $2,673,341 $3,560,790 $6,217,691 $34,727,684 
Special mention79 28,354 34,079 38,391 48,768 60,612 140,049 109,691 459,944 
Substandard668 155,663 137,054 153,256 79,600 68,181 424,264 111,441 1,129,459 
Nonaccrual292 4,610 2,553 33,671 11,281 15,775 24,114 57,949 149,953 
Total loans$15,883 $5,014,458 $4,925,687 $8,323,299 $4,739,698 $2,817,909 $4,149,217 $6,496,772 $36,467,040 
(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.
The following table presents loans by credit quality indicator by origination year at December 31, 2025:
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost Basis20252024202320222021PriorTotal
Commercial and industrial:
Risk rating:
Pass$503 $1,920,351 $3,886,880 $2,097,760 $1,133,873 $1,238,941 $521,793 $471,834 $11,271,432 
Special mention— 11,139 3,024 311 13,774 5,849 24,971 293 59,361 
Substandard7,290 65,451 60,593 78,773 22,126 162,841 70,231 1,771 461,786 
Nonaccrual1,473 — 25 7,153 — — — — 7,178 
Commercial and industrial$9,266 $1,996,941 $3,950,522 $2,183,997 $1,169,773 $1,407,631 $616,995 $473,898 $11,799,757 
Commercial real estate - owner occupied:
Risk rating:
Pass$— $2,957 $241,141 $180,867 $141,254 $167,496 $157,837 $201,588 $1,093,140 
Special mention— — — 11,620 5,432 — — 1,242 18,294 
Substandard— 13,445 7,478 14,001 15,635 1,691 11,929 10,508 74,687 
Nonaccrual— — 203 — — — — — 203 
Commercial real estate - owner occupied$— $16,402 $248,822 $206,488 $162,321 $169,187 $169,766 $213,338 $1,186,324 
Commercial and business lending:
Risk rating:
Pass$503 $1,923,308 $4,128,021 $2,278,627 $1,275,127 $1,406,437 $679,630 $673,422 $12,364,572 
Special mention— 11,139 3,024 11,931 19,206 5,849 24,971 1,535 77,655 
Substandard7,290 78,896 68,071 92,774 37,761 164,532 82,160 12,279 536,473 
Nonaccrual1,473 — 228 7,153 — — — — 7,381 
Commercial and business lending$9,266 $2,013,343 $4,199,344 $2,390,485 $1,332,094 $1,576,818 $786,761 $687,236 $12,986,081 
Commercial real estate - investor:
Risk rating:
Pass$3,195 $185,825 $1,842,395 $776,187 $503,511 $711,947 $432,442 $503,468 $4,955,775 
Special mention— — 40,067 11,135 14,809 58,523 26,964 5,007 156,505 
Substandard— — 24,090 1,446 7,741 70,608 17,633 3,921 125,439 
Nonaccrual— — — 546 — 7,765 — — 8,311 
Commercial real estate - investor$3,195 $185,825 $1,906,552 $789,314 $526,061 $848,843 $477,039 $512,396 $5,246,030 
Real estate construction:
Risk rating:
Pass$— $33,847 $359,610 $720,429 $223,239 $175,056 $2,991 $5,768 $1,520,940 
Special mention— — 20,611 — — 51,262 — — 71,873 
Substandard— — 122,320 42,511 48,980 187,874 — — 401,685 
Nonaccrual— — — — — — — 144 144 
Real estate construction$— $33,847 $502,541 $762,940 $272,219 $414,192 $2,991 $5,912 $1,994,642 
Commercial real estate lending:
Risk rating:
Pass$3,195 $219,672 $2,202,005 $1,496,616 $726,750 $887,003 $435,433 $509,236 $6,476,715 
Special mention— — 60,678 11,135 14,809 109,785 26,964 5,007 228,378 
Substandard— — 146,410 43,957 56,721 258,482 17,633 3,921 527,124 
Nonaccrual— — — 546 — 7,765 — 144 8,455 
Commercial real estate lending$3,195 $219,672 $2,409,093 $1,552,254 $798,280 $1,263,035 $480,030 $518,308 $7,240,672 
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost Basis20252024202320222021PriorTotal
Total commercial:
Risk rating:
Pass$3,698 $2,142,980 $6,330,026 $3,775,243 $2,001,877 $2,293,440 $1,115,063 $1,182,658 $18,841,287 
Special mention— 11,139 63,702 23,066 34,015 115,634 51,935 6,542 306,033 
Substandard7,290 78,896 214,481 136,731 94,482 423,014 99,793 16,200 1,063,597 
Nonaccrual1,473 — 228 7,699 — 7,765 — 144 15,836 
Total commercial$12,461 $2,233,015 $6,608,437 $3,942,739 $2,130,374 $2,839,853 $1,266,791 $1,205,544 $20,226,753 
Residential mortgage:
Risk rating:
Pass$— $— $253,364 $238,787 $480,076 $1,488,335 $1,499,223 $2,764,379 $6,724,164 
Substandard— — — 580 292 129 300 — 1,301 
Nonaccrual— — 2,425 3,102 5,101 13,141 8,985 35,738 68,492 
Residential mortgage$— $— $255,789 $242,469 $485,469 $1,501,605 $1,508,508 $2,800,117 $6,793,957 
Auto finance:
Risk rating:
Pass$— $— $1,287,267 $842,838 $551,549 $388,064 $26,402 $2 $3,096,122 
Special mention— — 295 325 814 621 50 — 2,105 
Nonaccrual— — 559 1,356 2,811 3,255 290 — 8,271 
Auto finance$— $— $1,288,121 $844,519 $555,174 $391,940 $26,742 $2 $3,106,498 
Home equity:
Risk rating:
Pass$15,259 $623,853 $855 $2,188 $2,728 $20,514 $4,733 $49,793 $704,664 
Special mention315 52 — 119 190 104 — 368 833 
Nonaccrual1,038 173 2 221 333 1,016 414 5,615 7,774 
Home equity$16,612 $624,078 $857 $2,528 $3,251 $21,634 $5,147 $55,776 $713,271 
Other consumer:
Risk rating:
Pass$529 $255,490 $13,159 $4,070 $1,990 $958 $264 $43,575 $319,506 
Special mention12 1,139 27 — 5 9 — 20 1,200 
Substandard— 2,374 — — — — — — 2,374 
Nonaccrual2 35 — 3 12 — 2 3 55 
Other consumer$543 $259,038 $13,186 $4,073 $2,007 $967 $266 $43,598 $323,135 
Total consumer:
Risk rating:
Pass$15,788 $879,343 $1,554,645 $1,087,883 $1,036,343 $1,897,871 $1,530,622 $2,857,749 $10,844,456 
Special mention327 1,191 322 444 1,009 734 50 388 4,138 
Substandard— 2,374 — 580 292 129 300 — 3,675 
Nonaccrual1,040 208 2,986 4,682 8,257 17,412 9,691 41,356 84,592 
Total consumer$17,155 $883,116 $1,557,953 $1,093,589 $1,045,901 $1,916,146 $1,540,663 $2,899,493 $10,936,861 
Total loans:
Risk rating:
Pass$19,486 $3,022,323 $7,884,671 $4,863,126 $3,038,220 $4,191,311 $2,645,685 $4,040,407 $29,685,743 
Special mention327 12,330 64,024 23,510 35,024 116,368 51,985 6,930 310,171 
Substandard7,290 81,270 214,481 137,311 94,774 423,143 100,093 16,200 1,067,272 
Nonaccrual2,513 208 3,214 12,381 8,257 25,177 9,691 41,500 100,428 
Total loans$29,616 $3,116,131 $8,166,390 $5,036,328 $3,176,275 $4,755,999 $2,807,454 $4,105,037 $31,163,614 
(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.
The following table presents gross charge offs by origination year for the six months ended June 30, 2026:
Gross Charge Offs by Origination Year
(in thousands)Rev Loans Amortized Cost Basis20262025202420232022PriorTotal
Commercial and industrial$13,356 $135 $160 $254 $712 $425 $6,191 $21,233 
Commercial real estate-owner occupied— — — — — — — — 
Commercial and business lending13,356 135 160 254 712 425 6,191 21,233 
Commercial real estate-investor— — — — — — 2,710 2,710 
Real estate construction— — — — — — — — 
Commercial real estate lending— — — — — — 2,710 2,710 
Total commercial13,356 135 160 254 712 425 8,901 23,943 
Residential mortgage— — 6 57 66 24 107 260 
Auto finance— 110 1,125 1,135 1,547 1,742 179 5,838 
Home equity1 — 60 — 2 13 16 92 
Other consumer4,150 10 100 30 26 12 31 4,359 
Total consumer4,151 120 1,291 1,222 1,641 1,791 333 10,549 
Total gross charge offs$17,507 $255 $1,451 $1,476 $2,353 $2,216 $9,234 $34,492 
The following table presents gross charge offs by origination year for the year ended December 31, 2025:
Gross Charge Offs by Origination Year
(in thousands)Rev Loans Amortized Cost Basis20252024202320222021PriorTotal
Commercial and industrial$5,424 $831 $627 $3,555 $3,799 $379 $— $14,615 
Commercial real estate-owner occupied— — — 113 — — — 113 
Commercial and business lending5,424 831 627 3,668 3,799 379 — 14,728 
Commercial real estate-investor— — 8,356 184 12,666 — — 21,206 
Real estate construction— — — — — — — — 
Commercial real estate lending— — 8,356 184 12,666 — — 21,206 
Total commercial5,424 831 8,983 3,852 16,465 379 — 35,934 
Residential mortgage— — 115 209 320 74 430 1,148 
Auto finance— 432 1,699 2,804 3,384 433 — 8,752 
Home equity— — — 26 5 5 380 416 
Other consumer8,194 18 85 63 63 224 56 8,703 
Total consumer8,194 450 1,899 3,102 3,772 736 866 19,019 
Total gross charge offs$13,618 $1,281 $10,882 $6,954 $20,237 $1,115 $866 $54,953 
Factors that are important to managing overall credit quality are sound loan underwriting and administration, systematic monitoring of existing loans and commitments, effective loan review on an ongoing basis, early identification of potential problems, and appropriate policies for ACLL, nonaccrual loans, and charge offs.
For commercial loans, management has determined the pass credit quality indicator to include credits exhibiting acceptable financial statements, cash flow, and leverage. If any risk exists, it is mitigated by the loan structure, collateral, monitoring, or control. For consumer loans, performing loans include credits performing in accordance with the original contractual terms.
Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Special mention credits have potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit or in the credit position at some future date. Accruing loan modifications could be pass or special mention, depending on the risk rating on the loan. Substandard loans are considered inadequately protected by the current sound worth and paying capacity of the obligor or the collateral pledged, if any. These loans have a well-defined weakness, or weaknesses, which may jeopardize liquidation of the debt, and are characterized by the distinct possibility the Corporation will sustain some loss if the deficiencies are not corrected. Commercial loan relationships over $0.5 million in nonaccrual status, or that otherwise do not share similar risk characteristics with other loans, including those for which a debt restructuring is probable, are evaluated individually for expected credit losses. Commercial loans classified as special mention, substandard, and nonaccrual are reviewed at a minimum on a quarterly basis, while pass credits, which are performing rated credits, are generally reviewed on an annual basis or more frequently if the loan renewal is less than one year or if otherwise warranted.
The recorded investment of consumer loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $19.4 million and $20.1 million at June 30, 2026 and December 31, 2025, respectively.
The following table presents loans by past due status at June 30, 2026:
Accruing
(in thousands)Current30-59 Days
Past Due		60-89 Days
Past Due		90+ Days
Past Due
Nonaccrual(a)(b)
Total
Commercial and industrial$13,694,693 $834 $9,834 $426 $44,388 $13,750,175 
Commercial real estate - owner occupied1,571,158 893 — 139 3,255 1,575,445 
Commercial and business lending15,265,851 1,727 9,834 565 47,643 15,325,620 
Commercial real estate - investor6,478,677 1,839 1,250 — 11,184 6,492,950 
Real estate construction2,541,775 581 856 — 2,974 2,546,186 
Commercial real estate lending9,020,452 2,420 2,106 — 14,158 9,039,136 
Total commercial24,286,303 4,147 11,940 565 61,801 24,364,756 
Residential mortgage6,724,029 13,531 503 — 70,335 6,808,398 
Auto finance4,013,076 17,043 3,324 — 10,973 4,044,416 
Home equity815,225 3,351 1,185 — 6,582 826,343 
Other consumer(c)
418,154 1,899 1,089 1,723 262 423,127 
Total consumer11,970,484 35,824 6,101 1,723 88,152 12,102,284 
Total loans$36,256,787 $39,971 $18,041 $2,288 $149,953 $36,467,040 
(a) Of the total nonaccrual loans, $78.9 million, or 53%, were current with respect to payment at June 30, 2026.
(b) No interest income was recognized on nonaccrual loans for the three and six months ended June 30, 2026. In addition, there were $18.2 million of nonaccrual loans for which there was no related ACLL at June 30, 2026.
(c) Past due portions exclude guaranteed student loans.
The following table presents loans by past due status at December 31, 2025:
Accruing
(in thousands)Current30-59 Days
Past Due		60-89 Days
Past Due		90+ Days 
Past Due
Nonaccrual(a)(b)
Total
Commercial and industrial$11,789,526 $2,153 $530 $370 $7,178 $11,799,757 
Commercial real estate - owner occupied1,186,087 — 34 — 203 1,186,324 
Commercial and business lending12,975,613 2,153 564 370 7,381 12,986,081 
Commercial real estate - investor5,218,314 14,148 5,257 — 8,311 5,246,030 
Real estate construction1,994,381 117 — — 144 1,994,642 
Commercial real estate lending7,212,695 14,265 5,257 — 8,455 7,240,672 
Total commercial20,188,308 16,418 5,821 370 15,836 20,226,753 
Residential mortgage6,712,330 13,135 — — 68,492 6,793,957 
Auto finance3,081,782 14,340 2,105 — 8,271 3,106,498 
Home equity701,719 2,945 833 — 7,774 713,271 
Other consumer(c)
317,932 1,473 1,231 2,444 55 323,135 
Total consumer10,813,763 31,893 4,169 2,444 84,592 10,936,861 
Total loans$31,002,071 $48,311 $9,990 $2,814 $100,428 $31,163,614 
(a) Of the total nonaccrual loans, $31.2 million, or 31%, were current with respect to payment at December 31, 2025.
(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2025. In addition, there were $14.6 million of nonaccrual loans for which there was no related ACLL at December 31, 2025
(c) Past due portions exclude guaranteed student loans.

Loan Modifications
The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at June 30, 2026 and June 30, 2025.
Interest Rate Concession
Amortized Cost
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Commercial and industrial$120 $154 $273 $294 
Other consumer727 737 1,330 1,529 
Total loans modified$847 $891 $1,603 $1,823 
Term Extension
Amortized Cost
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Residential mortgage$553 $305 $1,059 $305 
Combination - Interest Rate Concession and Term Extension
Amortized Cost
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Residential mortgage$1,137 $591 $3,463 $2,094 
Home equity37 67 88 125 
Total loans modified$1,174 $658 $3,551 $2,219 
The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans.
Interest Rate Concession
Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
Three Months Ended Jun 30,Six Months Ended Jun 30,
Loan Type2026202520262025
Commercial and industrial(22)%(23)%(22)%(24)%
Residential mortgage— %2 %1 %1 %
Home equity(2)%— %(2)%(2)%
Other consumer(22)%(21)%(21)%(21)%
Weighted average of total loans modified(9)%(10)%(6)%(8)%
(a) Some interest rate concessions may involve an increase in rate that was lower in comparison to prevailing market rates.
Term Extension
Financial Effect, Weighted Average Term Increase(a)
Three Months Ended Jun 30,Six Months Ended Jun 30,
Loan Type2026202520262025
Residential mortgage115 months165 months107 months152 months
Home equity240 months60 months131 months60 months
Weighted average of total loans modified118 months158 months107 months147 months
(a) During the three months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 300 to 418 months and 268 to 426 months, respectively. During the six months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 305 to 412 months and 267 to 414, respectively.
The Corporation closely monitors the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2026:
Payment Status (Amortized Cost Basis)
(in thousands)Current30-89 Days Past Due90+ Days Past Due
Commercial and industrial$367 $— $— 
Residential mortgage6,509 943 1,183 
Home equity239 — 27 
Other consumer2,055 — — 
Total loans modified$9,170 $943 $1,210 
The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2025:
Payment Status (Amortized Cost Basis)
(in thousands)Current30-89 Days Past Due90+ Days Past Due
Commercial and industrial$431 $— $— 
Residential mortgage3,406 605 702 
Home equity288 31 — 
Other consumer2,303 — — 
Total loans modified$6,427 $635 $702 
The following table provides the amortized cost of loan modifications by loan portfolio and type of concession for loans that were modified in the previous twelve months and subsequently had a payment default during the six months ended June 30, 2026:
Amortized Cost of Loan Modifications that Subsequently Defaulted
(in thousands)Interest Rate ConcessionTerm ExtensionCombination Interest Rate Reduction and Term Extension
Residential mortgage$— $— $303 
None of the loans modified in the previous twelve months subsequently had a payment default during the six months ended June 30, 2025.
The nature and extent of the impairment of modified loans, including those which have experienced a subsequent payment default, are considered in the determination of an appropriate level of the ACLL.
Allowance for Credit Losses on Loans
The ACLL is comprised of the allowance for loan losses and the allowance for unfunded commitments. The level of the ACLL represents management’s estimate of an amount appropriate to provide for expected lifetime credit losses in the loan portfolio at the balance sheet date. The expected lifetime credit losses are the product of multiplying the Corporation's estimates of probability of default, loss given default, and the individual loan level exposure at default on an undiscounted basis. A main factor in the determination of the ACLL is the economic forecast. The forecast the Corporation used for June 30, 2026 was the Moody's baseline scenario from May 2026, which was reviewed against the June 2026 baseline scenario with no material updates made, over a two-year reasonable and supportable period with straight-line reversion to the historical losses over the second year of the period. The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit). See Note 12 for additional information on the change in the allowance for unfunded commitments.
The following table presents a summary of the changes in the ACLL by portfolio segment for the six months ended June 30, 2026:
(in thousands)Dec 31, 2025Provision for loan losses recorded at acquisitionAllowance for PCD loans acquiredAllowance for PSL acquiredCharge offsRecoveriesNet
(Charge offs) Recoveries		Provision for Credit LossesJun 30, 2026ACLL / Loans
Allowance for loan losses
Commercial and industrial$168,636 $294 $19,514 $5,086 $(21,233)$893 $(20,340)$29,105 $202,295 
Commercial real estate — owner occupied11,327 — 2,516 1,198 — — — (1,887)13,154 
Commercial and business lending179,963 294 22,030 6,284 (21,233)893 (20,340)27,218 215,449 
Commercial real estate — investor58,243 — 11,640 7,590 (2,710)500 (2,210)(10,475)64,788 
Real estate construction46,595 — 3,459 3,298 — 4 4 6,065 59,421 
Commercial real estate lending104,838 — 15,099 10,888 (2,710)504 (2,206)(4,410)124,209 
Total commercial284,801 294 37,129 17,172 (23,943)1,397 (22,546)22,808 339,658 
Residential mortgage33,644 — 790 1,028 (260)211 (49)39 35,452 
Auto finance27,470 — 1,346 7,241 (5,838)2,487 (3,351)2,059 34,765 
Home equity16,343 — 174 2,058 (92)782 690 (765)18,500 
Other consumer15,810 103 73 764 (4,359)1,104 (3,255)1,859 15,354 
Total consumer93,267 103 2,383 11,091 (10,549)4,584 (5,965)3,192 104,071 
Total loans$378,068 $397 $39,512 $28,263 $(34,492)$5,981 $(28,511)$26,000 $443,729 
Allowance for unfunded commitments
Commercial and industrial$18,698 $— $1,300 $689 $— $— $— $(1,650)$19,037 
Commercial real estate — owner occupied132 — 18 21 — — — 78 249 
Commercial and business lending18,830 — 1,318 710 — — — (1,572)19,286 
Commercial real estate — investor499 — 102 28 — — — 281 910 
Real estate construction17,947 — 2,169 901 — — — 5,243 26,260 
Commercial real estate lending18,446 — 2,271 929 — — — 5,524 27,170 
Total commercial37,276 — 3,589 1,639 — — — 3,952 46,456 
Home equity2,406 — 8 207 — — — 49 2,670 
Other consumer1,594 — — 25 — — — (1)1,618 
Total consumer4,000 — 8 232 — — — 48 4,288 
Total loans$41,276 $— $3,597 $1,871 $— $— $— $4,000 $50,744 
Allowance for credit losses on loans
Commercial and industrial$187,334 $294 $20,814 $5,775 $(21,233)$893 $(20,340)$27,455 $221,332 1.61 %
Commercial real estate — owner occupied11,459 — 2,534 1,219 — — — (1,809)13,403 0.85 %
Commercial and business lending198,793 294 23,348 6,994 (21,233)893 (20,340)25,646 234,735 1.53 %
Commercial real estate — investor58,742 — 11,742 7,618 (2,710)500 (2,210)(10,194)65,698 1.01 %
Real estate construction64,542 — 5,628 4,199 — 4 4 11,308 85,681 3.37 %
Commercial real estate lending123,284 — 17,370 11,817 (2,710)504 (2,206)1,114 151,379 1.67 %
Total commercial322,077 294 40,718 18,811 (23,943)1,397 (22,546)26,760 386,114 1.58 %
Residential mortgage33,644 — 790 1,028 (260)211 (49)39 35,452 0.52 %
Auto finance27,470 — 1,346 7,241 (5,838)2,487 (3,351)2,059 34,765 0.86 %
Home equity18,749 — 182 2,265 (92)782 690 (716)21,170 2.56 %
Other consumer17,404 103 73 789 (4,359)1,104 (3,255)1,858 16,972 4.01 %
Total consumer97,267 103 2,391 11,323 (10,549)4,584 (5,965)3,240 108,359 0.90 %
Total loans$419,344 $397 $43,109 $30,134 $(34,492)$5,981 $(28,511)$30,000 $494,473 1.36 %
The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2025:
(in thousands)Dec 31, 2024Charge offsRecoveriesNet
(Charge offs) Recoveries		Provision for Credit LossesDec 31, 2025ACLL / Loans
Allowance for loan losses
Commercial and industrial$136,596 $(14,615)$8,357 $(6,258)$38,298 $168,636 
Commercial real estate — owner occupied9,417 (113)— (113)2,023 11,327 
Commercial and business lending146,013 (14,728)8,357 (6,371)40,321 179,963 
Commercial real estate — investor71,547 (21,206)2,985 (18,221)4,917 58,243 
Real estate construction51,499 — 154 154 (5,058)46,595 
Commercial real estate lending123,046 (21,206)3,139 (18,067)(141)104,838 
Total commercial269,060 (35,934)11,496 (24,438)40,180 284,801 
Residential mortgage32,576 (1,148)615 (533)1,601 33,644 
Auto finance28,467 (8,752)3,029 (5,723)4,726 27,470 
Home equity16,620 (416)999 583 (860)16,343 
Other consumer16,823 (8,703)1,837 (6,866)5,853 15,810 
Total consumer94,486 (19,019)6,480 (12,539)11,320 93,267 
Total loans$363,545 $(54,953)$17,976 $(36,977)$51,500 $378,068 
Allowance for unfunded commitments
Commercial and industrial$14,456 $— $— $— $4,242 $18,698 
Commercial real estate — owner occupied151 — — — (19)132 
Commercial and business lending14,607 — — — 4,223 18,830 
Commercial real estate — investor578 — — — (79)499 
Real estate construction19,591 — — — (1,644)17,947 
Commercial real estate lending20,169 — — — (1,723)18,446 
Total commercial34,776 — — — 2,500 37,276 
Home equity2,465 — — — (59)2,406 
Other consumer1,535 — — — 59 1,594 
Total consumer4,000 — — — — 4,000 
Total loans$38,776 $— $— $— $2,500 $41,276 
Allowance for credit losses on loans
Commercial and industrial$151,052 $(14,615)$8,357 $(6,258)$42,540 $187,334 1.59 %
Commercial real estate — owner occupied9,568 (113)— (113)2,004 11,459 0.97 %
Commercial and business lending160,620 (14,728)8,357 (6,371)44,544 198,793 1.53 %
Commercial real estate — investor72,125 (21,206)2,985 (18,221)4,838 58,742 1.12 %
Real estate construction71,090 — 154 154 (6,702)64,542 3.24 %
Commercial real estate lending143,215 (21,206)3,139 (18,067)(1,864)123,284 1.70 %
Total commercial303,835 (35,934)11,496 (24,438)42,680 322,077 1.59 %
Residential mortgage32,576 (1,148)615 (533)1,601 33,644 0.50 %
Auto finance28,467 (8,752)3,029 (5,723)4,726 27,470 0.88 %
Home equity19,085 (416)999 583 (919)18,749 2.63 %
Other consumer18,358 (8,703)1,837 (6,866)5,912 17,404 5.39 %
Total consumer98,486 (19,019)6,480 (12,539)11,320 97,267 0.89 %
Total loans$402,322 $(54,953)$17,976 $(36,977)$54,000 $419,344 1.35 %
v3.26.1
Goodwill and Other Intangible Assets
 6 Months Ended
Jun. 30, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
Goodwill
The Corporation conducted its most recent annual impairment testing in May 2026, utilizing a qualitative assessment. Based on this assessment, management concluded that it is more likely than not that the estimated fair value exceeded the carrying value (including goodwill) for each reporting unit. Therefore, a step one quantitative analysis was not required. There have been no events since the May 2026 impairment test that have changed the Corporation's impairment assessment conclusion. There were no impairment charges recorded in the first six months of 2025 or 2026.
The Corporation added $42.1 million goodwill related to the American National acquisition in the second quarter of 2026. The Corporation had goodwill of $1.1 billion at both June 30, 2026 and December 31, 2025.
Core Deposit Intangibles
The Corporation has CDIs which are amortized. CDI recorded as part of the American National acquisition is amortized over ten years using the sum of digits method while prior acquisitions are amortized under the straight line method. Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:
(in thousands)Six Months Ended Jun 30, 2026Year Ended Dec 31, 2025
Core deposit intangibles
Gross carrying amount at the beginning of period$88,109 $88,109 
Additions during the period103,200 — 
Accumulated amortization(74,356)(65,260)
Net book value$116,953 $22,849 
Amortization during the period$9,096 $8,811 
Mortgage Servicing Rights
A summary of changes in the balance of the MSRs asset under the fair value measurement method is as follows:
(in thousands)Six Months Ended Jun 30, 2026Year Ended Dec 31, 2025
Mortgage servicing rights
Mortgage servicing rights at beginning of period$86,337 $87,683 
Additions6,159 8,716 
Decay(4,899)(8,621)
Valuation:
Changes in fair value of asset86 (1,441)
Mortgage servicing rights at end of period$87,683 $86,337 
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)$6,160,254 $6,191,012 
Mortgage servicing rights to servicing portfolio1.42 %1.39 %
The projections of amortization expense for CDIs and decay for MSRs are based on existing asset balances, the current interest rate environment, and prepayment speeds as of June 30, 2026. The actual expense the Corporation recognizes in any given period may be significantly different depending upon acquisition or sale activities, changes in interest rates, prepayment speeds, market conditions, regulatory requirements, and events or circumstances that indicate the carrying amount of an asset may not be recoverable. The following table shows the estimated future yearly amortization expense for CDIs and decay for MSRs:
(in thousands)Core Deposit IntangiblesMortgage Servicing Rights
Six Months Ended December 31, 2026$13,788 $4,817 
202726,167 11,601 
202818,965 11,838 
202915,285 11,189 
203011,788 10,214 
20319,851 9,123 
Beyond 203121,109 28,901 
Total estimated amortization expense and MSRs decay(a)
$116,953 $87,683 
(a) Includes the decrease in value due to passage of time, including the impact from both regularly scheduled principal payments and partial loan paydowns.
v3.26.1
Short and Long-Term Funding
 6 Months Ended
Jun. 30, 2026
Debt Disclosure [Abstract]  
Short and Long-Term Funding Short and Long-Term Funding
The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year):
(in thousands)June 30, 2026December 31, 2025
Short-term funding
Federal funds purchased$473,905 $260,070 
Securities sold under agreements to repurchase55,371 47,794 
Federal funds purchased and securities sold under agreements to repurchase$529,276 $307,864 
Long-term funding
Corporation senior notes, at par$300,000 $300,000 
Corporation subordinated notes, at par300,000 300,000 
Discount and capitalized costs(6,895)(7,484)
Subordinated debt fair value hedge(a)
(2,025)1,760 
Total long-term funding$591,080 $594,276 
   Total short and long-term funding, excluding FHLB advances$1,120,356 $902,140 
FHLB advances
Short-term FHLB advances$4,315,000 $2,855,250 
Long-term FHLB advances263,115 414,122 
FHLB advances fair value hedge(a)
(3,434)(1,278)
Total FHLB advances$4,574,681 $3,268,094 
Total short and long-term funding$5,695,037 $4,170,234 
(a) For additional information on the fair value hedges, see Note 10.
Securities Sold Under Agreements to Repurchase
The Corporation enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Corporation may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Corporation to repurchase the assets. The obligation to repurchase the securities is reflected as a liability on the Corporation’s consolidated balance sheets, while the securities underlying the repurchase agreements remain in the respective investment securities asset accounts (i.e., there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities).
The Corporation utilizes repurchase agreements to facilitate the needs of its customers. The fair value of securities pledged to secure repurchase agreements may decline. At June 30, 2026, the Corporation had pledged securities valued at 202% of the gross outstanding balance of repurchase agreements to manage this risk.
The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets is presented in the following table:
Overnight and Continuous
(in thousands)June 30, 2026December 31, 2025
Repurchase agreements
Agency mortgage-related securities$55,371 $47,794 
Long-Term Funding
Senior Notes
In August 2024, the Corporation issued $300.0 million in aggregate principal amount of 6.455% Fixed Rate / Floating Rate Senior Notes due August 29, 2030. During the period from, and including, August 29, 2024, to, but excluding, August 29, 2029, the senior notes will have a fixed coupon interest rate of 6.455% per annum, payable semi-annually in arrears. During the period from, and including, August 29, 2029, to, but excluding, the maturity date, the senior notes will have a floating rate per annum equal to Compounded SOFR, as defined in the Global Note issued in connection with the senior notes, plus 3.030%, payable quarterly in arrears. Prior to August 29, 2029, the Corporation may, at its option, redeem the senior notes, in whole or in part, at any time and from time to time, by paying the redemption price, as defined in the Global Note issued in connection with the senior notes, plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. On August 29, 2029, the Corporation may at its option, redeem the senior notes, in whole, but not in part, by paying the aggregate principal amount of the notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. At any time and from time to time on or after July 30, 2030 (30 days prior to the maturity date), the Corporation may, at its option,
redeem the senior notes in whole or in part by paying the aggregate principal amount of the senior notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. The senior notes were issued at a discount.
Subordinated Notes 
In February 2023, the Corporation issued $300.0 million of 10-year subordinated notes, due March 1, 2033 and redeemable in whole or in part at the Corporation's option (i) on the reset date of March 1, 2028 and any interest payment date thereafter, (ii) at any time on or after the three month period prior to the maturity date, and (iii) upon the occurrence of a Regulatory Capital Treatment Event, as defined in the Global Note issued in connection with the subordinated notes. The subordinated notes have a fixed coupon interest rate of 6.625% until the reset date, after which the rate will be equal to the Five-Year U.S. Treasury Rate as of the reset date plus 2.812% per annum. The notes were issued at a discount.
FHLB Advances
Under agreements with the FHLB of Chicago, FHLB advances are secured by pledging qualifying collateral of the subsidiary bank (such as residential mortgage loans, residential mortgage loans held for sale, home equity loans, CRE loans, and investment securities). The FHLB advances had maturity or call dates ranging from 2026 through 2031 at June 30, 2026.
v3.26.1
Derivative and Hedging Activities
 6 Months Ended
Jun. 30, 2026
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative and Hedging Activities
The Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the payment of future known and uncertain cash amounts, the value of which are determined by interest and currency rates as well as other economic conditions.
At inception, the Corporation designates the derivative contract as either a fair value hedge (i.e., a hedge of the fair value of a recognized asset or liability), a cash flow hedge (i.e., a hedge of the variability of cash flows to be received or paid related to a recognized asset or liability), or a non-designated hedge. The hedge accounting methodologies applied for fair value, cash flow, and non-designated hedges are described in the Derivative and Hedging Activities note in the Corporation's 2025 Annual Report on Form 10-K.
The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amounts to be exchanged between the counterparties. The Corporation is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. To mitigate the counterparty risk, contracts generally contain language outlining collateral pledging requirements for each counterparty. For non-centrally cleared derivatives, collateral must be posted when the market value exceeds certain mutually agreed upon threshold limits. Securities and cash are often pledged as collateral. The Corporation pledged $73.8 million and $79.4 million of investment securities as collateral at June 30, 2026, and December 31, 2025, respectively. Cash is often pledged or received as collateral for derivatives that are not centrally cleared. The Corporation's cash collateral pledged was $3.5 million at June 30, 2026 and $11.8 million at December 31, 2025. For fair value information and disclosures and for the Corporation's accounting policy for derivative and hedging activities, see the Fair Value Measurements and Summary of Significant Accounting Policies notes in the Corporation's 2025 Annual Report on Form 10-K.
The following table presents the total notional amounts and gross fair values of the Corporation's derivatives, as well as the balance sheet netting adjustments:
Jun 30, 2026Dec 31, 2025
AssetLiabilityAssetLiability
(in thousands)Notional AmountFair ValueNotional AmountFair ValueNotional AmountFair ValueNotional AmountFair Value
Designated as hedging instruments:
Interest rate-related instruments(a)
$1,150,000 $1,435 $1,650,000 $6,737 $2,425,000 $10,517 $25,000 $1 
Foreign currency exchange forwards48,307 1,355 269,686 303 280,159 757 38,384 194 
Total designated as hedging instruments2,790 7,040 11,274 195 
Not designated as hedging instruments:
Interest rate-related and other instruments5,496,857 61,693 6,553,249 111,446 4,775,818 66,787 7,072,274 108,631 
Foreign currency exchange forwards65,014 440 13,535 198 48,904 1,731 43,787 1,517 
Mortgage banking(b)
68,998 1,432 141,000 397 39,998 814 107,000 444 
Total not designated as hedging instruments63,565 112,041 69,332 110,592 
Gross derivatives before netting66,355 119,081 80,606 110,787 
Less: Legally enforceable master netting agreements9,343 9,343 12,839 12,839 
Less: Cash collateral pledged/received17,769 720 10,343 8,334 
Total derivative instruments, after netting$39,243 $109,018 $57,424 $89,614 

(a) The notional amounts of the interest rate-related instruments designated as hedging instruments include forward starting interest rate swaps. As of June 30, 2026, this includes swaps with an effective dates of November 1, 2026 to December 1, 2026 that had an asset notational and fair value of $100.0 million and $0.2 million, respectively, and a liability notional amount and fair value of $250.0 million and $1.5 million, respectively. As of December 31, 2025, the Corporation did not have any forward starting interest rate-swaps.
(b) The mortgage derivative asset includes interest rate lock commitments, while the mortgage derivative liability includes forward commitments. Given the fair value position as of June 30, 2026, the fair value of the mortgage derivative asset included $1.4 million of interest rate lock commitments and the derivative liability included $0.4 million of forward commitments. Given the fair value position as of December 31, 2025, the fair value of the mortgage derivative asset included $0.8 million of interest rate lock commitments and the derivative liability included $0.4 million of forward commitments.

The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges:
Line Item in the Consolidated Balance Sheets in Which the Hedged Item is Included
Carrying Amount of the Hedged Assets/(Liabilities)(a)
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)
Carrying Amount of the Hedged Assets/(Liabilities)(a)
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)
(in thousands)Jun 30, 2026Dec 31, 2025
Other long-term funding$(297,975)$2,025 $(301,760)$(1,760)
FHLB Advances(196,566)3,434 (198,722)1,278 
Total$(494,541)$5,459 $(500,482)$(482)

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At June 30, 2026 and December 31, 2025, the carrying amount excluded for foreign currency denominated loans was $318.0 million and $318.5 million, respectively.
The Corporation terminated its $500.0 million fair value hedge during the fourth quarter of 2019. At June 30, 2026, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $151.4 million and is included in loans on the consolidated balance sheets. This amount includes $0.7 million of hedging adjustments on the discontinued hedging relationships, which are not presented in the table above.
The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income:
Location and Amount Recognized on the Consolidated Statements of Income in
Fair Value and Cash Flow Hedging Relationships
Three Months Ended Jun 30,Six Months Ended Jun 30,
2026202520262025
(in thousands)Interest Income Interest (Expense)Interest IncomeInterest (Expense)Interest IncomeInterest (Expense)Interest IncomeInterest (Expense)
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value or cash flow hedges are recorded(a)
$565 $(380)$(1,464)$(1,942)$1,169 $(777)$(2,614)$(4,160)
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items (31)2,952 (27)(4,099)(174)5,942 (58)(11,096)
Derivatives designated as hedging instruments(a)
597 (3,332)(1,437)2,158 1,343 (6,719)(2,555)6,936 
(a) Includes net settlements on the derivatives.
Location and Amount Recognized on the Consolidated Statements of Income in
Fair Value Hedging Relationships
Three Months Ended Jun 30,Six Months Ended Jun 30,
2026202520262025
(in thousands)Capital Markets, NetCapital Markets, NetCapital Markets, NetCapital Markets, Net
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value hedges are recorded$51 $— $53 $1 
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items(13,163)19,542 (18,086)20,095 
Derivatives designated as hedging instruments13,214 (19,542)18,139 (20,093)
The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss):
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivatives(a)
$(6,506)$1,264 $(14,418)$8,532 
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)
(597)1,437 (1,343)2,555 
(a) The entirety of gains (losses) recognized in OCI as well as those reclassified from accumulated other comprehensive income (loss) into interest income were included components in the assessment of hedge effectiveness.
Amounts reported in accumulated other comprehensive income (loss) related to cash flow hedge derivatives are reclassified to interest income as interest payments are made on the hedged variable interest rate assets. The Corporation estimates that $3.1 million will be reclassified as a decrease to interest income over the next 12 months. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, or the addition of other hedges subsequent to June 30, 2026. The maximum length of time over which the Corporation is hedging its exposure to the variability in future cash flows is 41 months as of June 30, 2026.
The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income:
Consolidated Statements of Income Category of Gain / (Loss) 
Recognized in Income		Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Derivative instruments
Interest rate-related and other instruments — customer and mirror, netCapital markets, net$(1)$(42)$(31)$(90)
Interest rate-related instruments — MSRs hedgeMortgage banking, net(420)(308)(219)1,158 
Foreign currency exchange forwardsCapital markets, net202 (1,075)642 (575)
Interest rate lock commitments (mortgage)Mortgage banking, net595 933 617 1,594 
Forward commitments (mortgage)Mortgage banking, net(1,339)(779)46 (1,616)
v3.26.1
Balance Sheet Offsetting
 6 Months Ended
Jun. 30, 2026
Offsetting [Abstract]  
Additional Financial Information Disclosure [Text Block] Balance Sheet Offsetting
Interest Rate-Related Instruments and Foreign Exchange Forwards (“Interest and Foreign Exchange Agreements”)
The Corporation is permitted to present derivative receivables and derivative payables with the same counterparty and the related cash collateral receivables and payables on a net basis on the consolidated balance sheets when a legally enforceable master netting agreement exists. The Corporation has elected to net such balances where it has determined that the specified conditions are met.
The Corporation uses master netting agreements to mitigate counterparty credit risk in these transactions, including derivative contracts. A master netting agreement is a single agreement with a counterparty that permits multiple transactions governed by that agreement to be terminated or accelerated and settled through a single payment in a single currency in the event of a default (e.g., bankruptcy, failure to make a required payment or securities transfer, or failure to deliver collateral or margin when due).
Typical master netting agreements for these types of transactions also contain a collateral/margin agreement that provides for a security interest in, or title transfer of, securities or cash collateral/margin to the party that has the right to demand margin (the "demanding party"). The collateral/margin agreement typically requires a party to transfer collateral/margin to the demanding party with a value equal to the amount of the margin deficit on a net basis across all transactions governed by the master netting agreement, less any threshold. The collateral/margin agreement grants to the demanding party, upon default by the counterparty, the right to offset any amounts payable by the counterparty against any posted collateral or the cash equivalent of any posted collateral/margin. It also grants to the demanding party the right to liquidate collateral/margin and to apply the proceeds to an amount payable by the counterparty.
For additional information on the Corporation’s derivative and hedging activities, see the Derivative and Hedging Activities note in the Corporation's 2025 Annual Report on Form 10-K.
The following tables present the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from these tables:
Gross Amounts RecognizedGross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance SheetsNet Amounts Presented on the Consolidated Balance SheetsGross Amounts Not Offset on the Consolidated Balance Sheets
 (in thousands)Derivative
Liabilities Offset		Cash Collateral ReceivedSecurity Collateral ReceivedNet
Amount
Derivative assets
June 30, 2026$48,451 $(9,343)$(17,769)$21,339 $(17,912)$3,427 
December 31, 202542,468 (12,839)(10,343)19,286 (18,131)1,155 
Gross Amounts RecognizedGross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance SheetsNet Amounts Presented on the Consolidated Balance SheetsGross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)Derivative
Assets Offset		Cash Collateral PledgedSecurity Collateral PledgedNet
 Amount
Derivative liabilities
June 30, 2026$15,109 $(9,343)$(720)$5,046 $— $5,046 
December 31, 202523,006 (12,839)(8,334)1,833 — 1,833 
v3.26.1
Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters
 6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]  
Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters Commitments, Off-Balance Sheet Arrangements, and Legal Proceedings
The Corporation utilizes a variety of financial instruments in the normal course of business to meet the financial needs of its customers and to manage its own exposure to fluctuations in interest rates. These financial instruments include lending-related and other commitments (see below) as well as derivative instruments (see Note 10). The following is a summary of lending-related commitments:
(in thousands)Jun 30, 2026Dec 31, 2025
Commitments to extend credit(a), excluding commitments to originate residential mortgage loans held for sale(b)
$13,006,388 $11,872,816 
Commercial letters of credit(a)
589 425 
Standby letters of credit(c)
252,770 222,047 
(a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at June 30, 2026 or December 31, 2025.
(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10.
(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2.4 million at June 30, 2026 and $2.2 million at December 31, 2025, as an estimate of the fair value of these financial instruments.
Lending-related Commitments
As a financial services provider, the Corporation routinely enters into commitments to extend credit. Such commitments are subject to the same credit policies and approval process accorded to loans made by the Corporation, with each customer’s creditworthiness evaluated on a case-by-case basis. The commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to these financial instruments is represented by the contractual amount of those instruments. The amount of collateral obtained, if deemed necessary by the Corporation upon extension of credit, is based on management’s credit evaluation of the customer. Since a significant portion of commitments to extend credit are subject to specific restrictive loan covenants or may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. An allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded commitments (including unfunded loan commitments and letters of credit).
The following table presents a summary of the changes in the allowance for unfunded commitments:
(in thousands)Six Months Ended Jun 30, 2026Year Ended Dec 31, 2025
Allowance for unfunded commitments
Balance at beginning of period$41,276 $38,776 
Initial allowance for PCD unfunded commitments3,597 — 
Initial allowance for purchased seasoned unfunded commitments1,871 — 
Provision for unfunded commitments4,000 2,500 
Balance at end of period$50,744 $41,276 
Lending-related commitments include commitments to extend credit, commitments to originate residential mortgage loans held for sale, commercial letters of credit, and standby letters of credit. Commitments to extend credit are legally binding agreements to lend to customers at predetermined interest rates, as long as there is no violation of any condition established in the contracts. Interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments is recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s derivative and hedging activity is further described in Note 10. Commercial and standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party, while standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party.
Other Commitments
The Corporation invests in qualified affordable housing projects, historic projects, new market projects, and opportunity zone funds for the purpose of community reinvestment and obtaining tax credits and other tax benefits. Return on the Corporation's investment in these projects and funds comes in the form of the tax credits and tax losses that pass through to the Corporation.
The aggregate carrying value of investments in qualified affordable housing and historic projects at June 30, 2026 was $161.3 million, compared to $174.3 million at December 31, 2025, included in tax credit and other investments on the consolidated balance sheets. The Corporation's remaining investments accounted for under the proportional amortization method totaled $160.0 million at June 30, 2026 and $172.2 million at December 31, 2025.
Under the proportional amortization method, the Corporation amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits. The following table summarizes income tax credits, other income tax benefits, and investment amortization generated from the Corporation's investments in these projects, which are recognized as a component within income tax expense on the consolidated statements of income and included in the change in net income tax position and amortization of tax credit investments on the consolidated statements of cash flows:
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Income tax credits and other income tax benefits recognized$10,406 $10,772 $19,543 $20,230 
Amortization expense8,692 8,369 17,146 17,058 
The Corporation’s unfunded contributions relating to investments in qualified affordable housing and historic projects are recorded in accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s remaining unfunded contributions totaled $22.5 million at June 30, 2026 and $22.8 million at December 31, 2025.
For the three and six months ended June 30, 2026 and 2025, the Corporation recorded impairment of $0.9 million related to qualified affordable housing investments and historic tax credits which was recognized through asset gains (losses), net on the consolidated statements of income and included in the net change in other assets and liabilities on the consolidated statements of cash flows.
The Corporation has principal investment commitments to provide capital-based financing to private companies through either direct investment in specific companies or through investment funds and partnerships. The timing of future cash requirements to fund such principal investment commitments is generally dependent on the investment cycle, whereby privately held companies are funded by private equity investors and ultimately sold, merged, or taken public through an initial public offering, which can vary based on overall market conditions, as well as the nature and type of industry in which the companies operate. The timing of future cash requirements to fund these pools is dependent upon loan demand, which can vary over time. The aggregate carrying value of these investments was $74.3 million at June 30, 2026 and $62.3 million at December 31, 2025, included in tax credit and other investments on the consolidated balance sheets.
Legal Proceedings
The Corporation is party to various pending and threatened claims and legal proceedings arising in the normal course of business activities, some of which involve claims for substantial amounts. Although there can be no assurance as to the ultimate outcomes, the Corporation believes it has meritorious defenses to the claims asserted against it in its currently outstanding matters and intends to continue to defend itself vigorously with respect to such legal proceedings. The Corporation will consider settlement of cases when, in management’s judgment, it is in the best interests of the Corporation and its shareholders.
Management believes that the legal proceedings currently pending against it should not have a material adverse effect on the Corporation’s consolidated financial condition. However, in light of the uncertainties involved in such proceedings, there is no assurance that the ultimate resolution of these matters will not significantly exceed the reserves the Corporation has currently accrued or that a matter will not have material reputational or other qualitative consequences. As a result, the outcome of a particular matter may be material to the Corporation’s operating results for a particular period, depending on, among other factors, the size of the loss or liability imposed and the level of the Corporation’s income for that period.
Mortgage Repurchase Reserve
The Corporation sells residential mortgage loans to investors in the normal course of business. Residential mortgage loans sold to others are predominantly conventional residential first lien mortgages originated under the Corporation's usual underwriting procedures, and are most often sold on a nonrecourse basis, primarily to the GSEs. The Corporation’s agreements to sell residential mortgage loans in the normal course of business usually require certain representations and warranties on the underlying loans sold, related to credit information, loan documentation, collateral, and insurability. Subsequent to being sold, if a material underwriting deficiency or documentation defect is discovered, the Corporation may be obligated to repurchase the loan or reimburse the GSEs for losses incurred (collectively, “make whole requests”). The make whole requests and any related risk of loss under the representations and warranties are largely driven by borrower performance. The Corporation also sells qualifying residential mortgage loans guaranteed by U.S. government agencies into GNMA pools.
As a result of make whole requests, the Corporation has repurchased loans with aggregate principal balances of $2.9 million and $3.5 million for the six months ended June 30, 2026 and the year ended December 31, 2025, respectively. There were no loss reimbursement and settlement claims paid in the six months ended June 30, 2026 or for the year ended December 31, 2025. Make whole requests since January 1, 2025 generally arose from loans originated since January 1, 2022 with balances totaling $4.3 billion at the time of sale, consisting primarily of loans sold to GSEs. As of June 30, 2026, $2.0 billion of those loans originated since January 1, 2022 remain outstanding.
The balance in the mortgage repurchase reserve at the balance sheet date reflects the estimated amount of potential loss the Corporation could incur from repurchasing a loan, as well as loss reimbursements, indemnifications, and other settlement resolutions. The mortgage repurchase reserve, included in accrued expenses and other liabilities on the consolidated balance sheets, was $0.4 million at June 30, 2026 and $0.3 million at December 31, 2025.
The Corporation may also sell residential mortgage loans with limited recourse (limited in that the recourse period ends prior to the loan’s maturity, usually after certain time and/or loan paydown criteria have been met), whereby repurchase could be required if the loan had defined delinquency issues during the limited recourse periods. At June 30, 2026 and December 31, 2025, there were $12.2 million and $11.4 million, respectively, of residential mortgage loans sold with such recourse risk. There have been limited instances and immaterial historical losses on repurchases for recourse under the limited recourse criteria.
The Corporation has a subordinate position to the FHLB in the credit risk on residential mortgage loans it sold to the FHLB Mortgage Partnership Finance Traditional program in exchange for a monthly credit enhancement fee. At June 30, 2026 and December 31, 2025, there were $365.8 million and $273.4 million, respectively, of such residential mortgage loans with credit risk recourse, upon which there have been immaterial historical losses to the Corporation.
v3.26.1
Fair Value Measurements
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
Fair value represents the estimated price at which an orderly transaction to sell an asset or to transfer a liability would take place between market participants at the measurement date under current market conditions (i.e., an exit price concept).
The valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis are described in the Fair Value Measurements note in the Corporation’s 2025 Annual Report on Form 10-K, as well as Note 3 Business Combinations.
The tables below present the Corporation’s financial instruments measured at fair value on a recurring basis and carrying amounts and estimated fair values of certain financial instruments, aggregated by the level in the fair value hierarchy within which those measurements fall:
Jun 30, 2026
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Assets
Cash and due from banks$548,057 $548,057 $548,057 $— $— 
Interest-bearing deposits in other financial institutions1,268,379 1,268,379 1,268,379 — — 
Federal funds sold and securities purchased under agreements to resell14,355 14,355 14,355 — — 
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)7,240 7,240 — 7,240 — 
Residential mortgage-related securities:
FNMA / FHLMC137,288 137,288 — 137,288 — 
GNMA5,491,648 5,491,648 — 5,491,648 — 
Commercial mortgage-related securities:
FNMA / FHLMC410,221 410,221 — 410,221 — 
GNMA106,844 106,844 — 106,844 — 
Asset backed securities:
FFELP88,212 88,212 — 88,212 — 
SBA120,070 120,070 — 120,070 — 
Other debt securities(b)
5,063 5,063 — 3,000 2,063 
Total AFS investment securities6,366,586 6,366,586 — 6,364,523 2,063 
HTM investment securities:
U.S. Treasury securities997 1,002 1,002 — — 
Obligations of state and political subdivisions (municipal securities)1,591,681 1,468,604 — 1,468,604 — 
Residential mortgage-related securities:
FNMA / FHLMC790,729 660,737 — 660,737 — 
GNMA37,215 34,626 — 34,626 — 
Private-label292,007 246,460 — 246,460 — 
Commercial mortgage-related securities:
FNMA / FHLMC757,723 644,300 — 644,300 — 
GNMA40,423 36,089 — 36,089 — 
Total HTM investment securities3,510,775 3,091,818 1,002 3,090,816 — 
Equity securities:
Equity securities14,960 14,960 14,960 — — 
Equity securities at NAV15,000 15,000 
Total equity securities29,960 29,960 
Regulatory stocks329,436 329,436 — 329,436 — 
Residential loans held for sale94,490 94,490 — 94,490 — 
Commercial loans held for sale15,000 15,000 — 15,000 — 
Loans, net35,976,291 35,021,793 — — 35,021,793 
Bank and corporate owned life insurance717,116 717,116 — 717,116 — 
Mortgage servicing rights, net87,683 87,683 — — 87,683 
Interest rate-related instruments designated as hedging instruments(a)
1,435 1,435 — 1,435 — 
Foreign currency exchange forwards designated as hedging instruments(a)
1,355 1,355 — 1,355 — 
Interest rate-related and other instruments not designated as hedging instruments(a)
61,693 61,693 — 61,693 — 
Foreign currency exchange forwards not designated as hedging instruments(a)
440 440 — 440 — 
Interest rate lock commitments to originate residential mortgage loans held for sale1,432 1,432 — — 1,432 
Total selected assets at fair value$49,024,483 $47,651,028 $1,846,753 $10,676,304 $35,112,971 
(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
(b) The quantifiable unobservable input for fair value measurement of the Level 3 classified security is externally developed.
Jun 30, 2026
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Liabilities
Deposits:
Brokered CDs$3,933,787 $3,923,505 $— $3,923,505 $— 
Other time deposits4,782,343 4,771,175 — 4,771,175 — 
Federal funds purchased and securities sold under agreements to repurchase529,276 529,276 529,276 — — 
FHLB advances4,574,681 4,568,111 — 4,568,111 — 
Senior and subordinated debt591,080 589,506 — 589,506 — 
Standby letters of credit(a)
2,365 2,365 — 2,365 — 
Interest rate-related instruments designated as hedging instruments(b)
6,737 6,737 — 6,737 — 
Foreign currency exchange forwards designated as hedging instruments(b)
303 303 — 303 — 
Interest rate-related and other instruments not designated as hedging instruments(b)
111,446 111,446 — 111,446 — 
Foreign currency exchange forwards not designated as hedging instruments(b)
198 198 — 198 — 
Forward commitments to sell residential mortgage loans397 397 — — 397 
Total selected liabilities at fair value$14,532,613 $14,503,019 $529,276 $13,973,346 $397 

(a) The commitment on standby letters of credit was $252.8 million at June 30, 2026. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.
(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
Dec 31, 2025
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Assets
Cash and due from banks$574,698 $574,698 $574,698 $— $— 
Interest-bearing deposits in other financial institutions1,144,123 1,144,123 1,144,123 — — 
Federal funds sold and securities purchased under agreements to resell1,400 1,400 1,400 — — 
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)3,044 3,044 — 3,044 — 
Residential mortgage-related securities:
FNMA / FHLMC129,863 129,863 — 129,863 — 
GNMA5,039,829 5,039,829 — 5,039,829 — 
Commercial mortgage-related securities:
FNMA / FHLMC16,958 16,958 — 16,958 — 
GNMA109,556 109,556 — 109,556 — 
Asset backed securities:
FFELP95,046 95,046 — 95,046 — 
SBA269 269 — 269 — 
Other debt securities2,998 2,998 — 2,998 — 
Total AFS investment securities5,397,563 5,397,563 — 5,397,563 — 
HTM investment securities:
U.S. Treasury securities996 1,015 1,015 — — 
Obligations of state and political subdivisions (municipal securities)1,628,088 1,507,302 — 1,507,302 — 
Residential mortgage-related securities:
FNMA / FHLMC823,630 696,462 — 696,462 — 
GNMA39,123 36,884 — 36,884 — 
Private-label302,817 258,827 — 258,827 — 
Commercial mortgage-related securities:
FNMA / FHLMC763,370 650,366 — 650,366 — 
GNMA44,552 40,138 — 40,138 — 
Total HTM investment securities3,602,576 3,190,994 1,015 3,189,979 — 
Equity securities:
Equity securities11,060 11,060 11,060 — — 
Equity securities at NAV15,000 15,000 
Total equity securities26,060 26,060 
Regulatory stocks252,514 252,514 — 252,514 — 
Residential loans held for sale72,499 72,499 — 72,499 — 
Loans, net30,766,886 29,970,788 — — 29,970,788 
Bank and corporate owned life insurance694,452 694,452 — 694,452 — 
Mortgage servicing rights, net86,337 86,337 — — 86,337 
Interest rate-related instruments designated as hedging instruments(a)
10,517 10,517 — 10,517 — 
Foreign currency exchange forwards designated as hedging instruments(a)
757 757 — 757 — 
Interest rate-related and other instruments not designated as hedging instruments(a)
66,787 66,787 — 66,787 — 
Foreign currency exchange forwards not designated as hedging instruments(a)
1,731 1,731 — 1,731 — 
Interest rate lock commitments to originate residential mortgage loans held for sale814 814 — — 814 
Total selected assets at fair value$42,699,714 $41,492,034 $1,732,296 $9,686,799 $30,057,939 
(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
Dec 31, 2025
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Liabilities
Deposits:
Brokered CDs$3,795,133 $3,791,245 $— $3,791,245 $— 
Other time deposits4,041,178 4,035,549 — 4,035,549 — 
Federal funds purchased and securities sold under agreements to repurchase307,864 307,864 307,864 — — 
FHLB advances3,268,094 3,267,836 — 3,267,836 — 
Senior and subordinated debt594,276 598,141 — 598,141 — 
Standby letters of credit(a)
2,225 2,225 — 2,225 — 
Interest rate-related instruments designated as hedging instruments(b)
1 1 — 1 — 
Foreign currency exchange forwards designated as hedging instruments(b)
194 194 — 194 — 
Interest rate-related and other instruments not designated as hedging instruments(b)
108,631 108,631 — 108,631 — 
Foreign currency exchange forwards not designated as hedging instruments(b)
1,517 1,517 — 1,517 — 
Forward commitments to sell residential mortgage loans444 444 — — 444 
Total selected liabilities at fair value$12,119,557 $12,113,647 $307,864 $11,805,339 $444 
(a) The commitment on standby letters of credit was $222.0 million at December 31, 2025. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.
(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
The table below presents a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage derivatives measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy:
(in thousands)Interest rate lock commitments to originate residential mortgage loans held for saleForward commitments to sell residential mortgage loans
Balance December 31, 2024$327 $(254)
New production13,435 (3,998)
Closed loans / settlements(13,690)2,738 
Other742 1,958 
Change in mortgage derivative487 698 
Balance December 31, 2025814 444 
New production7,629 (2,240)
Closed loans / settlements(6,308)2,910 
Other(703)(717)
Change in mortgage derivative618 (47)
Balance June 30, 2026$1,432 $397 
Refer to Note 8 for a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage servicing rights measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy.
The following table presents a rollforward of the fair value of Level 3 equity securities that are measured under the measurement alternative, and the related adjustments recorded during the periods presented for those securities with observable price changes:
 (in thousands)
Fair value as of December 31, 2024$72 
Purchases14 
Sales(23)
Transfers out of level 3(63)
Fair value as of December 31, 2025$— 
The Corporation did not have any activity for Level 3 equity securities for the six months ended June 30, 2026.
The Corporation acquired a Level 3 AFS debt security upon the acquisition of American National on April 1, 2026. The security was valued at $2.1 million and no related adjustments to fair value have been recorded as of June 30, 2026.
The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall:
Fair Value
(in thousands)Fair Value HierarchyJune 30, 2026December 31, 2025
Assets
Individually evaluated loansLevel 3$48,296 $18,659 
OREO(a)
Level 21,397 770 
(a) These assets are held at lower of its carrying amount or fair value less cost to sell. Assets included here are those that were adjusted to fair value less cost to sell during the period.
The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements:
June 30, 2026Valuation TechniqueSignificant Unobservable InputRange of InputsWeighted Average Input Applied
Mortgage servicing rightsDiscounted cash flowOption adjusted spread5%-8%5%
Mortgage servicing rightsDiscounted cash flowConstant prepayment rate—%-100%8%
Individually evaluated loansDiscounted cash flowDiscount factor45%-45%45%
Individually evaluated loansMarket approachAppraisal / Cost to sell44%-80%53%
Interest rate lock commitments to originate residential mortgage loans held for saleDiscounted cash flowClosing ratio70%-100%92%
v3.26.1
Retirement Plans
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet participation requirements. The benefit allocations are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. As part of acquisition-related integration activities, employees who become eligible for participation in the RAP are generally provided service credit for their employment with the acquired institution for eligibility and vesting purposes.

The Corporation also provides legacy healthcare access to a limited group of retired employees from a previous acquisition in the Postretirement Plan. There are no other active retiree healthcare plans.
The components of net periodic pension benefit and net periodic cost for the RAP and Postretirement Plan were as follows:
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
RAP
Service cost$869 $810 $1,737 $1,619 
Interest cost2,749 2,814 5,499 5,628 
Expected return on plan assets(9,772)(9,809)(19,544)(19,619)
Amortization of prior service credit(44)(44)(89)(89)
Total net periodic pension benefit$(6,198)$(6,230)$(12,397)$(12,460)
Postretirement Plan
Interest cost$22 $26 $43 $53 
Amortization of prior service credit(19)(19)(38)(38)
Amortization of actuarial loss— 4 — 8 
Total net periodic cost$3 $12 $6 $23 
The components of net periodic pension benefit and net periodic cost, other than the service cost component, are included in the other noninterest expense caption of the consolidated statements of income. The service cost component is included in the personnel noninterest expense caption of the consolidated statements of income.
The Corporation’s funding policy is to pay at least the minimum amount required by federal law and regulations, with consideration given to the maximum funding amounts allowed. The Corporation regularly reviews the funding of its RAP. There were no contributions during the six months ended June 30, 2026 or 2025.
v3.26.1
Segment Reporting
 3 Months Ended
Jun. 30, 2026
Segment Reporting [Abstract]  
Segment Reporting Segment Reporting
The Corporation is managed through operating segments based on our internal structure and management process, which is how we assess performance and allocate resources to the segments. Certain operating segments have been aggregated into our three reportable segments where the nature of the products and services, the type of customer, and the distribution of those products and services are similar. The three reportable segments are Corporate and Commercial Specialty; Community, Consumer, and
Business; and Risk Management and Shared Services. A description of the products and services and the related customers for each reportable segment can be found in the Segment Reporting note in the Corporation’s 2025 Annual Report on Form 10-K.
Effective beginning the first quarter of 2026, the Corporation made adjustments to both its FTP and expense allocation of shared services to its reportable segments to better align with how management assesses performance and allocates resources. These changes consisted of updates to the FTP methodology, including revisions to the funding curve and deposit assumptions; reassignment of certain branch locations based on the primary business activities supported by those branches; and revisions to the allocation of shared service expenses. The Corporation has recast prior period segment information to conform to the current period presentation.
The financial information of the Corporation’s segments disclosed below has been compiled utilizing the accounting policies described in the Corporation’s 2025 Annual Report on Form 10-K with certain exceptions based on internal management accounting policies. The significant exceptions are as follows:
The Corporation allocates certain net interest income, the provision for credit losses, certain noninterest expenses, and income taxes to each operating segment. Allocation methodologies are subject to periodic adjustment as the internal management accounting system is revised, the interest rate environment evolves, and business or product lines within the segments change. Also, because the development and application of these methodologies is a dynamic process, the financial results presented may be periodically reviewed.
The Corporation allocates certain net interest income using an internal FTP methodology that charges users of funds (assets, primarily loans) and credits providers of funds (liabilities, primarily deposits) based on the funding curve, maturity, prepayment, and other characteristics of the assets and liabilities. This allocation is reflected as net intersegment interest income (expense) in the accompanying tables.
The provision for credit losses is allocated to segments based on the expected long-term annual net charge off rates attributable to the credit risk of loans managed by the segment during the period. In contrast, the level of the consolidated provision for credit losses is determined based on an ACLL model using methodologies described in the Corporation’s 2025 Annual Report on Form 10-K.
The net effect of the above allocations is recorded within the Risk Management and Shared Services segment to ensure consolidated totals reflect the Corporation's consolidated financial information.
Indirect expenses incurred by the Corporation's centralized support functions - including facilities, information technology, finance, and corporate risk management - are allocated to reportable segments based on actual usage, such as transaction volumes or FTEs, as well as other relevant drivers that reflect consumption of those services. Because these allocations are based on estimated activity levels, individual period results may reflect variability in the distribution of indirect expenses among segments. Certain corporate-level expenses, including acquisition-related costs, integration expenses, and gains or losses on the disposition of branches or business units, are not allocated and remain in the Risk Management and Shared Services segment. These allocations are reflected as allocated indirect expense in the accompanying tables.
Income tax expense (benefit) is allocated to segments based on the Corporation’s estimated effective tax rate, with certain segments adjusted for any tax-exempt income or non-deductible expenses.
Financial information about the Corporation’s segments is presented below:
Three Months Ended June 30, 2026
(in thousands)Corporate and Commercial SpecialtyCommunity, Consumer and BusinessRisk Management and Shared ServicesConsolidated Corporation
Net segment interest income$267,324 $86,481 $16,234 $370,039 
Net intersegment interest (expense) income(105,641)136,046 (30,405)— 
Net interest income (expense)161,683 222,527 (14,171)370,039 
Noninterest income15,648 56,437 8,313 80,398 
Total income (expense) before provision177,331 278,964 (5,858)450,437 
Provision for credit losses21,287 6,456 (8,355)19,388 
Total income after provision156,044 272,508 2,497 431,049 
Noninterest expense
Personnel24,595 65,456 71,117 161,168 
Technology(a)
1,293 13,853 17,721 32,867 
Occupancy(a)
255 8,405 5,431 14,091 
Business development and advertising1,128 839 6,581 8,548 
Equipment(a)
6 2,319 3,098 5,423 
Legal and professional 272 1,478 15,704 17,454 
Loan and foreclosure costs233 1,296 23 1,552 
FDIC assessment— — 10,595 10,595 
Other intangible amortization— — 6,894 6,894 
Other noninterest expense1,087 10,376 1,827 13,290 
Allocated indirect expense (income)29,531 70,523 (100,054)— 
Total noninterest expense58,400 174,545 38,937 271,882 
Net income (loss) before income taxes97,644 97,963 (36,440)159,167 
Income tax expense17,567 20,676 (2,640)35,603 
Net income (loss)$80,077 $77,287 $(33,800)$123,564 
Loans$21,736,674 $14,231,238 $499,128 $36,467,040 
Allocated goodwill556,343 590,738 — 1,147,081 
Total assets22,552,085 15,452,018 13,808,403 51,812,506 
(a) A portion of total depreciation expense of $0.2 million, $6.3 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.
Three Months Ended June 30, 2025
(in thousands)Corporate and Commercial SpecialtyCommunity, Consumer and BusinessRisk Management and Shared ServicesConsolidated Corporation
Net segment interest income (expense)$242,978 $68,871 $(11,849)$300,000 
Net intersegment interest (expense) income(107,337)143,478 (36,141)— 
Net interest income (expense)135,641 212,349 (47,990)300,000 
Noninterest income11,984 51,481 3,512 66,977 
Total income (expense) before provision147,625 263,830 (44,478)366,977 
Provision for credit losses20,369 6,363 (8,736)17,996 
Total income (expense) after provision127,256 257,467 (35,742)348,981 
Noninterest expense
Personnel20,149 56,641 50,204 126,994 
Technology(a)
842 12,903 12,763 26,508 
Occupancy(a)
190 7,386 5,068 12,644 
Business development and advertising1,252 968 5,528 7,748 
Equipment(a)
6 2,301 2,187 4,494 
Legal and professional221 529 5,924 6,674 
Loan and foreclosure costs261 1,171 1,273 2,705 
FDIC assessment— — 9,708 9,708 
Other intangible amortization— — 2,203 2,203 
Other noninterest expense934 8,024 716 9,674 
Allocated indirect expense (income)32,166 63,408 (95,574)— 
Total noninterest expense56,021 153,331 — 209,352 
Net income (loss) before income taxes71,236 104,137 (35,744)139,629 
Income tax expense (benefit)13,211 21,869 (6,681)28,399 
Net income (loss)$58,025 $82,268 $(29,063)$111,230 
Loans$17,617,892 $12,531,178 $458,535 $30,607,605 
Allocated goodwill525,836 579,156 — 1,104,992 
Total assets17,907,721 13,043,969 13,042,039 43,993,729 
a) A portion of total depreciation expense of $0.1 million, $5.9 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.
v3.26.1
Accumulated Other Comprehensive Income (Loss)
 6 Months Ended
Jun. 30, 2026
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss)
The following table summarizes the components of accumulated other comprehensive income (loss) at June 30, 2026 and 2025, including changes during the preceding six and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):
(in thousands)Investment
Securities		Cash Flow Hedge DerivativesDefined Benefit
Pension and
Postretirement
Obligations		Accumulated
Other
Comprehensive
Income (Loss)
Balance December 31, 2025
$(2,456)$12,894 $(18,003)$(7,566)
Other comprehensive loss before reclassifications(73,377)— — (73,377)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities
3,590 — — 3,590 
Other assets / accrued expenses and other liabilities— (14,418)— (14,418)
Interest expense— (1,343)— (1,343)
Personnel expense— — (126)(126)
Income tax benefit (expense)17,407 (3,792)31 13,647 
Net other comprehensive loss during period(52,380)(19,553)(95)(72,027)
Balance June 30, 2026$(54,836)$(6,659)$(18,098)$(79,593)
Balance December 31, 2024
$(48,993)$(1,268)$(24,154)$(74,416)
Other comprehensive income before reclassifications53,149 — 4,770 57,919 
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities
3,986 — — 3,986 
Other assets / accrued expenses and other liabilities— 8,532 — 8,532 
Interest income— 2,555 — 2,555 
Personnel expense— — (126)(126)
Other expense— — (8)(8)
Income tax (expense) benefit(14,251)2,668 (1,157)(12,740)
Net other comprehensive income during period42,884 13,755 3,480 60,119 
Balance June 30, 2025$(6,109)$12,487 $(20,674)$(14,297)
v3.26.1
Subsequent Events
 3 Months Ended
Jun. 30, 2026
Subsequent Events [Abstract]  
Subsequent Events Subsequent Events
On April 1, 2026, the Corporation completed its previously announced acquisition of American National pursuant to the terms of the Merger Agreement by and between Associated and American National.
Pursuant to the Merger Agreement, (i) American National merged with and into Associated Banc-Corp, with Associated Banc-Corp continuing as the surviving corporation, and (ii) following such merger, American National Bank, a national banking association and wholly owned subsidiary of American National, merged with and into the Bank, with the Bank continuing as the surviving bank.
At the effective time of the merger, the outstanding shares of voting common stock and non-voting common stock of American National outstanding immediately prior to the effective time of the merger, other than certain shares held by the Corporation or American National, were converted into the right to receive an aggregate 22,975,382 shares of common stock of the Corporation. This represented 36.250 shares of the Corporation's common stock for each share of outstanding common stock of American National; with cash paid in lieu of fractional shares. Total consideration for the acquisition was 594.1 million valued at the acquisition date fair value of 25.86 per share.
American National operated 33 branches across Nebraska, Minnesota and Iowa, with a concentration in the Greater Omaha and Minneapolis / St. Paul metro markets. As a result of the acquisition, the Corporation will increase its deposit market share and deliver its products and services to an expanded client base across attractive Midwest markets. As of March 31, 2026, American National had total assets of 5.2 billion, total loans of 3.8 billion and total deposits of 4.5 billion.
The acquisition of American National will be accounted for as a business combination using the acquisition method of accounting in accordance with FASB ASC Topic 805, Business Combinations, which requires assets acquired and liabilities assumed to be recognized at fair value as of the acquisition date. Due to the timing of the acquisition, the initial accounting for the acquisition has not been completed. The Corporation expects to finalize the valuation and complete the purchase price allocation as soon as practicable.
v3.26.1
Insider Trading Arrangements
 3 Months Ended
Jun. 30, 2026
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
v3.26.1
Summary of Significant Accounting Policies (Policies)
 6 Months Ended
Jun. 30, 2026
Accounting Standards Update and Change in Accounting Principle [Abstract]  
Future Accounting Pronouncements
Future Accounting Pronouncements
The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review.
StandardDescriptionDate of Anticipated AdoptionEffect on Financial Statements
ASU 2024-03 Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40)The amendments in this update require a public business entity to disclose specific information about certain costs and expenses in the notes to its financial statements for interim and annual reporting periods. The objective of the disclosure requirements is to provide disaggregated information about a public business entity's expenses to help investors (a) better understand the entity's performance, (b) better assess the entity's prospects for future cash flows, and (c) compare an entity's performance over time and with that of other entities. Annual period ending December 31, 2027 and subsequent interim periodsThe Corporation is currently evaluating the impact on its disclosures.
ASU 2025-06 Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)The amendments in this update simplify the capitalization guidance by removing all references to prescriptive and sequential software development stages to align with the shift to incremental and iterative software development methods.Interim period ending March 31, 2028 and subsequent periodsThe Corporation is currently evaluating the impact on its disclosures.
v3.26.1
Business Combinations, Asset Acquisitions, Transaction between Entities under Common Control, and Joint Venture Formation (Tables)
 6 Months Ended
Apr. 01, 2026
Jun. 30, 2026
Business Combination [Abstract]    
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the effective date of the American National acquisition.
(in thousands)April 1, 2026
Total Consideration$594,144 
Assets
Cash and cash equivalents$220,898 
Investment securities989,925 
Loans, net3,716,472 
Other intangible assets(a)
103,200 
Other assets155,960 
Total assets$5,186,455 
Liabilities
Deposits$4,544,700 
Other liabilities89,700 
Total liabilities$4,634,400 
Fair value of net assets acquired$552,055 
Goodwill$42,089 
(a) Core deposit intangibles
  
Schedule Of Financing Receivables Purchased Seasoned Loans [Table Text Block] The following table includes the fair value and unpaid principal balance of the acquired loans and leases:
(in thousands)Unpaid principal balancePremium
(Discount)		Loans and leasesAllowance for credit losses on loansLoans and leases, net
Non-PCD loans$3,185,647 $2,692 $3,188,339 $(28,263)$3,160,076 
PCD Loans615,403 (19,495)595,908 (39,512)556,396 
Total$3,801,050 $(16,803)$3,784,247 $(67,775)$3,716,472 
  
Business Combination, Separately Recognized Transaction [Table Text Block]   The following table presents merger related costs, and the line item that these costs are included in on the consolidated statement of income, for the three and six months ended June 30, 2026. Additional transaction and integration costs will be expensed in future periods as incurred.
(in thousands)Three Months Ended June 30, 2026Six Months Ended Jun 30, 2026
Personnel$13,364 $13,364 
Technology781 781 
Occupancy23 103 
Business development and advertising417 654 
Equipment98 98 
Legal and professional9,569 10,253 
Other217 223 
Total$24,469 $25,476 
Business Combination, Pro Forma Information [Table Text Block]  
Pro Forma Financial Information
The following unaudited pro forma summary presents consolidated information of the Corporation as if the American National acquisition had occurred on January 1, 2025. The amounts do not reflect anticipated operating cost savings, revenue enhancements, or other synergies expected to result from the acquisition. Actual results may differ from the unaudited pro forma information presented.
Three Months Ended Jun 30,Six Months Ended Jun 30,
(Unaudited) (in thousands)2026202520262025
Net interest income and noninterest income$447,151 $415,810 $881,852 $807,328 
Net income141,691 120,532 263,217 212,961 
Business Combination, Pro Forma Information, Nonrecurring Adjustment [Table Text Block]   The pro forma adjustments include the effect of excluding acquisition-related expenses of $25.5 million for the six months ended June 30, 2026 and included such expenses in the first half of 2025. These adjustments also include adjusting amortization and accretion of fair value marks on acquired loans, investments, deposits, intangibles, other assets/liabilities, and the effect of income taxes.
v3.26.1
Earnings Per Common Share (Tables)
 6 Months Ended
Jun. 30, 2026
Earnings Per Share [Abstract]  
Calculations for basic and diluted earnings per common share Presented below are the calculations for basic and diluted earnings per common share:
Three Months Ended Jun 30,Six Months Ended Jun 30,
 (in thousands, except per share data)2026202520262025
Net income$123,564 $111,230 $243,200 $212,916 
Preferred stock dividends(2,875)(2,875)(5,750)(5,750)
Net income available to common equity120,689 108,355 237,450 207,166 
Common shareholder dividends(45,634)(38,304)(85,577)(76,636)
Unvested share-based payment awards(107)(194)(223)(399)
Undistributed earnings$74,948 $69,857 $151,650 $130,131 
Undistributed earnings allocated to common shareholders$74,769 $69,501 $151,203 $129,500 
Undistributed earnings allocated to unvested share-based payment awards179 356 447 630 
Undistributed earnings$74,948 $69,857 $151,650 $130,131 
Basic
Distributed earnings to common shareholders$45,634 $38,304 $85,577 $76,636 
Undistributed earnings allocated to common shareholders74,769 69,501 151,203 129,500 
Total common shareholders earnings, basic$120,403 $107,805 $236,780 $206,137 
Diluted
Distributed earnings to common shareholders$45,634 $38,304 $85,577 $76,636 
Undistributed earnings allocated to common shareholders74,769 69,501 151,203 129,500 
Total common shareholders earnings, diluted$120,403 $107,805 $236,780 $206,137 
Weighted average common shares outstanding188,084 164,936 176,654 165,081 
Effect of dilutive common stock awards1,815 1,407 1,748 1,425 
Diluted weighted average common shares outstanding189,899 166,343 178,402 166,506 
Basic earnings per common share$0.64 $0.65 $1.34 $1.25 
Diluted earnings per common share$0.63 $0.65 $1.33 $1.24 
v3.26.1
Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
A summary of the Corporation’s stock option activity for the six months ended June 30, 2026 is presented below:
Stock Options
Shares(a)
Weighted Average
Exercise Price		Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value(a)
Outstanding at December 31, 20251,460 $22.71 2.52 years$4,483 
Exercised444 23.78 
Outstanding at June 30, 20261,016 $22.24 2.43 years$8,658 
Options Exercisable at June 30, 20261,016 $22.24 2.43 years$8,658 
(a) In thousands
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
The following table summarizes information about the Corporation’s restricted stock activity for the six months ended June 30, 2026:
Restricted Stock
Shares(a)
Weighted Average
Grant Date Fair Value
Outstanding at December 31, 20252,372 $22.02 
Granted897 26.49 
Vested849 22.01 
Forfeited47 24.42 
Outstanding at June 30, 20262,373 $23.66 
(a) In thousands
v3.26.1
Investment Securities (Tables)
 6 Months Ended
Jun. 30, 2026
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] The amortized cost and fair values of AFS and HTM securities at June 30, 2026 were as follows:
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)$7,342 $4 $(106)$7,240 
Residential mortgage-related securities:
FNMA/FHLMC142,709 815 (6,236)137,288 
GNMA5,518,890 2,481 (29,723)5,491,648 
Commercial mortgage-related securities:
FNMA/FHLMC414,880 — (4,659)410,221 
GNMA111,910 — (5,066)106,844 
Asset backed securities:
FFELP89,197 1 (986)88,212 
SBA120,221 387 (538)120,070 
Other debt securities(a)
6,750 — (1,687)5,063 
Total AFS investment securities$6,411,899 $3,688 $(49,001)$6,366,586 
HTM investment securities
U.S. Treasury securities$997 $5 $— $1,002 
Obligations of state and political subdivisions (municipal securities)1,591,681 1,797 (124,874)1,468,604 
Residential mortgage-related securities:
FNMA/FHLMC790,729 39 (130,031)660,737 
GNMA37,215 18 (2,607)34,626 
Private-label292,007 — (45,547)246,460 
Commercial mortgage-related securities:
FNMA/FHLMC757,723 — (113,423)644,300 
GNMA40,423 — (4,334)36,089 
Total HTM investment securities$3,510,775 $1,859 $(420,816)$3,091,818 
(a)Unrealized losses includes allowance for credit losses
The amortized cost and fair values of AFS and HTM securities at December 31, 2025 were as follows:
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)$3,063 $1 $(20)$3,044 
Residential mortgage-related securities:
FNMA/FHLMC134,142 1,214 (5,493)129,863 
GNMA5,000,015 40,067 (253)5,039,829 
Commercial mortgage-related securities:
FNMA/FHLMC17,959 — (1,001)16,958 
GNMA113,374 — (3,818)109,556 
Asset backed securities:
FFELP95,977 19 (950)95,046 
SBA283 — (14)269 
Other debt securities3,000 — (2)2,998 
Total AFS investment securities$5,367,813 $41,301 $(11,551)$5,397,563 
HTM investment securities
U.S. Treasury securities$996 $19 $— $1,015 
Obligations of state and political subdivisions (municipal securities)1,628,088 3,070 (123,856)1,507,302 
Residential mortgage-related securities:
FNMA/FHLMC823,630 165 (127,333)696,462 
GNMA39,123 82 (2,321)36,884 
Private-label302,817 — (43,990)258,827 
Commercial mortgage-related securities:
FNMA/FHLMC763,370 — (113,004)650,366 
GNMA44,552 152 (4,566)40,138 
 Total HTM investment securities$3,602,576 $3,488 $(415,070)$3,190,994 
Debt Securities, Held-to-Maturity [Table Text Block] The amortized cost and fair values of AFS and HTM securities at June 30, 2026 were as follows:
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)$7,342 $4 $(106)$7,240 
Residential mortgage-related securities:
FNMA/FHLMC142,709 815 (6,236)137,288 
GNMA5,518,890 2,481 (29,723)5,491,648 
Commercial mortgage-related securities:
FNMA/FHLMC414,880 — (4,659)410,221 
GNMA111,910 — (5,066)106,844 
Asset backed securities:
FFELP89,197 1 (986)88,212 
SBA120,221 387 (538)120,070 
Other debt securities(a)
6,750 — (1,687)5,063 
Total AFS investment securities$6,411,899 $3,688 $(49,001)$6,366,586 
HTM investment securities
U.S. Treasury securities$997 $5 $— $1,002 
Obligations of state and political subdivisions (municipal securities)1,591,681 1,797 (124,874)1,468,604 
Residential mortgage-related securities:
FNMA/FHLMC790,729 39 (130,031)660,737 
GNMA37,215 18 (2,607)34,626 
Private-label292,007 — (45,547)246,460 
Commercial mortgage-related securities:
FNMA/FHLMC757,723 — (113,423)644,300 
GNMA40,423 — (4,334)36,089 
Total HTM investment securities$3,510,775 $1,859 $(420,816)$3,091,818 
(a)Unrealized losses includes allowance for credit losses
The amortized cost and fair values of AFS and HTM securities at December 31, 2025 were as follows:
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)$3,063 $1 $(20)$3,044 
Residential mortgage-related securities:
FNMA/FHLMC134,142 1,214 (5,493)129,863 
GNMA5,000,015 40,067 (253)5,039,829 
Commercial mortgage-related securities:
FNMA/FHLMC17,959 — (1,001)16,958 
GNMA113,374 — (3,818)109,556 
Asset backed securities:
FFELP95,977 19 (950)95,046 
SBA283 — (14)269 
Other debt securities3,000 — (2)2,998 
Total AFS investment securities$5,367,813 $41,301 $(11,551)$5,397,563 
HTM investment securities
U.S. Treasury securities$996 $19 $— $1,015 
Obligations of state and political subdivisions (municipal securities)1,628,088 3,070 (123,856)1,507,302 
Residential mortgage-related securities:
FNMA/FHLMC823,630 165 (127,333)696,462 
GNMA39,123 82 (2,321)36,884 
Private-label302,817 — (43,990)258,827 
Commercial mortgage-related securities:
FNMA/FHLMC763,370 — (113,004)650,366 
GNMA44,552 152 (4,566)40,138 
 Total HTM investment securities$3,602,576 $3,488 $(415,070)$3,190,994 
Investments Classified by Contractual Maturity Date [Table Text Block] The expected maturities of AFS and HTM securities at June 30, 2026, are shown below:
AFSHTM
(in thousands)Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Due in one year or less$3,750 $2,063 $820,235 $818,331 
Due after one year through five years7,739 7,655 825 779 
Due after five years through ten years— — 8,078 7,932 
Due after ten years2,603 2,585 763,540 642,564 
Total municipal, U.S. Treasury and other debt securities14,092 12,303 1,592,678 1,469,606 
Residential mortgage-related securities:
FNMA/FHLMC142,709 137,288 790,729 660,737 
GNMA5,518,890 5,491,648 37,215 34,626 
Private-label— — 292,007 246,460 
Commercial mortgage-related securities:
FNMA/FHLMC414,880 410,221 757,723 644,300 
GNMA111,910 106,844 40,423 36,089 
Asset backed securities:
FFELP 89,197 88,212 — — 
SBA120,221 120,070 — — 
Total investment securities$6,411,899 $6,366,586 $3,510,775 $3,091,818 
Ratio of fair value to amortized cost99.3 %88.1 %
Schedule of Realized Gain (Loss) [Table Text Block]
The following table summarizes gross realized gains and losses on AFS securities, the gain or loss on sale and fair value adjustment of equity securities, and proceeds from the sale of AFS investment securities:
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Gross losses on HTM securities$— $— $(4)$— 
Fair value adjustment of equity securities35 7 10 11 
Investment securities (losses) gains, net$35 $7 $6 $11 
Schedule of Unrealized Loss on Investments [Table Text Block]
The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2026:
Less than 12 months12 months or moreTotal
(in thousands)Number
of
Securities		Unrealized
Losses		Fair
Value		Number
of
Securities		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)4 $(99)$4,176 1 $(7)$243 $(106)$4,419 
Residential mortgage-related securities:
FNMA/FHLMC34 (604)47,975 5 (5,632)44,189 (6,236)92,164 
GNMA236 (29,685)4,396,013 2 (38)1,901 (29,723)4,397,914 
Commercial mortgage-related securities:
FNMA/FHLMC11 (3,780)393,331 1 (879)16,889 (4,659)410,220 
GNMA— — — 15 (5,066)106,844 (5,066)106,844 
Asset backed securities:
FFELP2 (75)30,893 12 (911)51,501 (986)82,394 
SBA6 (526)89,501 2 (12)183 (538)89,684 
Other debt securities(a)
3 (1,687)4,062 — — — (1,687)4,062 
Total296 $(36,456)$4,965,951 38 $(12,545)$221,750 $(49,001)$5,187,701 
HTM investment securities
Obligations of state and political subdivisions (municipal securities)327 $(6,876)$500,662 407 $(117,998)$615,514 $(124,874)$1,116,176 
Residential mortgage-related securities:
FNMA/FHLMC15 (127)15,968 100 (129,904)637,637 (130,031)653,605 
GNMA4 (60)5,330 79 (2,547)26,571 (2,607)31,901 
Private-label— — — 18 (45,547)246,460 (45,547)246,460 
 Commercial mortgage-related securities:
FNMA/FHLMC2 (536)26,155 43 (112,887)618,145 (113,423)644,300 
GNMA— — — 13 (4,334)36,088 (4,334)36,088 
Total348 $(7,599)$548,115 660 $(413,217)$2,180,415 $(420,816)$2,728,530 
(a)Unrealized losses includes allowance for credit losses
For comparative purposes, the following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2025:
Less than 12 months12 months or moreTotal
(in thousands)Number
of
Securities		Unrealized
Losses		Fair
Value		Number
of
Securities		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value
AFS investment securities
Obligations of state and political subdivisions (municipal securities)— $— $— 2 $(20)$863 $(20)$863 
Residential mortgage-related securities:
FNMA/FHLMC12 (95)14,155 12 (5,398)56,215 (5,493)70,370 
GNMA16 (232)143,734 3 (21)2,674 (253)146,408 
Commercial mortgage-related securities:
FNMA/FHLMC— — — 1 (1,001)16,958 (1,001)16,958 
GNMA— — — 15 (3,818)109,556 (3,818)109,556 
Asset backed securities:
FFELP2 (152)33,239 12 (798)55,565 (950)88,804 
SBA— — — 2 (14)231 (14)231 
Other debt securities2 (2)1,998 — — — (2)1,998 
Total32 $(481)$193,126 47 $(11,070)$242,062 $(11,551)$435,188 
HTM investment securities
Obligations of state and political subdivisions (municipal securities)81 $(2,978)$89,826 543 $(120,878)$842,485 $(123,856)$932,311 
Residential mortgage-related securities:
FNMA/FHLMC1 — 30 102 (127,333)676,915 (127,333)676,945 
GNMA— — — 80 (2,321)30,237 (2,321)30,237 
Private-label— — — 18 (43,990)258,827 (43,990)258,827 
Commercial mortgage-related securities:
FNMA/FHLMC2 (470)26,287 43 (112,534)624,079 (113,004)650,366 
GNMA— — — 13 (4,566)40,138 (4,566)40,138 
Total84 $(3,448)$116,143 799 $(411,622)$2,472,681 $(415,070)$2,588,824 
v3.26.1
Loans Loans (Tables)
 6 Months Ended
Jun. 30, 2026
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
The period end loan composition was as follows:
(in thousands)Jun 30, 2026Dec 31, 2025
Commercial and industrial$13,750,175 $11,799,757 
Commercial real estate — owner occupied1,575,445 1,186,324 
Commercial and business lending15,325,620 12,986,081 
Commercial real estate — investor6,492,950 5,246,030 
Real estate construction2,546,186 1,994,642 
Commercial real estate lending9,039,136 7,240,672 
Total commercial24,364,756 20,226,753 
Residential mortgage6,808,398 6,793,957 
Auto finance4,044,416 3,106,498 
Home equity826,343 713,271 
Other consumer423,127 323,135 
Total consumer12,102,284 10,936,861 
Total loans$36,467,040 $31,163,614 
Financing Receivable Credit Quality Indicators [Table Text Block]
The following table presents loans by credit quality indicator by origination year at June 30, 2026:
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost BasisYTD 20262025202420232022PriorTotal
Commercial and industrial:
Risk rating:
Pass$3,199 $2,741,443 $2,328,388 $3,787,950 $1,722,490 $982,648 $840,913 $738,339 $13,142,171 
Special mention— 22,708 626 26,761 24,508 9,346 5,458 72,581 161,988 
Substandard668 94,753 38,835 33,522 32,732 12,846 130,614 58,326 401,628 
Nonaccrual20 635 2,160 27,179 4,617 4,506 474 4,817 44,388 
Commercial and industrial$3,887 $2,859,539 $2,370,009 $3,875,412 $1,784,347 $1,009,346 $977,459 $874,063 $13,750,175 
Commercial real estate - owner occupied:
Risk rating:
Pass$— $182,249 $129,676 $247,821 $199,462 $146,763 $197,576 $380,833 $1,484,380 
Special mention— 1,363 — 4,713 5,016 2,059 90 5,980 19,221 
Substandard— 11,913 1,886 2,097 14,611 14,693 47 23,342 68,589 
Nonaccrual— — — 1,797 — — 524 934 3,255 
Commercial real estate - owner occupied$— $195,525 $131,562 $256,428 $219,089 $163,515 $198,237 $411,089 $1,575,445 
Commercial and business lending:
Risk rating:
Pass$3,199 $2,923,692 $2,458,064 $4,035,771 $1,921,952 $1,129,411 $1,038,489 $1,119,172 $14,626,551 
Special mention— 24,071 626 31,474 29,524 11,405 5,548 78,561 181,209 
Substandard668 106,666 40,721 35,619 47,343 27,539 130,661 81,668 470,217 
Nonaccrual20 635 2,160 28,976 4,617 4,506 998 5,751 47,643 
Commercial and business lending$3,887 $3,055,064 $2,501,571 $4,131,840 $2,003,436 $1,172,861 $1,175,696 $1,285,152 $15,325,620 
Commercial real estate - investor:
Risk rating:
Pass$— $695,209 $1,061,877 $1,762,223 $662,819 $438,221 $679,245 $844,791 $6,144,385 
Special mention— 633 33,369 5,553 3,066 48,292 58,136 29,885 178,934 
Substandard— 21,867 10,855 12,186 24,000 5,783 54,229 29,527 158,447 
Nonaccrual— 698 — 793 — — 7,914 1,779 11,184 
Commercial real estate - investor$— $718,407 $1,106,101 $1,780,755 $689,885 $492,296 $799,524 $905,982 $6,492,950 
Real estate construction:
Risk rating:
Pass$— $219,286 $161,036 $541,782 $872,017 $152,821 $3,414 $6,963 $1,957,319 
Special mention— 2,663 — — 15,405 — 75,656 — 93,724 
Substandard— 25,497 80,123 105,451 7,685 34,493 238,920 — 492,169 
Nonaccrual— 2,913 — — — 38 — 23 2,974 
Real estate construction$— $250,359 $241,159 $647,233 $895,107 $187,352 $317,990 $6,986 $2,546,186 
Commercial real estate lending:
Risk rating:
Pass$— $914,495 $1,222,913 $2,304,005 $1,534,836 $591,042 $682,659 $851,754 $8,101,704 
Special mention— 3,296 33,369 5,553 18,471 48,292 133,792 29,885 272,658 
Substandard— 47,364 90,978 117,637 31,685 40,276 293,149 29,527 650,616 
Nonaccrual— 3,611 — 793 — 38 7,914 1,802 14,158 
Commercial real estate lending$— $968,766 $1,347,260 $2,427,988 $1,584,992 $679,648 $1,117,514 $912,968 $9,039,136 
Total commercial:
Risk rating:
Pass$3,199 $3,838,187 $3,680,977 $6,339,776 $3,456,788 $1,720,453 $1,721,148 $1,970,926 $22,728,255 
Special mention— 27,367 33,995 37,027 47,995 59,697 139,340 108,446 453,867 
Substandard668 154,030 131,699 153,256 79,028 67,815 423,810 111,195 1,120,833 
Nonaccrual20 4,246 2,160 29,769 4,617 4,544 8,912 7,553 61,801 
Total commercial$3,887 $4,023,830 $3,848,831 $6,559,828 $3,588,428 $1,852,509 $2,293,210 $2,198,120 $24,364,756 
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost BasisYTD 20262025202420232022PriorTotal
Residential mortgage:
Risk rating:
Pass$— $— $176,272 $309,720 $254,049 $438,829 $1,461,192 $4,090,505 $6,730,567 
Special mention— — — 315 — — — 188 503 
Substandard— — 5,355 — 572 366 454 246 6,993 
Nonaccrual— — — 2,054 4,408 7,680 11,041 45,152 70,335 
Residential mortgage$— $— $181,627 $312,089 $259,029 $446,875 $1,472,687 $4,136,091 $6,808,398 
Auto finance:
Risk rating:
Pass$— $— $856,927 $1,398,649 $867,078 $498,862 $351,555 $57,048 $4,030,119 
Special mention— — 84 1,032 581 868 625 134 3,324 
Nonaccrual— — 393 1,686 2,058 3,351 3,083 402 10,973 
Auto finance$— $— $857,404 $1,401,367 $869,717 $503,081 $355,263 $57,584 $4,044,416 
Home equity:
Risk rating:
Pass$11,561 $726,750 $1,158 $5,253 $3,937 $4,886 $21,268 $55,324 $818,576 
Special mention78 102 — — 130 — 39 914 1,185 
Nonaccrual272 317 — 102 151 159 1,025 4,828 6,582 
Home equity$11,911 $727,169 $1,158 $5,355 $4,218 $5,045 $22,332 $61,066 $826,343 
Other consumer:
Risk rating:
Pass$84 $260,894 $36,667 $44,583 $18,197 $10,311 $5,627 $43,888 $420,167 
Special mention1 885 — 17 62 47 45 9 1,065 
Substandard— 1,633 — — — — — — 1,633 
Nonaccrual— 47 — 60 47 41 53 14 262 
Other consumer$85 $263,459 $36,667 $44,660 $18,306 $10,399 $5,725 $43,911 $423,127 
Total consumer:
Risk rating:
Pass$11,645 $987,644 $1,071,024 $1,758,205 $1,143,261 $952,888 $1,839,642 $4,246,765 $11,999,429 
Special mention79 987 84 1,364 773 915 709 1,245 6,077 
Substandard— 1,633 5,355 — 572 366 454 246 8,626 
Nonaccrual272 364 393 3,902 6,664 11,231 15,202 50,396 88,152 
Total consumer$11,996 $990,628 $1,076,856 $1,763,471 $1,151,270 $965,400 $1,856,007 $4,298,652 $12,102,284 
Total loans:
Risk rating:
Pass$14,844 $4,825,831 $4,752,001 $8,097,981 $4,600,049 $2,673,341 $3,560,790 $6,217,691 $34,727,684 
Special mention79 28,354 34,079 38,391 48,768 60,612 140,049 109,691 459,944 
Substandard668 155,663 137,054 153,256 79,600 68,181 424,264 111,441 1,129,459 
Nonaccrual292 4,610 2,553 33,671 11,281 15,775 24,114 57,949 149,953 
Total loans$15,883 $5,014,458 $4,925,687 $8,323,299 $4,739,698 $2,817,909 $4,149,217 $6,496,772 $36,467,040 
(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.
The following table presents loans by credit quality indicator by origination year at December 31, 2025:
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost Basis20252024202320222021PriorTotal
Commercial and industrial:
Risk rating:
Pass$503 $1,920,351 $3,886,880 $2,097,760 $1,133,873 $1,238,941 $521,793 $471,834 $11,271,432 
Special mention— 11,139 3,024 311 13,774 5,849 24,971 293 59,361 
Substandard7,290 65,451 60,593 78,773 22,126 162,841 70,231 1,771 461,786 
Nonaccrual1,473 — 25 7,153 — — — — 7,178 
Commercial and industrial$9,266 $1,996,941 $3,950,522 $2,183,997 $1,169,773 $1,407,631 $616,995 $473,898 $11,799,757 
Commercial real estate - owner occupied:
Risk rating:
Pass$— $2,957 $241,141 $180,867 $141,254 $167,496 $157,837 $201,588 $1,093,140 
Special mention— — — 11,620 5,432 — — 1,242 18,294 
Substandard— 13,445 7,478 14,001 15,635 1,691 11,929 10,508 74,687 
Nonaccrual— — 203 — — — — — 203 
Commercial real estate - owner occupied$— $16,402 $248,822 $206,488 $162,321 $169,187 $169,766 $213,338 $1,186,324 
Commercial and business lending:
Risk rating:
Pass$503 $1,923,308 $4,128,021 $2,278,627 $1,275,127 $1,406,437 $679,630 $673,422 $12,364,572 
Special mention— 11,139 3,024 11,931 19,206 5,849 24,971 1,535 77,655 
Substandard7,290 78,896 68,071 92,774 37,761 164,532 82,160 12,279 536,473 
Nonaccrual1,473 — 228 7,153 — — — — 7,381 
Commercial and business lending$9,266 $2,013,343 $4,199,344 $2,390,485 $1,332,094 $1,576,818 $786,761 $687,236 $12,986,081 
Commercial real estate - investor:
Risk rating:
Pass$3,195 $185,825 $1,842,395 $776,187 $503,511 $711,947 $432,442 $503,468 $4,955,775 
Special mention— — 40,067 11,135 14,809 58,523 26,964 5,007 156,505 
Substandard— — 24,090 1,446 7,741 70,608 17,633 3,921 125,439 
Nonaccrual— — — 546 — 7,765 — — 8,311 
Commercial real estate - investor$3,195 $185,825 $1,906,552 $789,314 $526,061 $848,843 $477,039 $512,396 $5,246,030 
Real estate construction:
Risk rating:
Pass$— $33,847 $359,610 $720,429 $223,239 $175,056 $2,991 $5,768 $1,520,940 
Special mention— — 20,611 — — 51,262 — — 71,873 
Substandard— — 122,320 42,511 48,980 187,874 — — 401,685 
Nonaccrual— — — — — — — 144 144 
Real estate construction$— $33,847 $502,541 $762,940 $272,219 $414,192 $2,991 $5,912 $1,994,642 
Commercial real estate lending:
Risk rating:
Pass$3,195 $219,672 $2,202,005 $1,496,616 $726,750 $887,003 $435,433 $509,236 $6,476,715 
Special mention— — 60,678 11,135 14,809 109,785 26,964 5,007 228,378 
Substandard— — 146,410 43,957 56,721 258,482 17,633 3,921 527,124 
Nonaccrual— — — 546 — 7,765 — 144 8,455 
Commercial real estate lending$3,195 $219,672 $2,409,093 $1,552,254 $798,280 $1,263,035 $480,030 $518,308 $7,240,672 
Term Loans Amortized Cost Basis by Origination Year(a)
(in thousands)
Rev Loans Converted to Term(a)
Rev Loans Amortized Cost Basis20252024202320222021PriorTotal
Total commercial:
Risk rating:
Pass$3,698 $2,142,980 $6,330,026 $3,775,243 $2,001,877 $2,293,440 $1,115,063 $1,182,658 $18,841,287 
Special mention— 11,139 63,702 23,066 34,015 115,634 51,935 6,542 306,033 
Substandard7,290 78,896 214,481 136,731 94,482 423,014 99,793 16,200 1,063,597 
Nonaccrual1,473 — 228 7,699 — 7,765 — 144 15,836 
Total commercial$12,461 $2,233,015 $6,608,437 $3,942,739 $2,130,374 $2,839,853 $1,266,791 $1,205,544 $20,226,753 
Residential mortgage:
Risk rating:
Pass$— $— $253,364 $238,787 $480,076 $1,488,335 $1,499,223 $2,764,379 $6,724,164 
Substandard— — — 580 292 129 300 — 1,301 
Nonaccrual— — 2,425 3,102 5,101 13,141 8,985 35,738 68,492 
Residential mortgage$— $— $255,789 $242,469 $485,469 $1,501,605 $1,508,508 $2,800,117 $6,793,957 
Auto finance:
Risk rating:
Pass$— $— $1,287,267 $842,838 $551,549 $388,064 $26,402 $2 $3,096,122 
Special mention— — 295 325 814 621 50 — 2,105 
Nonaccrual— — 559 1,356 2,811 3,255 290 — 8,271 
Auto finance$— $— $1,288,121 $844,519 $555,174 $391,940 $26,742 $2 $3,106,498 
Home equity:
Risk rating:
Pass$15,259 $623,853 $855 $2,188 $2,728 $20,514 $4,733 $49,793 $704,664 
Special mention315 52 — 119 190 104 — 368 833 
Nonaccrual1,038 173 2 221 333 1,016 414 5,615 7,774 
Home equity$16,612 $624,078 $857 $2,528 $3,251 $21,634 $5,147 $55,776 $713,271 
Other consumer:
Risk rating:
Pass$529 $255,490 $13,159 $4,070 $1,990 $958 $264 $43,575 $319,506 
Special mention12 1,139 27 — 5 9 — 20 1,200 
Substandard— 2,374 — — — — — — 2,374 
Nonaccrual2 35 — 3 12 — 2 3 55 
Other consumer$543 $259,038 $13,186 $4,073 $2,007 $967 $266 $43,598 $323,135 
Total consumer:
Risk rating:
Pass$15,788 $879,343 $1,554,645 $1,087,883 $1,036,343 $1,897,871 $1,530,622 $2,857,749 $10,844,456 
Special mention327 1,191 322 444 1,009 734 50 388 4,138 
Substandard— 2,374 — 580 292 129 300 — 3,675 
Nonaccrual1,040 208 2,986 4,682 8,257 17,412 9,691 41,356 84,592 
Total consumer$17,155 $883,116 $1,557,953 $1,093,589 $1,045,901 $1,916,146 $1,540,663 $2,899,493 $10,936,861 
Total loans:
Risk rating:
Pass$19,486 $3,022,323 $7,884,671 $4,863,126 $3,038,220 $4,191,311 $2,645,685 $4,040,407 $29,685,743 
Special mention327 12,330 64,024 23,510 35,024 116,368 51,985 6,930 310,171 
Substandard7,290 81,270 214,481 137,311 94,774 423,143 100,093 16,200 1,067,272 
Nonaccrual2,513 208 3,214 12,381 8,257 25,177 9,691 41,500 100,428 
Total loans$29,616 $3,116,131 $8,166,390 $5,036,328 $3,176,275 $4,755,999 $2,807,454 $4,105,037 $31,163,614 
(a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination.
The following table presents gross charge offs by origination year for the six months ended June 30, 2026:
Gross Charge Offs by Origination Year
(in thousands)Rev Loans Amortized Cost Basis20262025202420232022PriorTotal
Commercial and industrial$13,356 $135 $160 $254 $712 $425 $6,191 $21,233 
Commercial real estate-owner occupied— — — — — — — — 
Commercial and business lending13,356 135 160 254 712 425 6,191 21,233 
Commercial real estate-investor— — — — — — 2,710 2,710 
Real estate construction— — — — — — — — 
Commercial real estate lending— — — — — — 2,710 2,710 
Total commercial13,356 135 160 254 712 425 8,901 23,943 
Residential mortgage— — 6 57 66 24 107 260 
Auto finance— 110 1,125 1,135 1,547 1,742 179 5,838 
Home equity1 — 60 — 2 13 16 92 
Other consumer4,150 10 100 30 26 12 31 4,359 
Total consumer4,151 120 1,291 1,222 1,641 1,791 333 10,549 
Total gross charge offs$17,507 $255 $1,451 $1,476 $2,353 $2,216 $9,234 $34,492 
The following table presents gross charge offs by origination year for the year ended December 31, 2025:
Gross Charge Offs by Origination Year
(in thousands)Rev Loans Amortized Cost Basis20252024202320222021PriorTotal
Commercial and industrial$5,424 $831 $627 $3,555 $3,799 $379 $— $14,615 
Commercial real estate-owner occupied— — — 113 — — — 113 
Commercial and business lending5,424 831 627 3,668 3,799 379 — 14,728 
Commercial real estate-investor— — 8,356 184 12,666 — — 21,206 
Real estate construction— — — — — — — — 
Commercial real estate lending— — 8,356 184 12,666 — — 21,206 
Total commercial5,424 831 8,983 3,852 16,465 379 — 35,934 
Residential mortgage— — 115 209 320 74 430 1,148 
Auto finance— 432 1,699 2,804 3,384 433 — 8,752 
Home equity— — — 26 5 5 380 416 
Other consumer8,194 18 85 63 63 224 56 8,703 
Total consumer8,194 450 1,899 3,102 3,772 736 866 19,019 
Total gross charge offs$13,618 $1,281 $10,882 $6,954 $20,237 $1,115 $866 $54,953 
Financing Receivable, Past Due [Table Text Block]
The following table presents loans by past due status at June 30, 2026:
Accruing
(in thousands)Current30-59 Days
Past Due		60-89 Days
Past Due		90+ Days
Past Due
Nonaccrual(a)(b)
Total
Commercial and industrial$13,694,693 $834 $9,834 $426 $44,388 $13,750,175 
Commercial real estate - owner occupied1,571,158 893 — 139 3,255 1,575,445 
Commercial and business lending15,265,851 1,727 9,834 565 47,643 15,325,620 
Commercial real estate - investor6,478,677 1,839 1,250 — 11,184 6,492,950 
Real estate construction2,541,775 581 856 — 2,974 2,546,186 
Commercial real estate lending9,020,452 2,420 2,106 — 14,158 9,039,136 
Total commercial24,286,303 4,147 11,940 565 61,801 24,364,756 
Residential mortgage6,724,029 13,531 503 — 70,335 6,808,398 
Auto finance4,013,076 17,043 3,324 — 10,973 4,044,416 
Home equity815,225 3,351 1,185 — 6,582 826,343 
Other consumer(c)
418,154 1,899 1,089 1,723 262 423,127 
Total consumer11,970,484 35,824 6,101 1,723 88,152 12,102,284 
Total loans$36,256,787 $39,971 $18,041 $2,288 $149,953 $36,467,040 
(a) Of the total nonaccrual loans, $78.9 million, or 53%, were current with respect to payment at June 30, 2026.
(b) No interest income was recognized on nonaccrual loans for the three and six months ended June 30, 2026. In addition, there were $18.2 million of nonaccrual loans for which there was no related ACLL at June 30, 2026.
(c) Past due portions exclude guaranteed student loans.
The following table presents loans by past due status at December 31, 2025:
Accruing
(in thousands)Current30-59 Days
Past Due		60-89 Days
Past Due		90+ Days 
Past Due
Nonaccrual(a)(b)
Total
Commercial and industrial$11,789,526 $2,153 $530 $370 $7,178 $11,799,757 
Commercial real estate - owner occupied1,186,087 — 34 — 203 1,186,324 
Commercial and business lending12,975,613 2,153 564 370 7,381 12,986,081 
Commercial real estate - investor5,218,314 14,148 5,257 — 8,311 5,246,030 
Real estate construction1,994,381 117 — — 144 1,994,642 
Commercial real estate lending7,212,695 14,265 5,257 — 8,455 7,240,672 
Total commercial20,188,308 16,418 5,821 370 15,836 20,226,753 
Residential mortgage6,712,330 13,135 — — 68,492 6,793,957 
Auto finance3,081,782 14,340 2,105 — 8,271 3,106,498 
Home equity701,719 2,945 833 — 7,774 713,271 
Other consumer(c)
317,932 1,473 1,231 2,444 55 323,135 
Total consumer10,813,763 31,893 4,169 2,444 84,592 10,936,861 
Total loans$31,002,071 $48,311 $9,990 $2,814 $100,428 $31,163,614 
(a) Of the total nonaccrual loans, $31.2 million, or 31%, were current with respect to payment at December 31, 2025.
(b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2025. In addition, there were $14.6 million of nonaccrual loans for which there was no related ACLL at December 31, 2025
(c) Past due portions exclude guaranteed student loans.
Financing Receivable, Modified [Table Text Block]
The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at June 30, 2026 and June 30, 2025.
Interest Rate Concession
Amortized Cost
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Commercial and industrial$120 $154 $273 $294 
Other consumer727 737 1,330 1,529 
Total loans modified$847 $891 $1,603 $1,823 
Term Extension
Amortized Cost
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Residential mortgage$553 $305 $1,059 $305 
Combination - Interest Rate Concession and Term Extension
Amortized Cost
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Residential mortgage$1,137 $591 $3,463 $2,094 
Home equity37 67 88 125 
Total loans modified$1,174 $658 $3,551 $2,219 
The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans.
Interest Rate Concession
Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase(a)
Three Months Ended Jun 30,Six Months Ended Jun 30,
Loan Type2026202520262025
Commercial and industrial(22)%(23)%(22)%(24)%
Residential mortgage— %2 %1 %1 %
Home equity(2)%— %(2)%(2)%
Other consumer(22)%(21)%(21)%(21)%
Weighted average of total loans modified(9)%(10)%(6)%(8)%
(a) Some interest rate concessions may involve an increase in rate that was lower in comparison to prevailing market rates.
Term Extension
Financial Effect, Weighted Average Term Increase(a)
Three Months Ended Jun 30,Six Months Ended Jun 30,
Loan Type2026202520262025
Residential mortgage115 months165 months107 months152 months
Home equity240 months60 months131 months60 months
Weighted average of total loans modified118 months158 months107 months147 months
(a) During the three months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 300 to 418 months and 268 to 426 months, respectively. During the six months ended June 30, 2026 and June 30, 2025, term extensions changed the weighted average term on modified loans from 305 to 412 months and 267 to 414, respectively.
Financing Receivable, Modified, Past Due [Table Text Block] The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2026:
Payment Status (Amortized Cost Basis)
(in thousands)Current30-89 Days Past Due90+ Days Past Due
Commercial and industrial$367 $— $— 
Residential mortgage6,509 943 1,183 
Home equity239 — 27 
Other consumer2,055 — — 
Total loans modified$9,170 $943 $1,210 
The following table depicts the performance of loans that have been modified in the twelve months ended June 30, 2025:
Payment Status (Amortized Cost Basis)
(in thousands)Current30-89 Days Past Due90+ Days Past Due
Commercial and industrial$431 $— $— 
Residential mortgage3,406 605 702 
Home equity288 31 — 
Other consumer2,303 — — 
Total loans modified$6,427 $635 $702 
Financing Receivable, Modified, Subsequent Default [Table Text Block]
The following table provides the amortized cost of loan modifications by loan portfolio and type of concession for loans that were modified in the previous twelve months and subsequently had a payment default during the six months ended June 30, 2026:
Amortized Cost of Loan Modifications that Subsequently Defaulted
(in thousands)Interest Rate ConcessionTerm ExtensionCombination Interest Rate Reduction and Term Extension
Residential mortgage$— $— $303 
None of the loans modified in the previous twelve months subsequently had a payment default during the six months ended June 30, 2025.
Financing Receivable, Allowance for Credit Loss [Table Text Block]
The following table presents a summary of the changes in the ACLL by portfolio segment for the six months ended June 30, 2026:
(in thousands)Dec 31, 2025Provision for loan losses recorded at acquisitionAllowance for PCD loans acquiredAllowance for PSL acquiredCharge offsRecoveriesNet
(Charge offs) Recoveries		Provision for Credit LossesJun 30, 2026ACLL / Loans
Allowance for loan losses
Commercial and industrial$168,636 $294 $19,514 $5,086 $(21,233)$893 $(20,340)$29,105 $202,295 
Commercial real estate — owner occupied11,327 — 2,516 1,198 — — — (1,887)13,154 
Commercial and business lending179,963 294 22,030 6,284 (21,233)893 (20,340)27,218 215,449 
Commercial real estate — investor58,243 — 11,640 7,590 (2,710)500 (2,210)(10,475)64,788 
Real estate construction46,595 — 3,459 3,298 — 4 4 6,065 59,421 
Commercial real estate lending104,838 — 15,099 10,888 (2,710)504 (2,206)(4,410)124,209 
Total commercial284,801 294 37,129 17,172 (23,943)1,397 (22,546)22,808 339,658 
Residential mortgage33,644 — 790 1,028 (260)211 (49)39 35,452 
Auto finance27,470 — 1,346 7,241 (5,838)2,487 (3,351)2,059 34,765 
Home equity16,343 — 174 2,058 (92)782 690 (765)18,500 
Other consumer15,810 103 73 764 (4,359)1,104 (3,255)1,859 15,354 
Total consumer93,267 103 2,383 11,091 (10,549)4,584 (5,965)3,192 104,071 
Total loans$378,068 $397 $39,512 $28,263 $(34,492)$5,981 $(28,511)$26,000 $443,729 
Allowance for unfunded commitments
Commercial and industrial$18,698 $— $1,300 $689 $— $— $— $(1,650)$19,037 
Commercial real estate — owner occupied132 — 18 21 — — — 78 249 
Commercial and business lending18,830 — 1,318 710 — — — (1,572)19,286 
Commercial real estate — investor499 — 102 28 — — — 281 910 
Real estate construction17,947 — 2,169 901 — — — 5,243 26,260 
Commercial real estate lending18,446 — 2,271 929 — — — 5,524 27,170 
Total commercial37,276 — 3,589 1,639 — — — 3,952 46,456 
Home equity2,406 — 8 207 — — — 49 2,670 
Other consumer1,594 — — 25 — — — (1)1,618 
Total consumer4,000 — 8 232 — — — 48 4,288 
Total loans$41,276 $— $3,597 $1,871 $— $— $— $4,000 $50,744 
Allowance for credit losses on loans
Commercial and industrial$187,334 $294 $20,814 $5,775 $(21,233)$893 $(20,340)$27,455 $221,332 1.61 %
Commercial real estate — owner occupied11,459 — 2,534 1,219 — — — (1,809)13,403 0.85 %
Commercial and business lending198,793 294 23,348 6,994 (21,233)893 (20,340)25,646 234,735 1.53 %
Commercial real estate — investor58,742 — 11,742 7,618 (2,710)500 (2,210)(10,194)65,698 1.01 %
Real estate construction64,542 — 5,628 4,199 — 4 4 11,308 85,681 3.37 %
Commercial real estate lending123,284 — 17,370 11,817 (2,710)504 (2,206)1,114 151,379 1.67 %
Total commercial322,077 294 40,718 18,811 (23,943)1,397 (22,546)26,760 386,114 1.58 %
Residential mortgage33,644 — 790 1,028 (260)211 (49)39 35,452 0.52 %
Auto finance27,470 — 1,346 7,241 (5,838)2,487 (3,351)2,059 34,765 0.86 %
Home equity18,749 — 182 2,265 (92)782 690 (716)21,170 2.56 %
Other consumer17,404 103 73 789 (4,359)1,104 (3,255)1,858 16,972 4.01 %
Total consumer97,267 103 2,391 11,323 (10,549)4,584 (5,965)3,240 108,359 0.90 %
Total loans$419,344 $397 $43,109 $30,134 $(34,492)$5,981 $(28,511)$30,000 $494,473 1.36 %
The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2025:
(in thousands)Dec 31, 2024Charge offsRecoveriesNet
(Charge offs) Recoveries		Provision for Credit LossesDec 31, 2025ACLL / Loans
Allowance for loan losses
Commercial and industrial$136,596 $(14,615)$8,357 $(6,258)$38,298 $168,636 
Commercial real estate — owner occupied9,417 (113)— (113)2,023 11,327 
Commercial and business lending146,013 (14,728)8,357 (6,371)40,321 179,963 
Commercial real estate — investor71,547 (21,206)2,985 (18,221)4,917 58,243 
Real estate construction51,499 — 154 154 (5,058)46,595 
Commercial real estate lending123,046 (21,206)3,139 (18,067)(141)104,838 
Total commercial269,060 (35,934)11,496 (24,438)40,180 284,801 
Residential mortgage32,576 (1,148)615 (533)1,601 33,644 
Auto finance28,467 (8,752)3,029 (5,723)4,726 27,470 
Home equity16,620 (416)999 583 (860)16,343 
Other consumer16,823 (8,703)1,837 (6,866)5,853 15,810 
Total consumer94,486 (19,019)6,480 (12,539)11,320 93,267 
Total loans$363,545 $(54,953)$17,976 $(36,977)$51,500 $378,068 
Allowance for unfunded commitments
Commercial and industrial$14,456 $— $— $— $4,242 $18,698 
Commercial real estate — owner occupied151 — — — (19)132 
Commercial and business lending14,607 — — — 4,223 18,830 
Commercial real estate — investor578 — — — (79)499 
Real estate construction19,591 — — — (1,644)17,947 
Commercial real estate lending20,169 — — — (1,723)18,446 
Total commercial34,776 — — — 2,500 37,276 
Home equity2,465 — — — (59)2,406 
Other consumer1,535 — — — 59 1,594 
Total consumer4,000 — — — — 4,000 
Total loans$38,776 $— $— $— $2,500 $41,276 
Allowance for credit losses on loans
Commercial and industrial$151,052 $(14,615)$8,357 $(6,258)$42,540 $187,334 1.59 %
Commercial real estate — owner occupied9,568 (113)— (113)2,004 11,459 0.97 %
Commercial and business lending160,620 (14,728)8,357 (6,371)44,544 198,793 1.53 %
Commercial real estate — investor72,125 (21,206)2,985 (18,221)4,838 58,742 1.12 %
Real estate construction71,090 — 154 154 (6,702)64,542 3.24 %
Commercial real estate lending143,215 (21,206)3,139 (18,067)(1,864)123,284 1.70 %
Total commercial303,835 (35,934)11,496 (24,438)42,680 322,077 1.59 %
Residential mortgage32,576 (1,148)615 (533)1,601 33,644 0.50 %
Auto finance28,467 (8,752)3,029 (5,723)4,726 27,470 0.88 %
Home equity19,085 (416)999 583 (919)18,749 2.63 %
Other consumer18,358 (8,703)1,837 (6,866)5,912 17,404 5.39 %
Total consumer98,486 (19,019)6,480 (12,539)11,320 97,267 0.89 %
Total loans$402,322 $(54,953)$17,976 $(36,977)$54,000 $419,344 1.35 %
v3.26.1
Goodwill and Other Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets [Table Text Block] Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows:
(in thousands)Six Months Ended Jun 30, 2026Year Ended Dec 31, 2025
Core deposit intangibles
Gross carrying amount at the beginning of period$88,109 $88,109 
Additions during the period103,200 — 
Accumulated amortization(74,356)(65,260)
Net book value$116,953 $22,849 
Amortization during the period$9,096 $8,811 
Schedule of Servicing Assets at Fair Value [Table Text Block]
A summary of changes in the balance of the MSRs asset under the fair value measurement method is as follows:
(in thousands)Six Months Ended Jun 30, 2026Year Ended Dec 31, 2025
Mortgage servicing rights
Mortgage servicing rights at beginning of period$86,337 $87,683 
Additions6,159 8,716 
Decay(4,899)(8,621)
Valuation:
Changes in fair value of asset86 (1,441)
Mortgage servicing rights at end of period$87,683 $86,337 
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)$6,160,254 $6,191,012 
Mortgage servicing rights to servicing portfolio1.42 %1.39 %
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] The following table shows the estimated future yearly amortization expense for CDIs and decay for MSRs:
(in thousands)Core Deposit IntangiblesMortgage Servicing Rights
Six Months Ended December 31, 2026$13,788 $4,817 
202726,167 11,601 
202818,965 11,838 
202915,285 11,189 
203011,788 10,214 
20319,851 9,123 
Beyond 203121,109 28,901 
Total estimated amortization expense and MSRs decay(a)
$116,953 $87,683 
(a) Includes the decrease in value due to passage of time, including the impact from both regularly scheduled principal payments and partial loan paydowns.
v3.26.1
Short and Long-Term Funding (Tables)
 6 Months Ended
Jun. 30, 2026
Debt Disclosure [Abstract]  
Schedule of Debt [Table Text Block]
The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year):
(in thousands)June 30, 2026December 31, 2025
Short-term funding
Federal funds purchased$473,905 $260,070 
Securities sold under agreements to repurchase55,371 47,794 
Federal funds purchased and securities sold under agreements to repurchase$529,276 $307,864 
Long-term funding
Corporation senior notes, at par$300,000 $300,000 
Corporation subordinated notes, at par300,000 300,000 
Discount and capitalized costs(6,895)(7,484)
Subordinated debt fair value hedge(a)
(2,025)1,760 
Total long-term funding$591,080 $594,276 
   Total short and long-term funding, excluding FHLB advances$1,120,356 $902,140 
FHLB advances
Short-term FHLB advances$4,315,000 $2,855,250 
Long-term FHLB advances263,115 414,122 
FHLB advances fair value hedge(a)
(3,434)(1,278)
Total FHLB advances$4,574,681 $3,268,094 
Total short and long-term funding$5,695,037 $4,170,234 
(a) For additional information on the fair value hedges, see Note 10.
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]
The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets is presented in the following table:
Overnight and Continuous
(in thousands)June 30, 2026December 31, 2025
Repurchase agreements
Agency mortgage-related securities$55,371 $47,794 
v3.26.1
Derivative and Hedging Activities (Tables)
 6 Months Ended
Jun. 30, 2026
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges:
Line Item in the Consolidated Balance Sheets in Which the Hedged Item is Included
Carrying Amount of the Hedged Assets/(Liabilities)(a)
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)
Carrying Amount of the Hedged Assets/(Liabilities)(a)
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)
(in thousands)Jun 30, 2026Dec 31, 2025
Other long-term funding$(297,975)$2,025 $(301,760)$(1,760)
FHLB Advances(196,566)3,434 (198,722)1,278 
Total$(494,541)$5,459 $(500,482)$(482)

(a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At June 30, 2026 and December 31, 2025, the carrying amount excluded for foreign currency denominated loans was $318.0 million and $318.5 million, respectively.
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income:
Location and Amount Recognized on the Consolidated Statements of Income in
Fair Value and Cash Flow Hedging Relationships
Three Months Ended Jun 30,Six Months Ended Jun 30,
2026202520262025
(in thousands)Interest Income Interest (Expense)Interest IncomeInterest (Expense)Interest IncomeInterest (Expense)Interest IncomeInterest (Expense)
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value or cash flow hedges are recorded(a)
$565 $(380)$(1,464)$(1,942)$1,169 $(777)$(2,614)$(4,160)
The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20
Interest contracts:
Hedged items (31)2,952 (27)(4,099)(174)5,942 (58)(11,096)
Derivatives designated as hedging instruments(a)
597 (3,332)(1,437)2,158 1,343 (6,719)(2,555)6,936 
(a) Includes net settlements on the derivatives.
Location and Amount Recognized on the Consolidated Statements of Income in
Fair Value Hedging Relationships
Three Months Ended Jun 30,Six Months Ended Jun 30,
2026202520262025
(in thousands)Capital Markets, NetCapital Markets, NetCapital Markets, NetCapital Markets, Net
Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value hedges are recorded$51 $— $53 $1 
The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20
Foreign currency contracts:
Hedged items(13,163)19,542 (18,086)20,095 
Derivatives designated as hedging instruments13,214 (19,542)18,139 (20,093)
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss):
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Interest rate-related instruments designated as cash flow hedging instruments
Amount of (loss) income recognized in OCI on cash flow hedge derivatives(a)
$(6,506)$1,264 $(14,418)$8,532 
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income(a)
(597)1,437 (1,343)2,555 
(a) The entirety of gains (losses) recognized in OCI as well as those reclassified from accumulated other comprehensive income (loss) into interest income were included components in the assessment of hedge effectiveness.
Gain (loss) on derivative instruments not designated as hedging instruments
The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income:
Consolidated Statements of Income Category of Gain / (Loss) 
Recognized in Income		Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Derivative instruments
Interest rate-related and other instruments — customer and mirror, netCapital markets, net$(1)$(42)$(31)$(90)
Interest rate-related instruments — MSRs hedgeMortgage banking, net(420)(308)(219)1,158 
Foreign currency exchange forwardsCapital markets, net202 (1,075)642 (575)
Interest rate lock commitments (mortgage)Mortgage banking, net595 933 617 1,594 
Forward commitments (mortgage)Mortgage banking, net(1,339)(779)46 (1,616)
v3.26.1
Balance Sheet Offsetting (Tables)
 6 Months Ended
Jun. 30, 2026
Offsetting [Abstract]  
Offsetting Assets [Table Text Block]
The following tables present the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from these tables:
Gross Amounts RecognizedGross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance SheetsNet Amounts Presented on the Consolidated Balance SheetsGross Amounts Not Offset on the Consolidated Balance Sheets
 (in thousands)Derivative
Liabilities Offset		Cash Collateral ReceivedSecurity Collateral ReceivedNet
Amount
Derivative assets
June 30, 2026$48,451 $(9,343)$(17,769)$21,339 $(17,912)$3,427 
December 31, 202542,468 (12,839)(10,343)19,286 (18,131)1,155 
Gross Amounts RecognizedGross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance SheetsNet Amounts Presented on the Consolidated Balance SheetsGross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)Derivative
Assets Offset		Cash Collateral PledgedSecurity Collateral PledgedNet
 Amount
Derivative liabilities
June 30, 2026$15,109 $(9,343)$(720)$5,046 $— $5,046 
December 31, 202523,006 (12,839)(8,334)1,833 — 1,833 
Offsetting Liabilities [Table Text Block]
The following tables present the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from these tables:
Gross Amounts RecognizedGross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance SheetsNet Amounts Presented on the Consolidated Balance SheetsGross Amounts Not Offset on the Consolidated Balance Sheets
 (in thousands)Derivative
Liabilities Offset		Cash Collateral ReceivedSecurity Collateral ReceivedNet
Amount
Derivative assets
June 30, 2026$48,451 $(9,343)$(17,769)$21,339 $(17,912)$3,427 
December 31, 202542,468 (12,839)(10,343)19,286 (18,131)1,155 
Gross Amounts RecognizedGross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance SheetsNet Amounts Presented on the Consolidated Balance SheetsGross Amounts Not Offset on the Consolidated Balance Sheets
(in thousands)Derivative
Assets Offset		Cash Collateral PledgedSecurity Collateral PledgedNet
 Amount
Derivative liabilities
June 30, 2026$15,109 $(9,343)$(720)$5,046 $— $5,046 
December 31, 202523,006 (12,839)(8,334)1,833 — 1,833 
v3.26.1
Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Tables)
 6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]  
Summary of lending-related and other commitments The following is a summary of lending-related commitments:
(in thousands)Jun 30, 2026Dec 31, 2025
Commitments to extend credit(a), excluding commitments to originate residential mortgage loans held for sale(b)
$13,006,388 $11,872,816 
Commercial letters of credit(a)
589 425 
Standby letters of credit(c)
252,770 222,047 
(a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at June 30, 2026 or December 31, 2025.
(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10.
(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2.4 million at June 30, 2026 and $2.2 million at December 31, 2025, as an estimate of the fair value of these financial instruments.
Schedule Of Unfunded Commitments [Table Text Block]
The following table presents a summary of the changes in the allowance for unfunded commitments:
(in thousands)Six Months Ended Jun 30, 2026Year Ended Dec 31, 2025
Allowance for unfunded commitments
Balance at beginning of period$41,276 $38,776 
Initial allowance for PCD unfunded commitments3,597 — 
Initial allowance for purchased seasoned unfunded commitments1,871 — 
Provision for unfunded commitments4,000 2,500 
Balance at end of period$50,744 $41,276 
Schedule of income tax credits from qualified affordable housing projects The following table summarizes income tax credits, other income tax benefits, and investment amortization generated from the Corporation's investments in these projects, which are recognized as a component within income tax expense on the consolidated statements of income and included in the change in net income tax position and amortization of tax credit investments on the consolidated statements of cash flows:
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
Income tax credits and other income tax benefits recognized$10,406 $10,772 $19,543 $20,230 
Amortization expense8,692 8,369 17,146 17,058 
v3.26.1
Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
The tables below present the Corporation’s financial instruments measured at fair value on a recurring basis and carrying amounts and estimated fair values of certain financial instruments, aggregated by the level in the fair value hierarchy within which those measurements fall:
Jun 30, 2026
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Assets
Cash and due from banks$548,057 $548,057 $548,057 $— $— 
Interest-bearing deposits in other financial institutions1,268,379 1,268,379 1,268,379 — — 
Federal funds sold and securities purchased under agreements to resell14,355 14,355 14,355 — — 
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)7,240 7,240 — 7,240 — 
Residential mortgage-related securities:
FNMA / FHLMC137,288 137,288 — 137,288 — 
GNMA5,491,648 5,491,648 — 5,491,648 — 
Commercial mortgage-related securities:
FNMA / FHLMC410,221 410,221 — 410,221 — 
GNMA106,844 106,844 — 106,844 — 
Asset backed securities:
FFELP88,212 88,212 — 88,212 — 
SBA120,070 120,070 — 120,070 — 
Other debt securities(b)
5,063 5,063 — 3,000 2,063 
Total AFS investment securities6,366,586 6,366,586 — 6,364,523 2,063 
HTM investment securities:
U.S. Treasury securities997 1,002 1,002 — — 
Obligations of state and political subdivisions (municipal securities)1,591,681 1,468,604 — 1,468,604 — 
Residential mortgage-related securities:
FNMA / FHLMC790,729 660,737 — 660,737 — 
GNMA37,215 34,626 — 34,626 — 
Private-label292,007 246,460 — 246,460 — 
Commercial mortgage-related securities:
FNMA / FHLMC757,723 644,300 — 644,300 — 
GNMA40,423 36,089 — 36,089 — 
Total HTM investment securities3,510,775 3,091,818 1,002 3,090,816 — 
Equity securities:
Equity securities14,960 14,960 14,960 — — 
Equity securities at NAV15,000 15,000 
Total equity securities29,960 29,960 
Regulatory stocks329,436 329,436 — 329,436 — 
Residential loans held for sale94,490 94,490 — 94,490 — 
Commercial loans held for sale15,000 15,000 — 15,000 — 
Loans, net35,976,291 35,021,793 — — 35,021,793 
Bank and corporate owned life insurance717,116 717,116 — 717,116 — 
Mortgage servicing rights, net87,683 87,683 — — 87,683 
Interest rate-related instruments designated as hedging instruments(a)
1,435 1,435 — 1,435 — 
Foreign currency exchange forwards designated as hedging instruments(a)
1,355 1,355 — 1,355 — 
Interest rate-related and other instruments not designated as hedging instruments(a)
61,693 61,693 — 61,693 — 
Foreign currency exchange forwards not designated as hedging instruments(a)
440 440 — 440 — 
Interest rate lock commitments to originate residential mortgage loans held for sale1,432 1,432 — — 1,432 
Total selected assets at fair value$49,024,483 $47,651,028 $1,846,753 $10,676,304 $35,112,971 
(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
(b) The quantifiable unobservable input for fair value measurement of the Level 3 classified security is externally developed.
Jun 30, 2026
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Liabilities
Deposits:
Brokered CDs$3,933,787 $3,923,505 $— $3,923,505 $— 
Other time deposits4,782,343 4,771,175 — 4,771,175 — 
Federal funds purchased and securities sold under agreements to repurchase529,276 529,276 529,276 — — 
FHLB advances4,574,681 4,568,111 — 4,568,111 — 
Senior and subordinated debt591,080 589,506 — 589,506 — 
Standby letters of credit(a)
2,365 2,365 — 2,365 — 
Interest rate-related instruments designated as hedging instruments(b)
6,737 6,737 — 6,737 — 
Foreign currency exchange forwards designated as hedging instruments(b)
303 303 — 303 — 
Interest rate-related and other instruments not designated as hedging instruments(b)
111,446 111,446 — 111,446 — 
Foreign currency exchange forwards not designated as hedging instruments(b)
198 198 — 198 — 
Forward commitments to sell residential mortgage loans397 397 — — 397 
Total selected liabilities at fair value$14,532,613 $14,503,019 $529,276 $13,973,346 $397 

(a) The commitment on standby letters of credit was $252.8 million at June 30, 2026. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.
(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
Dec 31, 2025
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Assets
Cash and due from banks$574,698 $574,698 $574,698 $— $— 
Interest-bearing deposits in other financial institutions1,144,123 1,144,123 1,144,123 — — 
Federal funds sold and securities purchased under agreements to resell1,400 1,400 1,400 — — 
AFS investment securities:
Obligations of state and political subdivisions (municipal securities)3,044 3,044 — 3,044 — 
Residential mortgage-related securities:
FNMA / FHLMC129,863 129,863 — 129,863 — 
GNMA5,039,829 5,039,829 — 5,039,829 — 
Commercial mortgage-related securities:
FNMA / FHLMC16,958 16,958 — 16,958 — 
GNMA109,556 109,556 — 109,556 — 
Asset backed securities:
FFELP95,046 95,046 — 95,046 — 
SBA269 269 — 269 — 
Other debt securities2,998 2,998 — 2,998 — 
Total AFS investment securities5,397,563 5,397,563 — 5,397,563 — 
HTM investment securities:
U.S. Treasury securities996 1,015 1,015 — — 
Obligations of state and political subdivisions (municipal securities)1,628,088 1,507,302 — 1,507,302 — 
Residential mortgage-related securities:
FNMA / FHLMC823,630 696,462 — 696,462 — 
GNMA39,123 36,884 — 36,884 — 
Private-label302,817 258,827 — 258,827 — 
Commercial mortgage-related securities:
FNMA / FHLMC763,370 650,366 — 650,366 — 
GNMA44,552 40,138 — 40,138 — 
Total HTM investment securities3,602,576 3,190,994 1,015 3,189,979 — 
Equity securities:
Equity securities11,060 11,060 11,060 — — 
Equity securities at NAV15,000 15,000 
Total equity securities26,060 26,060 
Regulatory stocks252,514 252,514 — 252,514 — 
Residential loans held for sale72,499 72,499 — 72,499 — 
Loans, net30,766,886 29,970,788 — — 29,970,788 
Bank and corporate owned life insurance694,452 694,452 — 694,452 — 
Mortgage servicing rights, net86,337 86,337 — — 86,337 
Interest rate-related instruments designated as hedging instruments(a)
10,517 10,517 — 10,517 — 
Foreign currency exchange forwards designated as hedging instruments(a)
757 757 — 757 — 
Interest rate-related and other instruments not designated as hedging instruments(a)
66,787 66,787 — 66,787 — 
Foreign currency exchange forwards not designated as hedging instruments(a)
1,731 1,731 — 1,731 — 
Interest rate lock commitments to originate residential mortgage loans held for sale814 814 — — 814 
Total selected assets at fair value$42,699,714 $41,492,034 $1,732,296 $9,686,799 $30,057,939 
(a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
Dec 31, 2025
(in thousands)Carrying AmountFair ValueLevel 1Level 2Level 3
Liabilities
Deposits:
Brokered CDs$3,795,133 $3,791,245 $— $3,791,245 $— 
Other time deposits4,041,178 4,035,549 — 4,035,549 — 
Federal funds purchased and securities sold under agreements to repurchase307,864 307,864 307,864 — — 
FHLB advances3,268,094 3,267,836 — 3,267,836 — 
Senior and subordinated debt594,276 598,141 — 598,141 — 
Standby letters of credit(a)
2,225 2,225 — 2,225 — 
Interest rate-related instruments designated as hedging instruments(b)
1 1 — 1 — 
Foreign currency exchange forwards designated as hedging instruments(b)
194 194 — 194 — 
Interest rate-related and other instruments not designated as hedging instruments(b)
108,631 108,631 — 108,631 — 
Foreign currency exchange forwards not designated as hedging instruments(b)
1,517 1,517 — 1,517 — 
Forward commitments to sell residential mortgage loans444 444 — — 444 
Total selected liabilities at fair value$12,119,557 $12,113,647 $307,864 $11,805,339 $444 
(a) The commitment on standby letters of credit was $222.0 million at December 31, 2025. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.
(b) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The table below presents a rollforward of the consolidated balance sheets amounts for the Corporation's mortgage derivatives measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy:
(in thousands)Interest rate lock commitments to originate residential mortgage loans held for saleForward commitments to sell residential mortgage loans
Balance December 31, 2024$327 $(254)
New production13,435 (3,998)
Closed loans / settlements(13,690)2,738 
Other742 1,958 
Change in mortgage derivative487 698 
Balance December 31, 2025814 444 
New production7,629 (2,240)
Closed loans / settlements(6,308)2,910 
Other(703)(717)
Change in mortgage derivative618 (47)
Balance June 30, 2026$1,432 $397 
Equity Securities without Readily Determinable Fair Value [Table Text Block]
The following table presents a rollforward of the fair value of Level 3 equity securities that are measured under the measurement alternative, and the related adjustments recorded during the periods presented for those securities with observable price changes:
 (in thousands)
Fair value as of December 31, 2024$72 
Purchases14 
Sales(23)
Transfers out of level 3(63)
Fair value as of December 31, 2025$— 
The Corporation did not have any activity for Level 3 equity securities for the six months ended June 30, 2026.
Fair Value Measurements, Nonrecurring [Table Text Block]
The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall:
Fair Value
(in thousands)Fair Value HierarchyJune 30, 2026December 31, 2025
Assets
Individually evaluated loansLevel 3$48,296 $18,659 
OREO(a)
Level 21,397 770 
(a) These assets are held at lower of its carrying amount or fair value less cost to sell. Assets included here are those that were adjusted to fair value less cost to sell during the period.
Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table Text Block]
The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements:
June 30, 2026Valuation TechniqueSignificant Unobservable InputRange of InputsWeighted Average Input Applied
Mortgage servicing rightsDiscounted cash flowOption adjusted spread5%-8%5%
Mortgage servicing rightsDiscounted cash flowConstant prepayment rate—%-100%8%
Individually evaluated loansDiscounted cash flowDiscount factor45%-45%45%
Individually evaluated loansMarket approachAppraisal / Cost to sell44%-80%53%
Interest rate lock commitments to originate residential mortgage loans held for saleDiscounted cash flowClosing ratio70%-100%92%
v3.26.1
Retirement Plans (Tables)
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
The components of net periodic pension benefit and net periodic cost for the RAP and Postretirement Plan were as follows:
Three Months Ended Jun 30,Six Months Ended Jun 30,
(in thousands)2026202520262025
RAP
Service cost$869 $810 $1,737 $1,619 
Interest cost2,749 2,814 5,499 5,628 
Expected return on plan assets(9,772)(9,809)(19,544)(19,619)
Amortization of prior service credit(44)(44)(89)(89)
Total net periodic pension benefit$(6,198)$(6,230)$(12,397)$(12,460)
Postretirement Plan
Interest cost$22 $26 $43 $53 
Amortization of prior service credit(19)(19)(38)(38)
Amortization of actuarial loss— 4 — 8 
Total net periodic cost$3 $12 $6 $23 
v3.26.1
Segment Reporting (Tables)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Segment Reporting [Abstract]    
Selected segment information
Financial information about the Corporation’s segments is presented below:
Three Months Ended June 30, 2026
(in thousands)Corporate and Commercial SpecialtyCommunity, Consumer and BusinessRisk Management and Shared ServicesConsolidated Corporation
Net segment interest income$267,324 $86,481 $16,234 $370,039 
Net intersegment interest (expense) income(105,641)136,046 (30,405)— 
Net interest income (expense)161,683 222,527 (14,171)370,039 
Noninterest income15,648 56,437 8,313 80,398 
Total income (expense) before provision177,331 278,964 (5,858)450,437 
Provision for credit losses21,287 6,456 (8,355)19,388 
Total income after provision156,044 272,508 2,497 431,049 
Noninterest expense
Personnel24,595 65,456 71,117 161,168 
Technology(a)
1,293 13,853 17,721 32,867 
Occupancy(a)
255 8,405 5,431 14,091 
Business development and advertising1,128 839 6,581 8,548 
Equipment(a)
6 2,319 3,098 5,423 
Legal and professional 272 1,478 15,704 17,454 
Loan and foreclosure costs233 1,296 23 1,552 
FDIC assessment— — 10,595 10,595 
Other intangible amortization— — 6,894 6,894 
Other noninterest expense1,087 10,376 1,827 13,290 
Allocated indirect expense (income)29,531 70,523 (100,054)— 
Total noninterest expense58,400 174,545 38,937 271,882 
Net income (loss) before income taxes97,644 97,963 (36,440)159,167 
Income tax expense17,567 20,676 (2,640)35,603 
Net income (loss)$80,077 $77,287 $(33,800)$123,564 
Loans$21,736,674 $14,231,238 $499,128 $36,467,040 
Allocated goodwill556,343 590,738 — 1,147,081 
Total assets22,552,085 15,452,018 13,808,403 51,812,506 
(a) A portion of total depreciation expense of $0.2 million, $6.3 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.
Three Months Ended June 30, 2025
(in thousands)Corporate and Commercial SpecialtyCommunity, Consumer and BusinessRisk Management and Shared ServicesConsolidated Corporation
Net segment interest income (expense)$242,978 $68,871 $(11,849)$300,000 
Net intersegment interest (expense) income(107,337)143,478 (36,141)— 
Net interest income (expense)135,641 212,349 (47,990)300,000 
Noninterest income11,984 51,481 3,512 66,977 
Total income (expense) before provision147,625 263,830 (44,478)366,977 
Provision for credit losses20,369 6,363 (8,736)17,996 
Total income (expense) after provision127,256 257,467 (35,742)348,981 
Noninterest expense
Personnel20,149 56,641 50,204 126,994 
Technology(a)
842 12,903 12,763 26,508 
Occupancy(a)
190 7,386 5,068 12,644 
Business development and advertising1,252 968 5,528 7,748 
Equipment(a)
6 2,301 2,187 4,494 
Legal and professional221 529 5,924 6,674 
Loan and foreclosure costs261 1,171 1,273 2,705 
FDIC assessment— — 9,708 9,708 
Other intangible amortization— — 2,203 2,203 
Other noninterest expense934 8,024 716 9,674 
Allocated indirect expense (income)32,166 63,408 (95,574)— 
Total noninterest expense56,021 153,331 — 209,352 
Net income (loss) before income taxes71,236 104,137 (35,744)139,629 
Income tax expense (benefit)13,211 21,869 (6,681)28,399 
Net income (loss)$58,025 $82,268 $(29,063)$111,230 
Loans$17,617,892 $12,531,178 $458,535 $30,607,605 
Allocated goodwill525,836 579,156 — 1,104,992 
Total assets17,907,721 13,043,969 13,042,039 43,993,729 
a) A portion of total depreciation expense of $0.1 million, $5.9 million, and $6.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.
Six Months Ended Jun 30, 2026
(in thousands)Corporate and Commercial SpecialtyCommunity, Consumer and BusinessRisk Management and Shared ServicesConsolidated Corporation
Net segment interest income$498,429 $154,917 $23,882 $677,228 
Net intersegment interest (expense) income(208,353)266,076 (57,723)— 
Net interest income (expense)290,076 420,993 (33,841)677,228 
Noninterest income29,540 112,380 14,336 156,256 
Total income (expense) before provision319,616 533,373 (19,505)833,484 
Provision for credit losses41,947 13,391 (24,949)30,389 
Total income after provision277,669 519,982 5,444 803,095 
Noninterest expense
Personnel48,145 130,410 117,786 296,341 
Technology(a)
2,116 27,978 32,509 62,603 
Occupancy(a)
473 16,756 10,588 27,817 
Business development and advertising2,097 1,527 12,750 16,374 
Equipment(a)
12 4,395 6,626 11,033 
Legal and professional 529 2,160 21,487 24,176 
Loan and foreclosure costs721 2,236 302 3,259 
FDIC assessment— — 19,432 19,432 
Other intangible amortization— — 9,096 9,096 
Other noninterest expense1,808 18,058 1,048 20,914 
Allocated indirect expense (income)52,230 127,110 (179,340)— 
Total noninterest expense108,131 330,630 52,284 491,045 
Net income (loss) before income taxes169,538 189,352 (46,840)312,050 
Income tax expense (benefit)30,825 39,868 (1,843)68,850 
Net income (loss)$138,713 $149,484 $(44,997)$243,200 
(a) A portion of total depreciation expense of $0.3 million, $12.5 million, and $11.9 million for the Corporate and Commercial Specialty, Community Consumer and Business, and Risk Management and Shared Services segments, respectively, is included in this expense caption.
Six Months Ended Jun 30, 2025
(in thousands)Corporate and Commercial SpecialtyCommunity, Consumer and BusinessRisk Management and Shared ServicesConsolidated Corporation
Net segment interest income (expense)$470,263 $131,367 $(15,690)$585,940 
Net intersegment interest (expense) income(203,557)288,856 (85,299)— 
Net interest income (expense)266,706 420,223 (100,989)585,940 
Noninterest income24,887 100,560 307 125,754 
Total income (expense) before provision291,593 520,783 (100,682)711,694 
Provision for credit losses39,382 12,434 (20,817)30,999 
Total income (expense) after provision252,211 508,349 (79,865)680,695 
Noninterest expense
Personnel41,475 116,513 92,902 250,890 
Technology(a)
1,432 25,947 26,267 53,646 
Occupancy(a)
336 15,820 11,869 28,025 
Business development and advertising2,186 1,805 10,143 14,134 
Equipment(a)
12 4,331 4,678 9,021 
Legal and professional422 1,343 10,992 12,757 
Loan and foreclosure costs1,071 2,516 1,712 5,299 
FDIC assessment— — 20,144 20,144 
Other intangible amortization— — 4,405 4,405 
Other noninterest expense1,714 15,427 4,507 21,648 
Allocated indirect expense (income)63,505 124,114 (187,619)— 
Total noninterest expense112,155 307,816 — 419,971 
Net income (loss) before income taxes140,056 200,533 (79,865)260,724 
Income tax expense (benefit)25,997 42,112 (20,301)47,808 
Net income (loss)$114,059 $158,421 $(59,564)$212,916 
(a) A portion of total depreciation expense of $0.1 million, $11.8 million, and $14.0 million for the Corporate and Commercial Specialty, Community Consumer and Business, and
Risk Management and Shared Services segments, respectively, is included in this expense caption.

Expenses included within the other noninterest expense line of the segment information above relate to the remaining segment expenses including office expense and card issuance costs. None of the individual expense categories rise to the level of significance for the segment; however, they are utilized in determining the profit or loss measure for each segment.
The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to U.S. GAAP. As a result, reportable segments and the financial information of the reported segments are not necessarily comparable with similar information reported by other financial institutions. Furthermore, the information presented is not indicative of how the segments would perform if they operated as independent entities.
The chief operating decision maker for each of the segments is the President and Chief Executive Officer of the Corporation. For the Corporate and Commercial Specialty and Community, Consumer and Business segments, the chief operating decision maker utilizes net interest income, net income and average total loans and deposits in allocating resources for each segment predominantly in the annual budget and forecasting process. The chief operating decision maker considers budget-to-actual variances on a monthly basis for both profit measures when making decisions about allocating capital and personnel to the segments. Based on the reviews of these two segments and other company-wide initiatives, the chief operating decision maker is informed about allocation of resources to the Risk Management and Shared Services segment.
v3.26.1
Accumulated Other Comprehensive Income (Loss) (Tables)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]    
Summary of activity in accumulated other comprehensive income (loss)
(in thousands)AFS Investment
Securities		Cash Flow Hedge DerivativesDefined Benefit
Pension and
Postretirement
Obligations		Accumulated
Other
Comprehensive
(Loss) Income
Balance March 31, 2026
$(28,608)$2,153 $(18,050)$(44,505)
Other comprehensive loss before reclassifications(36,846)— — (36,846)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities
1,901 — — 1,901 
Other assets / accrued expenses and other liabilities— (6,506)— (6,506)
Interest income— (597)— (597)
Personnel expense— — (63)(63)
Income tax benefit (expense)8,717 (1,709)15 7,023 
Net other comprehensive loss during period(26,228)(8,812)(48)(35,088)
Balance June 30, 2026$(54,836)$(6,659)$(18,098)$(79,593)
Balance March 31, 2025$(23,655)$9,135 $(20,624)$(35,144)
Other comprehensive income before reclassifications21,317 — — 21,317 
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities
2,059 — — 2,059 
Other assets / accrued expenses and other liabilities— 1,264 — 1,264 
Interest income— 1,437 — 1,437 
Personnel expense— — (63)(63)
Other expense— — (4)(4)
Income tax (expense) benefit(5,830)650 17 (5,164)
Net other comprehensive income (loss) during period17,545 3,352 (50)20,847 
Balance June 30, 2025$(6,109)$12,487 $(20,674)$(14,297)
The following table summarizes the components of accumulated other comprehensive income (loss) at June 30, 2026 and 2025, including changes during the preceding six and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):
(in thousands)Investment
Securities		Cash Flow Hedge DerivativesDefined Benefit
Pension and
Postretirement
Obligations		Accumulated
Other
Comprehensive
Income (Loss)
Balance December 31, 2025
$(2,456)$12,894 $(18,003)$(7,566)
Other comprehensive loss before reclassifications(73,377)— — (73,377)
Amounts reclassified from accumulated other comprehensive (loss) income:
Amortization of net unrealized losses on AFS securities transferred to HTM securities
3,590 — — 3,590 
Other assets / accrued expenses and other liabilities— (14,418)— (14,418)
Interest expense— (1,343)— (1,343)
Personnel expense— — (126)(126)
Income tax benefit (expense)17,407 (3,792)31 13,647 
Net other comprehensive loss during period(52,380)(19,553)(95)(72,027)
Balance June 30, 2026$(54,836)$(6,659)$(18,098)$(79,593)
Balance December 31, 2024
$(48,993)$(1,268)$(24,154)$(74,416)
Other comprehensive income before reclassifications53,149 — 4,770 57,919 
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of net unrealized losses on AFS securities transferred to HTM securities
3,986 — — 3,986 
Other assets / accrued expenses and other liabilities— 8,532 — 8,532 
Interest income— 2,555 — 2,555 
Personnel expense— — (126)(126)
Other expense— — (8)(8)
Income tax (expense) benefit(14,251)2,668 (1,157)(12,740)
Net other comprehensive income during period42,884 13,755 3,480 60,119 
Balance June 30, 2025$(6,109)$12,487 $(20,674)$(14,297)
v3.26.1
Business Combinations - Consideration and Narrative (Details) - American National [Member]
$ / shares in Units, $ in Thousands
Apr. 01, 2026
USD ($)
$ / shares
shares
Business Combination, Consideration Transferred, Equity Interest [Line Items]  
Effective Date of Acquisition Apr. 01, 2026
Business Combination, Name of Acquiree American National
Business Combination, Control Obtained, Description Pursuant to the Merger Agreement, (i) American National merged with and into Associated Banc-Corp, with Associated Banc-Corp continuing as the surviving corporation, and (ii) immediately following such merger, American National Bank, a national banking association and wholly owned subsidiary of American National, merged with and into the Bank, with the Bank continuing as the surviving bank.
Business Combination, Voting Equity Interest Acquired, Percentage 100.00%
Business Combination, Description of Acquiree American National operated 33 branches across Nebraska, Minnesota and Iowa, with a concentration in the Greater Omaha and Minneapolis / St. Paul metro markets.
Business Combination, Reason for Business Combination As a result of the acquisition, the Corporation increased its deposit market share and will deliver its products and services to an expanded client base across attractive Midwest markets.
Business Combination, Consideration Transferred, Equity Interest | $ $ 594,100
Business Combination, Price Per Share | $ / shares $ 25.86
Business Acquisition Equity Consideration Per Share Conversion Ratio 36.250
Stock Issued During Period, Shares, Acquisitions 22,975,382
v3.26.1
Business Combinations - Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
Apr. 01, 2026
Jun. 30, 2026
Dec. 31, 2025
Business Combination [Line Items]      
Goodwill $ 42,100 $ 1,147,081 $ 1,104,992
American National [Member]      
Business Combination [Line Items]      
Business Combination, Consideration Transferred 594,144    
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent 220,898    
Business Combination, Recognized Asset Acquired, Investment in Debt and Equity Securities, Current 989,925    
Business Combination, Recognized Asset Acquired, Receivable, Current 3,716,472    
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Indefinite-Lived 103,200    
Business Combination, Recognized Asset Acquired, Other Asset, Current 155,960    
Business Combination, Recognized Asset Acquired, Asset, Current 5,186,455    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deposits 4,544,700    
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent 89,700    
Business Combination, Recognized Liability Assumed, Liability 4,634,400    
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) 552,055    
Goodwill $ 42,089    
v3.26.1
Business Combinations - Schedules of Financing receivables Purchased Seasoned Loans (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Apr. 01, 2026
Dec. 31, 2025
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]      
Financing Receivable, before Allowance for Credit Loss $ 36,467,040   $ 31,163,614
American National [Member]      
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]      
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process   $ 3,801,050  
Financing Receivable, Unamortized Purchase Premium (Discount)   (16,803)  
Financing Receivable, before Allowance for Credit Loss   3,784,247  
Financing Receivable, Allowance for Credit Loss   (67,775)  
Financing Receivable, after Allowance for Credit Loss   3,716,472  
American National [Member] | Financial Asset Acquired with Credit Deterioration [Member]      
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]      
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process   615,403  
Financing Receivable, Unamortized Purchase Premium (Discount)   (19,495)  
Financing Receivable, before Allowance for Credit Loss   595,908  
Financing Receivable, Allowance for Credit Loss   (39,512)  
Financing Receivable, after Allowance for Credit Loss   556,396  
American National [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member]      
Schedule of Financing Receivables Purchased Seasoned Loans [Line Items]      
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process   3,185,647  
Financing Receivable, Unamortized Purchase Premium (Discount)   2,692  
Financing Receivable, before Allowance for Credit Loss   3,188,339  
Financing Receivable, Allowance for Credit Loss   (28,263)  
Financing Receivable, after Allowance for Credit Loss   $ 3,160,076  
v3.26.1
Business Combinations - Transaction Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Business Combination, Separately Recognized Transaction [Line Items]        
Labor and Related Expense $ 161,168 $ 126,994 $ 296,341 $ 250,890
Information Technology and Data Processing 32,867 26,508 62,603 53,646
Occupancy, Net 14,091 12,644 27,817 28,025
Marketing and Advertising Expense 8,548 7,748 16,374 14,134
Equipment Expense 5,423 4,494 11,033 9,021
Professional Fees 17,454 6,674 24,176 12,757
Other Noninterest Expense 13,290 $ 9,674 20,914 $ 21,648
American National [Member]        
Business Combination, Separately Recognized Transaction [Line Items]        
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed     25,500  
American National [Member] | Other Expense [Member]        
Business Combination, Separately Recognized Transaction [Line Items]        
Labor and Related Expense 13,364   13,364  
Information Technology and Data Processing 781   781  
Occupancy, Net 23   103  
Marketing and Advertising Expense 417   654  
Equipment Expense 98   98  
Professional Fees 9,569   10,253  
Other Noninterest Expense 217   223  
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed $ 24,469   $ 25,476  
v3.26.1
Business Combinations - Pro Forma (Details) - American National [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Business Combination, Pro Forma Information [Line Items]        
Business Combination, Pro Forma Information, Pro Forma Revenue $ 447,151 $ 415,810 $ 881,852 $ 807,328
Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax $ 141,691 $ 120,532 263,217 $ 212,961
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed     $ 25,500  
v3.26.1
Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share [Abstract]            
Net Income (Loss) Attributable to Parent $ 123,564 $ 119,635 $ 111,230 $ 101,687 $ 243,200 $ 212,916
Preferred Stock Dividends and Other Adjustments (2,875)   (2,875)   (5,750) (5,750)
Net Income (Loss) Available to Common Stockholders, Basic 120,689   108,355   237,450 207,166
Dividends, Common Stock (45,634)   (38,304)   (85,577) (76,636)
Unvested Share based Payment Awards (107)   (194)   (223) (399)
Undistributed Earnings (Loss) Available to Common Shareholders, Basic 74,769   69,501   151,203 129,500
Undistributed Earnings Allocated To Unvested Share Based Payment Awards 179   356   447 630
Undistributed Earnings, Basic, Total 74,948   69,857   151,650 130,131
Earnings Per Share, Basic [Abstract]            
Distributed Earnings 45,634   38,304   85,577 76,636
Undistributed Earnings (Loss) Available to Common Shareholders, Basic 74,769   69,501   151,203 129,500
Common Shareholders Earnings Basic 120,403   107,805   236,780 206,137
Earnings Per Share, Diluted [Abstract]            
Distributed Earnings To Common Shareholders Diluted 45,634   38,304   85,577 76,636
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted 74,769   69,501   151,203 129,500
Common Shareholders Earnings Diluted $ 120,403   $ 107,805   $ 236,780 $ 206,137
Weighted Average Number of Shares Outstanding, Basic 188,084   164,936   176,654 165,081
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements 1,815   1,407   1,748 1,425
Weighted Average Number of Shares Outstanding, Diluted, Total 189,899   166,343   178,402 166,506
Earnings Per Share, Basic $ 0.64   $ 0.65   $ 1.34 $ 1.25
Earnings Per Share, Diluted $ 0.63   $ 0.65   $ 1.33 $ 1.24
v3.26.1
Earnings Per Common Share (Details Textuals) - shares
shares in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Share-Based Payment Arrangement, Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1.4 1.2
v3.26.1
Stock-Based Compensation, Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Beginning Balance 1,460  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period 444  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance 1,016 1,460
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number 1,016  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning Balance $ 22.71  
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price 23.78  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance 22.24 $ 22.71
Options Exercisable, Weighted Average Exercise Price (in usd per share) $ 22.24  
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 2 years 5 months 4 days 2 years 6 months 7 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 2 years 5 months 4 days 2 years 6 months 7 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 2 years 5 months 4 days  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value, Beginning Balance $ 4,483  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value, Ending Balance 8,658 $ 4,483
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value $ 8,658  
v3.26.1
Stock-Based Compensation, Restricted Stock Activity (Details)
shares in Thousands
 6 Months Ended
Jun. 30, 2026
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance | shares 2,372
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | shares 897
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period | shares 849
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares 47
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance | shares 2,373
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares $ 22.02
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares 26.49
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $ / shares 22.01
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $ / shares 24.42
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Ending Balance | $ / shares $ 23.66
v3.26.1
Stock-Based Compensation (Details Textuals) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value $ 2.3 $ 0.4
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 0.00%  
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 150.00%  
Performance-based Restricted Stock Award    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 3 years 3 years
Service-based Restricted Stock Award    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 4 years 4 years
Restricted Stock Award    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-Based Payment Arrangement, Accelerated Cost $ 4.2 $ 4.4
Share-Based Payment Arrangement, Expense 11.2 $ 11.3
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 28.1  
Remaining requisite service periods, extend through first quarter of 2030  
v3.26.1
Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost $ 6,411,899 $ 5,367,813
Debt Securities, Available-for-Sale 6,366,586 5,397,563
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (49,001) (11,551)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 3,688 41,301
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 3,510,775 3,602,576
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 1,859 3,488
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss (420,816) (415,070)
Debt Securities, Held-to-Maturity, Fair Value 3,091,818 3,190,994
Equity securities 15,000 15,000
US Treasury Securities    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 997 996
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 5 19
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-Maturity, Fair Value 1,002 1,015
US Treasury Securities | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 997 996
Debt Securities, Held-to-Maturity, Fair Value 1,002 1,015
US Treasury Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Fair Value 0 0
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 7,342 3,063
Debt Securities, Available-for-Sale 7,240 3,044
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (106) (20)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 4 1
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 1,591,681 1,628,088
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 1,797 3,070
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss (124,874) (123,856)
Debt Securities, Held-to-Maturity, Fair Value 1,468,604 1,507,302
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 7,240 3,044
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 1,591,681 1,628,088
Debt Securities, Held-to-Maturity, Fair Value 1,468,604 1,507,302
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 7,240 3,044
Debt Securities, Held-to-Maturity, Fair Value 1,468,604 1,507,302
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 0  
Debt Securities, Available-for-Sale 0  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 292,007 302,817
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss (45,547) (43,990)
Debt Securities, Held-to-Maturity, Fair Value 246,460 258,827
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 89,197 95,977
Debt Securities, Available-for-Sale 88,212 95,046
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (986) (950)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 1 19
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 0  
Debt Securities, Held-to-Maturity, Fair Value 0  
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 88,212 95,046
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 88,212 95,046
US Government-sponsored Enterprises Debt Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 120,221 283
Debt Securities, Available-for-Sale 120,070 269
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (538) (14)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 387 0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 0  
Debt Securities, Held-to-Maturity, Fair Value 0  
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 120,070 269
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 120,070 269
Other Debt securities    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 6,750 3,000
Debt Securities, Available-for-Sale 5,063 2,998
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (1,687) (2)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 0 0
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 142,709 134,142
Debt Securities, Available-for-Sale 137,288 129,863
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (6,236) (5,493)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 815 1,214
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 790,729 823,630
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 39 165
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss (130,031) (127,333)
Debt Securities, Held-to-Maturity, Fair Value 660,737 696,462
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 137,288 129,863
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 790,729 823,630
Debt Securities, Held-to-Maturity, Fair Value 660,737 696,462
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 137,288 129,863
Debt Securities, Held-to-Maturity, Fair Value 660,737 696,462
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 414,880 17,959
Debt Securities, Available-for-Sale 410,221 16,958
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (4,659) (1,001)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 757,723 763,370
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss (113,423) (113,004)
Debt Securities, Held-to-Maturity, Fair Value 644,300 650,366
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 410,221 16,958
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 757,723 763,370
Debt Securities, Held-to-Maturity, Fair Value 644,300 650,366
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 410,221 16,958
Debt Securities, Held-to-Maturity, Fair Value 644,300 650,366
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 5,518,890 5,000,015
Debt Securities, Available-for-Sale 5,491,648 5,039,829
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (29,723) (253)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 2,481 40,067
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 37,215 39,123
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 18 82
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss (2,607) (2,321)
Debt Securities, Held-to-Maturity, Fair Value 34,626 36,884
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 5,491,648 5,039,829
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 37,215 39,123
Debt Securities, Held-to-Maturity, Fair Value 34,626 36,884
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 5,491,648 5,039,829
Debt Securities, Held-to-Maturity, Fair Value 34,626 36,884
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 111,910 113,374
Debt Securities, Available-for-Sale 106,844 109,556
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax (5,066) (3,818)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 40,423 44,552
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain 0 152
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss (4,334) (4,566)
Debt Securities, Held-to-Maturity, Fair Value 36,089 40,138
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 106,844 109,556
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 40,423 44,552
Debt Securities, Held-to-Maturity, Fair Value 36,089 40,138
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-Sale 106,844 109,556
Debt Securities, Held-to-Maturity, Fair Value $ 36,089 $ 40,138
v3.26.1
Investment Securities, AFS and HTM Contractual Maturities (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Amortized Cost    
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One $ 3,750  
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five 7,739  
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 0  
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 2,603  
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost 14,092  
Available for Sale, Total debt securities 6,411,899 $ 5,367,813
Fair Value    
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One 2,063  
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five 7,655  
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 0  
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 2,585  
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value 12,303  
Available for Sale, Total debt securities $ 6,366,586 5,397,563
Ratio of Fair Value to Amortized Cost, AFS 99.30%  
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One $ 820,235  
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five 825  
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 8,078  
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 763,540  
Held to Maturity, Total Debt Securities 1,592,678  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 3,510,775 3,602,576
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One 818,331  
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five 779  
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 7,932  
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 642,564  
Held to Maturity, Securities, Debt Securities 1,469,606  
Debt Securities, Held-to-Maturity, Fair Value $ 3,091,818 3,190,994
Ratio of Fair Value to Amortized Cost, HTM 88.10%  
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Amortized Cost    
Available for Sale, Total debt securities $ 0  
Fair Value    
Available for Sale, Total debt securities 0  
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 292,007 302,817
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value 246,460 258,827
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]    
Amortized Cost    
Available for Sale, Total debt securities 89,197 95,977
Fair Value    
Available for Sale, Total debt securities 88,212 95,046
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 0  
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value 0  
US Government-sponsored Enterprises Debt Securities [Member]    
Amortized Cost    
Available for Sale, Total debt securities 120,221 283
Fair Value    
Available for Sale, Total debt securities 120,070 269
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 0  
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value 0  
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]    
Amortized Cost    
Available for Sale, Total debt securities 142,709 134,142
Fair Value    
Available for Sale, Total debt securities 137,288 129,863
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 790,729 823,630
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value 660,737 696,462
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]    
Amortized Cost    
Available for Sale, Total debt securities 414,880 17,959
Fair Value    
Available for Sale, Total debt securities 410,221 16,958
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 757,723 763,370
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value 644,300 650,366
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]    
Amortized Cost    
Available for Sale, Total debt securities 5,518,890 5,000,015
Fair Value    
Available for Sale, Total debt securities 5,491,648 5,039,829
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 37,215 39,123
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value 34,626 36,884
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]    
Amortized Cost    
Available for Sale, Total debt securities 111,910 113,374
Fair Value    
Available for Sale, Total debt securities 106,844 109,556
Amortized Cost    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 40,423 44,552
Fair Value    
Debt Securities, Held-to-Maturity, Fair Value $ 36,089 $ 40,138
v3.26.1
Investment Securities, HTM Credit Quality Indicators (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss $ 3,510,775 $ 3,602,576
US Treasury Securities    
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 997 996
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 1,591,681 1,628,088
Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans    
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 790,729 823,630
Residential Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 37,215 39,123
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 292,007 302,817
Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans    
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 757,723 763,370
Commercial Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss $ 40,423 $ 44,552
v3.26.1
Investment Securities Gain/Loss Sale of Securities (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Investments, Debt and Equity Securities [Abstract]        
Equity Securities, FV-NI $ 35 $ 7 $ 10 $ 11
Debt Securities, Realized Gain (Loss) 35 7 6 11
Gross losses on HTM securities $ 0 $ 0 $ (4) $ 0
v3.26.1
Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 296 32
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (36,456) $ (481)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 4,965,951 $ 193,126
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 38 47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (12,545) $ (11,070)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 221,750 242,062
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (49,001) (11,551)
Debt Securities, Available-for-sale, Unrealized Loss Position 5,187,701 435,188
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (7,599) (3,448)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 548,115 116,143
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (413,217) (411,622)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 2,180,415 2,472,681
Total unrealized losses on held to maturity securities (420,816) (415,070)
Total fair value of unrealized losses on held to maturity securities $ 2,728,530 $ 2,588,824
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 4 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (99) $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 4,176 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 1 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (7) $ (20)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 243 863
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (106) (20)
Debt Securities, Available-for-sale, Unrealized Loss Position 4,419 863
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (6,876) (2,978)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 500,662 89,826
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (117,998) (120,878)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 615,514 842,485
Total unrealized losses on held to maturity securities (124,874) (123,856)
Total fair value of unrealized losses on held to maturity securities 1,116,176 932,311
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (45,547) (43,990)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 246,460 258,827
Total unrealized losses on held to maturity securities (45,547) (43,990)
Total fair value of unrealized losses on held to maturity securities $ 246,460 $ 258,827
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 2 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (75) $ (152)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 30,893 $ 33,239
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 12 12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (911) $ (798)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 51,501 55,565
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (986) (950)
Debt Securities, Available-for-sale, Unrealized Loss Position $ 82,394 $ 88,804
US Government-sponsored Enterprises Debt Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 6 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (526) $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 89,501 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 2 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (12) $ (14)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 183 231
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (538) (14)
Debt Securities, Available-for-sale, Unrealized Loss Position $ 89,684 $ 231
Other Debt securities    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 3 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (1,687) $ (2)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 4,062 $ 1,998
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 0 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ 0 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 0 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (1,687) (2)
Debt Securities, Available-for-sale, Unrealized Loss Position $ 4,062 $ 1,998
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 34 12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (604) $ (95)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 47,975 $ 14,155
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 5 12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (5,632) $ (5,398)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 44,189 56,215
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (6,236) (5,493)
Debt Securities, Available-for-sale, Unrealized Loss Position 92,164 70,370
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (127) 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 15,968 30
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (129,904) (127,333)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 637,637 676,915
Total unrealized losses on held to maturity securities (130,031) (127,333)
Total fair value of unrealized losses on held to maturity securities $ 653,605 $ 676,945
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 11 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (3,780) $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 393,331 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 1 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (879) $ (1,001)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 16,889 16,958
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (4,659) (1,001)
Debt Securities, Available-for-sale, Unrealized Loss Position 410,220 16,958
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (536) (470)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 26,155 26,287
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (112,887) (112,534)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 618,145 624,079
Total unrealized losses on held to maturity securities (113,423) (113,004)
Total fair value of unrealized losses on held to maturity securities $ 644,300 $ 650,366
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 236 16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (29,685) $ (232)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 4,396,013 $ 143,734
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 2 3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (38) $ (21)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,901 2,674
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (29,723) (253)
Debt Securities, Available-for-sale, Unrealized Loss Position 4,397,914 146,408
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (60) 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 5,330 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (2,547) (2,321)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 26,571 30,237
Total unrealized losses on held to maturity securities (2,607) (2,321)
Total fair value of unrealized losses on held to maturity securities $ 31,901 $ 30,237
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]    
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security 0 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ 0 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 0 $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 15 15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (5,066) $ (3,818)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 106,844 109,556
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (5,066) (3,818)
Debt Securities, Available-for-sale, Unrealized Loss Position 106,844 109,556
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 0 0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (4,334) (4,566)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 36,088 40,138
Total unrealized losses on held to maturity securities (4,334) (4,566)
Total fair value of unrealized losses on held to maturity securities $ 36,088 $ 40,138
Held to maturity, number of securities, less than 12 months    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 348 84
Held to maturity, number of securities, less than 12 months | US States and Political Subdivisions Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 327 81
Held to maturity, number of securities, less than 12 months | Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 0 0
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 15 1
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 2 2
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 4 0
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 0 0
Held to maturity, number of securities, 12 months or more    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 660 799
Held to maturity, number of securities, 12 months or more | US States and Political Subdivisions Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 407 543
Held to maturity, number of securities, 12 months or more | Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 18 18
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 100 102
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 43 43
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 79 80
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 13 13
v3.26.1
Investment Securities (Details Textual) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Investment Securities Information [Line Items]    
Debt Instrument, Collateral Amount $ 1,000,000 $ 1,200,000
Interest Receivable 181,916 161,118
Held to maturity allowance for credit loss 0 (100)
Federal Home Loan Bank Stock 215,000 154,400
Federal Reserve Bank Stock 114,400 98,100
Equity securities with readily determinable fair values, Fair Value 15,000 11,100
Equity securities 15,000 15,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss (1,700) 0
Held-to-maturity Securities [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 17,200 17,700
Available-for-sale Securities [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 25,100 23,000
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 4,100 2,800
Federal Reserve Bank Stock [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 0  
US Treasury Securities    
Investment Securities Information [Line Items]    
Held to maturity allowance for credit loss 0 0
US States and Political Subdivisions Debt Securities [Member]    
Investment Securities Information [Line Items]    
Held to maturity allowance for credit loss 0 0
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]    
Investment Securities Information [Line Items]    
Held to maturity allowance for credit loss $ 0 $ 0
v3.26.1
Loans Composition (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income $ 36,467,040 $ 31,163,614
Commercial and Industrial Sector [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 13,750,175 11,799,757
Commercial Real Estate Owner Occupied Portfolio [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 1,575,445 1,186,324
Commercial And Business Lending [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 15,325,620 12,986,081
Commercial Real Estate Investor Portfolio Segment [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 6,492,950 5,246,030
Construction Loans [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 2,546,186 1,994,642
Commercial Real Estate Portfolio Segment [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 9,039,136 7,240,672
Commercial Portfolio Segment [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 24,364,756 20,226,753
Residential Mortgage [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 6,808,398 6,793,957
Automobile Loan [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 4,044,416 3,106,498
Home Equity Line of Credit [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 826,343 713,271
Other Consumer [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income 423,127 323,135
Consumer Portfolio Segment [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Loans and Leases Receivable, Net of Deferred Income $ 12,102,284 $ 10,936,861
v3.26.1
Loans, Credit Quality Indicator by Vintage Year (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan $ 15,883 $ 29,616
Financing Receivable, Revolving 5,014,458 3,116,131
Financing Receivable, Originated in Current Fiscal Year 4,925,687 8,166,390
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 8,323,299 5,036,328
Financing Receivable, Originated Two Years before Latest Fiscal Year 4,739,698 3,176,275
Financing Receivable, Originated Three Years before Latest Fiscal Year 2,817,909 4,755,999
Financing Receivable, Originated Four Years before Latest Fiscal Year 4,149,217 2,807,454
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 6,496,772 4,105,037
Financing Receivable, before Allowance for Credit Loss, Total 36,467,040 31,163,614
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 17,507 13,618
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 255 1,281
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 1,451 10,882
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 1,476 6,954
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 2,353 20,237
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 2,216 1,115
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 9,234 866
Financing Receivable, Allowance for Credit Loss, Writeoff 34,492 54,953
Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 14,844 19,486
Financing Receivable, Revolving 4,825,831 3,022,323
Financing Receivable, Originated in Current Fiscal Year 4,752,001 7,884,671
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 8,097,981 4,863,126
Financing Receivable, Originated Two Years before Latest Fiscal Year 4,600,049 3,038,220
Financing Receivable, Originated Three Years before Latest Fiscal Year 2,673,341 4,191,311
Financing Receivable, Originated Four Years before Latest Fiscal Year 3,560,790 2,645,685
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 6,217,691 4,040,407
Financing Receivable, before Allowance for Credit Loss, Total 34,727,684 29,685,743
Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 79 327
Financing Receivable, Revolving 28,354 12,330
Financing Receivable, Originated in Current Fiscal Year 34,079 64,024
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 38,391 23,510
Financing Receivable, Originated Two Years before Latest Fiscal Year 48,768 35,024
Financing Receivable, Originated Three Years before Latest Fiscal Year 60,612 116,368
Financing Receivable, Originated Four Years before Latest Fiscal Year 140,049 51,985
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 109,691 6,930
Financing Receivable, before Allowance for Credit Loss, Total 459,944 310,171
Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 668 7,290
Financing Receivable, Revolving 155,663 81,270
Financing Receivable, Originated in Current Fiscal Year 137,054 214,481
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 153,256 137,311
Financing Receivable, Originated Two Years before Latest Fiscal Year 79,600 94,774
Financing Receivable, Originated Three Years before Latest Fiscal Year 68,181 423,143
Financing Receivable, Originated Four Years before Latest Fiscal Year 424,264 100,093
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 111,441 16,200
Financing Receivable, before Allowance for Credit Loss, Total 1,129,459 1,067,272
Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 292 2,513
Financing Receivable, Revolving 4,610 208
Financing Receivable, Originated in Current Fiscal Year 2,553 3,214
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 33,671 12,381
Financing Receivable, Originated Two Years before Latest Fiscal Year 11,281 8,257
Financing Receivable, Originated Three Years before Latest Fiscal Year 15,775 25,177
Financing Receivable, Originated Four Years before Latest Fiscal Year 24,114 9,691
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 57,949 41,500
Financing Receivable, before Allowance for Credit Loss, Total 149,953 100,428
Commercial Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 3,887 12,461
Financing Receivable, Revolving 4,023,830 2,233,015
Financing Receivable, Originated in Current Fiscal Year 3,848,831 6,608,437
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 6,559,828 3,942,739
Financing Receivable, Originated Two Years before Latest Fiscal Year 3,588,428 2,130,374
Financing Receivable, Originated Three Years before Latest Fiscal Year 1,852,509 2,839,853
Financing Receivable, Originated Four Years before Latest Fiscal Year 2,293,210 1,266,791
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 2,198,120 1,205,544
Financing Receivable, before Allowance for Credit Loss, Total 24,364,756 20,226,753
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 13,356 5,424
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 135 831
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 160 8,983
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 254 3,852
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 712 16,465
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 425 379
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 8,901 0
Financing Receivable, Allowance for Credit Loss, Writeoff 23,943 35,934
Commercial Portfolio Segment [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 3,199 3,698
Financing Receivable, Revolving 3,838,187 2,142,980
Financing Receivable, Originated in Current Fiscal Year 3,680,977 6,330,026
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 6,339,776 3,775,243
Financing Receivable, Originated Two Years before Latest Fiscal Year 3,456,788 2,001,877
Financing Receivable, Originated Three Years before Latest Fiscal Year 1,720,453 2,293,440
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,721,148 1,115,063
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 1,970,926 1,182,658
Financing Receivable, before Allowance for Credit Loss, Total 22,728,255 18,841,287
Commercial Portfolio Segment [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 27,367 11,139
Financing Receivable, Originated in Current Fiscal Year 33,995 63,702
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 37,027 23,066
Financing Receivable, Originated Two Years before Latest Fiscal Year 47,995 34,015
Financing Receivable, Originated Three Years before Latest Fiscal Year 59,697 115,634
Financing Receivable, Originated Four Years before Latest Fiscal Year 139,340 51,935
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 108,446 6,542
Financing Receivable, before Allowance for Credit Loss, Total 453,867 306,033
Commercial Portfolio Segment [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 668 7,290
Financing Receivable, Revolving 154,030 78,896
Financing Receivable, Originated in Current Fiscal Year 131,699 214,481
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 153,256 136,731
Financing Receivable, Originated Two Years before Latest Fiscal Year 79,028 94,482
Financing Receivable, Originated Three Years before Latest Fiscal Year 67,815 423,014
Financing Receivable, Originated Four Years before Latest Fiscal Year 423,810 99,793
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 111,195 16,200
Financing Receivable, before Allowance for Credit Loss, Total 1,120,833 1,063,597
Commercial Portfolio Segment [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 20 1,473
Financing Receivable, Revolving 4,246 0
Financing Receivable, Originated in Current Fiscal Year 2,160 228
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 29,769 7,699
Financing Receivable, Originated Two Years before Latest Fiscal Year 4,617 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 4,544 7,765
Financing Receivable, Originated Four Years before Latest Fiscal Year 8,912 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 7,553 144
Financing Receivable, before Allowance for Credit Loss, Total 61,801 15,836
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 3,887 9,266
Financing Receivable, Revolving 2,859,539 1,996,941
Financing Receivable, Originated in Current Fiscal Year 2,370,009 3,950,522
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 3,875,412 2,183,997
Financing Receivable, Originated Two Years before Latest Fiscal Year 1,784,347 1,169,773
Financing Receivable, Originated Three Years before Latest Fiscal Year 1,009,346 1,407,631
Financing Receivable, Originated Four Years before Latest Fiscal Year 977,459 616,995
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 874,063 473,898
Financing Receivable, before Allowance for Credit Loss, Total 13,750,175 11,799,757
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 13,356 5,424
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 135 831
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 160 627
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 254 3,555
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 712 3,799
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 425 379
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 6,191 0
Financing Receivable, Allowance for Credit Loss, Writeoff 21,233 14,615
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 3,199 503
Financing Receivable, Revolving 2,741,443 1,920,351
Financing Receivable, Originated in Current Fiscal Year 2,328,388 3,886,880
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 3,787,950 2,097,760
Financing Receivable, Originated Two Years before Latest Fiscal Year 1,722,490 1,133,873
Financing Receivable, Originated Three Years before Latest Fiscal Year 982,648 1,238,941
Financing Receivable, Originated Four Years before Latest Fiscal Year 840,913 521,793
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 738,339 471,834
Financing Receivable, before Allowance for Credit Loss, Total 13,142,171 11,271,432
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 22,708 11,139
Financing Receivable, Originated in Current Fiscal Year 626 3,024
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 26,761 311
Financing Receivable, Originated Two Years before Latest Fiscal Year 24,508 13,774
Financing Receivable, Originated Three Years before Latest Fiscal Year 9,346 5,849
Financing Receivable, Originated Four Years before Latest Fiscal Year 5,458 24,971
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 72,581 293
Financing Receivable, before Allowance for Credit Loss, Total 161,988 59,361
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 668 7,290
Financing Receivable, Revolving 94,753 65,451
Financing Receivable, Originated in Current Fiscal Year 38,835 60,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 33,522 78,773
Financing Receivable, Originated Two Years before Latest Fiscal Year 32,732 22,126
Financing Receivable, Originated Three Years before Latest Fiscal Year 12,846 162,841
Financing Receivable, Originated Four Years before Latest Fiscal Year 130,614 70,231
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 58,326 1,771
Financing Receivable, before Allowance for Credit Loss, Total 401,628 461,786
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 20 1,473
Financing Receivable, Revolving 635 0
Financing Receivable, Originated in Current Fiscal Year 2,160 25
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 27,179 7,153
Financing Receivable, Originated Two Years before Latest Fiscal Year 4,617 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 4,506 0
Financing Receivable, Originated Four Years before Latest Fiscal Year 474 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 4,817 0
Financing Receivable, before Allowance for Credit Loss, Total 44,388 7,178
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 195,525 16,402
Financing Receivable, Originated in Current Fiscal Year 131,562 248,822
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 256,428 206,488
Financing Receivable, Originated Two Years before Latest Fiscal Year 219,089 162,321
Financing Receivable, Originated Three Years before Latest Fiscal Year 163,515 169,187
Financing Receivable, Originated Four Years before Latest Fiscal Year 198,237 169,766
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 411,089 213,338
Financing Receivable, before Allowance for Credit Loss, Total 1,575,445 1,186,324
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 0 0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0 113
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Allowance for Credit Loss, Writeoff 0 113
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 182,249 2,957
Financing Receivable, Originated in Current Fiscal Year 129,676 241,141
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 247,821 180,867
Financing Receivable, Originated Two Years before Latest Fiscal Year 199,462 141,254
Financing Receivable, Originated Three Years before Latest Fiscal Year 146,763 167,496
Financing Receivable, Originated Four Years before Latest Fiscal Year 197,576 157,837
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 380,833 201,588
Financing Receivable, before Allowance for Credit Loss, Total 1,484,380 1,093,140
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 1,363 0
Financing Receivable, Originated in Current Fiscal Year 0 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 4,713 11,620
Financing Receivable, Originated Two Years before Latest Fiscal Year 5,016 5,432
Financing Receivable, Originated Three Years before Latest Fiscal Year 2,059 0
Financing Receivable, Originated Four Years before Latest Fiscal Year 90 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 5,980 1,242
Financing Receivable, before Allowance for Credit Loss, Total 19,221 18,294
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 11,913 13,445
Financing Receivable, Originated in Current Fiscal Year 1,886 7,478
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 2,097 14,001
Financing Receivable, Originated Two Years before Latest Fiscal Year 14,611 15,635
Financing Receivable, Originated Three Years before Latest Fiscal Year 14,693 1,691
Financing Receivable, Originated Four Years before Latest Fiscal Year 47 11,929
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 23,342 10,508
Financing Receivable, before Allowance for Credit Loss, Total 68,589 74,687
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 0 203
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,797 0
Financing Receivable, Originated Two Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Four Years before Latest Fiscal Year 524 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 934 0
Financing Receivable, before Allowance for Credit Loss, Total 3,255 203
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 3,887 9,266
Financing Receivable, Revolving 3,055,064 2,013,343
Financing Receivable, Originated in Current Fiscal Year 2,501,571 4,199,344
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 4,131,840 2,390,485
Financing Receivable, Originated Two Years before Latest Fiscal Year 2,003,436 1,332,094
Financing Receivable, Originated Three Years before Latest Fiscal Year 1,172,861 1,576,818
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,175,696 786,761
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 1,285,152 687,236
Financing Receivable, before Allowance for Credit Loss, Total 15,325,620 12,986,081
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 13,356 5,424
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 135 831
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 160 627
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 254 3,668
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 712 3,799
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 425 379
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 6,191 0
Financing Receivable, Allowance for Credit Loss, Writeoff 21,233 14,728
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 3,199 503
Financing Receivable, Revolving 2,923,692 1,923,308
Financing Receivable, Originated in Current Fiscal Year 2,458,064 4,128,021
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 4,035,771 2,278,627
Financing Receivable, Originated Two Years before Latest Fiscal Year 1,921,952 1,275,127
Financing Receivable, Originated Three Years before Latest Fiscal Year 1,129,411 1,406,437
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,038,489 679,630
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 1,119,172 673,422
Financing Receivable, before Allowance for Credit Loss, Total 14,626,551 12,364,572
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 24,071 11,139
Financing Receivable, Originated in Current Fiscal Year 626 3,024
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 31,474 11,931
Financing Receivable, Originated Two Years before Latest Fiscal Year 29,524 19,206
Financing Receivable, Originated Three Years before Latest Fiscal Year 11,405 5,849
Financing Receivable, Originated Four Years before Latest Fiscal Year 5,548 24,971
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 78,561 1,535
Financing Receivable, before Allowance for Credit Loss, Total 181,209 77,655
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 668 7,290
Financing Receivable, Revolving 106,666 78,896
Financing Receivable, Originated in Current Fiscal Year 40,721 68,071
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 35,619 92,774
Financing Receivable, Originated Two Years before Latest Fiscal Year 47,343 37,761
Financing Receivable, Originated Three Years before Latest Fiscal Year 27,539 164,532
Financing Receivable, Originated Four Years before Latest Fiscal Year 130,661 82,160
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 81,668 12,279
Financing Receivable, before Allowance for Credit Loss, Total 470,217 536,473
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 20 1,473
Financing Receivable, Revolving 635 0
Financing Receivable, Originated in Current Fiscal Year 2,160 228
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 28,976 7,153
Financing Receivable, Originated Two Years before Latest Fiscal Year 4,617 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 4,506 0
Financing Receivable, Originated Four Years before Latest Fiscal Year 998 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 5,751 0
Financing Receivable, before Allowance for Credit Loss, Total 47,643 7,381
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 3,195
Financing Receivable, Revolving 718,407 185,825
Financing Receivable, Originated in Current Fiscal Year 1,106,101 1,906,552
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,780,755 789,314
Financing Receivable, Originated Two Years before Latest Fiscal Year 689,885 526,061
Financing Receivable, Originated Three Years before Latest Fiscal Year 492,296 848,843
Financing Receivable, Originated Four Years before Latest Fiscal Year 799,524 477,039
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 905,982 512,396
Financing Receivable, before Allowance for Credit Loss, Total 6,492,950 5,246,030
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 0 0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0 8,356
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0 184
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0 12,666
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 2,710 0
Financing Receivable, Allowance for Credit Loss, Writeoff 2,710 21,206
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 3,195
Financing Receivable, Revolving 695,209 185,825
Financing Receivable, Originated in Current Fiscal Year 1,061,877 1,842,395
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,762,223 776,187
Financing Receivable, Originated Two Years before Latest Fiscal Year 662,819 503,511
Financing Receivable, Originated Three Years before Latest Fiscal Year 438,221 711,947
Financing Receivable, Originated Four Years before Latest Fiscal Year 679,245 432,442
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 844,791 503,468
Financing Receivable, before Allowance for Credit Loss, Total 6,144,385 4,955,775
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 633 0
Financing Receivable, Originated in Current Fiscal Year 33,369 40,067
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 5,553 11,135
Financing Receivable, Originated Two Years before Latest Fiscal Year 3,066 14,809
Financing Receivable, Originated Three Years before Latest Fiscal Year 48,292 58,523
Financing Receivable, Originated Four Years before Latest Fiscal Year 58,136 26,964
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 29,885 5,007
Financing Receivable, before Allowance for Credit Loss, Total 178,934 156,505
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 21,867 0
Financing Receivable, Originated in Current Fiscal Year 10,855 24,090
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 12,186 1,446
Financing Receivable, Originated Two Years before Latest Fiscal Year 24,000 7,741
Financing Receivable, Originated Three Years before Latest Fiscal Year 5,783 70,608
Financing Receivable, Originated Four Years before Latest Fiscal Year 54,229 17,633
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 29,527 3,921
Financing Receivable, before Allowance for Credit Loss, Total 158,447 125,439
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 698 0
Financing Receivable, Originated in Current Fiscal Year 0 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 793 546
Financing Receivable, Originated Two Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 0 7,765
Financing Receivable, Originated Four Years before Latest Fiscal Year 7,914 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 1,779 0
Financing Receivable, before Allowance for Credit Loss, Total 11,184 8,311
Commercial Portfolio Segment [Member] | Construction Loans [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 250,359 33,847
Financing Receivable, Originated in Current Fiscal Year 241,159 502,541
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 647,233 762,940
Financing Receivable, Originated Two Years before Latest Fiscal Year 895,107 272,219
Financing Receivable, Originated Three Years before Latest Fiscal Year 187,352 414,192
Financing Receivable, Originated Four Years before Latest Fiscal Year 317,990 2,991
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 6,986 5,912
Financing Receivable, before Allowance for Credit Loss, Total 2,546,186 1,994,642
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 0 0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 219,286 33,847
Financing Receivable, Originated in Current Fiscal Year 161,036 359,610
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 541,782 720,429
Financing Receivable, Originated Two Years before Latest Fiscal Year 872,017 223,239
Financing Receivable, Originated Three Years before Latest Fiscal Year 152,821 175,056
Financing Receivable, Originated Four Years before Latest Fiscal Year 3,414 2,991
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 6,963 5,768
Financing Receivable, before Allowance for Credit Loss, Total 1,957,319 1,520,940
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 2,663 0
Financing Receivable, Originated in Current Fiscal Year 0 20,611
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 0 0
Financing Receivable, Originated Two Years before Latest Fiscal Year 15,405 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 0 51,262
Financing Receivable, Originated Four Years before Latest Fiscal Year 75,656 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 0 0
Financing Receivable, before Allowance for Credit Loss, Total 93,724 71,873
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 25,497 0
Financing Receivable, Originated in Current Fiscal Year 80,123 122,320
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 105,451 42,511
Financing Receivable, Originated Two Years before Latest Fiscal Year 7,685 48,980
Financing Receivable, Originated Three Years before Latest Fiscal Year 34,493 187,874
Financing Receivable, Originated Four Years before Latest Fiscal Year 238,920 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 0 0
Financing Receivable, before Allowance for Credit Loss, Total 492,169 401,685
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 2,913 0
Financing Receivable, Originated in Current Fiscal Year 0 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 0 0
Financing Receivable, Originated Two Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 38 0
Financing Receivable, Originated Four Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 23 144
Financing Receivable, before Allowance for Credit Loss, Total 2,974 144
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 3,195
Financing Receivable, Revolving 968,766 219,672
Financing Receivable, Originated in Current Fiscal Year 1,347,260 2,409,093
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 2,427,988 1,552,254
Financing Receivable, Originated Two Years before Latest Fiscal Year 1,584,992 798,280
Financing Receivable, Originated Three Years before Latest Fiscal Year 679,648 1,263,035
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,117,514 480,030
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 912,968 518,308
Financing Receivable, before Allowance for Credit Loss, Total 9,039,136 7,240,672
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 0 0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0 8,356
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0 184
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0 12,666
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0 0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 2,710 0
Financing Receivable, Allowance for Credit Loss, Writeoff 2,710 21,206
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 3,195
Financing Receivable, Revolving 914,495 219,672
Financing Receivable, Originated in Current Fiscal Year 1,222,913 2,202,005
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 2,304,005 1,496,616
Financing Receivable, Originated Two Years before Latest Fiscal Year 1,534,836 726,750
Financing Receivable, Originated Three Years before Latest Fiscal Year 591,042 887,003
Financing Receivable, Originated Four Years before Latest Fiscal Year 682,659 435,433
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 851,754 509,236
Financing Receivable, before Allowance for Credit Loss, Total 8,101,704 6,476,715
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 3,296 0
Financing Receivable, Originated in Current Fiscal Year 33,369 60,678
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 5,553 11,135
Financing Receivable, Originated Two Years before Latest Fiscal Year 18,471 14,809
Financing Receivable, Originated Three Years before Latest Fiscal Year 48,292 109,785
Financing Receivable, Originated Four Years before Latest Fiscal Year 133,792 26,964
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 29,885 5,007
Financing Receivable, before Allowance for Credit Loss, Total 272,658 228,378
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 47,364 0
Financing Receivable, Originated in Current Fiscal Year 90,978 146,410
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 117,637 43,957
Financing Receivable, Originated Two Years before Latest Fiscal Year 31,685 56,721
Financing Receivable, Originated Three Years before Latest Fiscal Year 40,276 258,482
Financing Receivable, Originated Four Years before Latest Fiscal Year 293,149 17,633
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 29,527 3,921
Financing Receivable, before Allowance for Credit Loss, Total 650,616 527,124
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 3,611 0
Financing Receivable, Originated in Current Fiscal Year 0 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 793 546
Financing Receivable, Originated Two Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 38 7,765
Financing Receivable, Originated Four Years before Latest Fiscal Year 7,914 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 1,802 144
Financing Receivable, before Allowance for Credit Loss, Total 14,158 8,455
Consumer Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 11,996 17,155
Financing Receivable, Revolving 990,628 883,116
Financing Receivable, Originated in Current Fiscal Year 1,076,856 1,557,953
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,763,471 1,093,589
Financing Receivable, Originated Two Years before Latest Fiscal Year 1,151,270 1,045,901
Financing Receivable, Originated Three Years before Latest Fiscal Year 965,400 1,916,146
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,856,007 1,540,663
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 4,298,652 2,899,493
Financing Receivable, before Allowance for Credit Loss, Total 12,102,284 10,936,861
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 4,151 8,194
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 120 450
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 1,291 1,899
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 1,222 3,102
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 1,641 3,772
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 1,791 736
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 333 866
Financing Receivable, Allowance for Credit Loss, Writeoff 10,549 19,019
Consumer Loan [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 11,645 15,788
Financing Receivable, Revolving 987,644 879,343
Financing Receivable, Originated in Current Fiscal Year 1,071,024 1,554,645
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,758,205 1,087,883
Financing Receivable, Originated Two Years before Latest Fiscal Year 1,143,261 1,036,343
Financing Receivable, Originated Three Years before Latest Fiscal Year 952,888 1,897,871
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,839,642 1,530,622
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 4,246,765 2,857,749
Financing Receivable, before Allowance for Credit Loss, Total 11,999,429 10,844,456
Consumer Loan [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 79 327
Financing Receivable, Revolving 987 1,191
Financing Receivable, Originated in Current Fiscal Year 84 322
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,364 444
Financing Receivable, Originated Two Years before Latest Fiscal Year 773 1,009
Financing Receivable, Originated Three Years before Latest Fiscal Year 915 734
Financing Receivable, Originated Four Years before Latest Fiscal Year 709 50
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 1,245 388
Financing Receivable, before Allowance for Credit Loss, Total 6,077 4,138
Consumer Loan [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 1,633 2,374
Financing Receivable, Originated in Current Fiscal Year 5,355 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 0 580
Financing Receivable, Originated Two Years before Latest Fiscal Year 572 292
Financing Receivable, Originated Three Years before Latest Fiscal Year 366 129
Financing Receivable, Originated Four Years before Latest Fiscal Year 454 300
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 246 0
Financing Receivable, before Allowance for Credit Loss, Total 8,626 3,675
Consumer Loan [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 272 1,040
Financing Receivable, Revolving 364 208
Financing Receivable, Originated in Current Fiscal Year 393 2,986
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 3,902 4,682
Financing Receivable, Originated Two Years before Latest Fiscal Year 6,664 8,257
Financing Receivable, Originated Three Years before Latest Fiscal Year 11,231 17,412
Financing Receivable, Originated Four Years before Latest Fiscal Year 15,202 9,691
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 50,396 41,356
Financing Receivable, before Allowance for Credit Loss, Total 88,152 84,592
Consumer Loan [Member] | Residential Mortgage [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 181,627 255,789
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 312,089 242,469
Financing Receivable, Originated Two Years before Latest Fiscal Year 259,029 485,469
Financing Receivable, Originated Three Years before Latest Fiscal Year 446,875 1,501,605
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,472,687 1,508,508
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 4,136,091 2,800,117
Financing Receivable, before Allowance for Credit Loss, Total 6,808,398 6,793,957
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 0 0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 6 115
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 57 209
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 66 320
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 24 74
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 107 430
Financing Receivable, Allowance for Credit Loss, Writeoff 260 1,148
Consumer Loan [Member] | Residential Mortgage [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 176,272 253,364
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 309,720 238,787
Financing Receivable, Originated Two Years before Latest Fiscal Year 254,049 480,076
Financing Receivable, Originated Three Years before Latest Fiscal Year 438,829 1,488,335
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,461,192 1,499,223
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 4,090,505 2,764,379
Financing Receivable, before Allowance for Credit Loss, Total 6,730,567 6,724,164
Consumer Loan [Member] | Residential Mortgage [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0  
Financing Receivable, Revolving 0  
Financing Receivable, Originated in Current Fiscal Year 0  
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 315  
Financing Receivable, Originated Two Years before Latest Fiscal Year 0  
Financing Receivable, Originated Three Years before Latest Fiscal Year 0  
Financing Receivable, Originated Four Years before Latest Fiscal Year 0  
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 188  
Financing Receivable, before Allowance for Credit Loss, Total 503  
Consumer Loan [Member] | Residential Mortgage [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 5,355 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 0 580
Financing Receivable, Originated Two Years before Latest Fiscal Year 572 292
Financing Receivable, Originated Three Years before Latest Fiscal Year 366 129
Financing Receivable, Originated Four Years before Latest Fiscal Year 454 300
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 246 0
Financing Receivable, before Allowance for Credit Loss, Total 6,993 1,301
Consumer Loan [Member] | Residential Mortgage [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 0 2,425
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 2,054 3,102
Financing Receivable, Originated Two Years before Latest Fiscal Year 4,408 5,101
Financing Receivable, Originated Three Years before Latest Fiscal Year 7,680 13,141
Financing Receivable, Originated Four Years before Latest Fiscal Year 11,041 8,985
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 45,152 35,738
Financing Receivable, before Allowance for Credit Loss, Total 70,335 68,492
Consumer Loan [Member] | Automobile Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 857,404 1,288,121
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,401,367 844,519
Financing Receivable, Originated Two Years before Latest Fiscal Year 869,717 555,174
Financing Receivable, Originated Three Years before Latest Fiscal Year 503,081 391,940
Financing Receivable, Originated Four Years before Latest Fiscal Year 355,263 26,742
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 57,584 2
Financing Receivable, before Allowance for Credit Loss, Total 4,044,416 3,106,498
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 0 0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 110 432
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 1,125 1,699
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 1,135 2,804
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 1,547 3,384
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 1,742 433
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 179 0
Financing Receivable, Allowance for Credit Loss, Writeoff 5,838 8,752
Consumer Loan [Member] | Automobile Loan [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 856,927 1,287,267
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,398,649 842,838
Financing Receivable, Originated Two Years before Latest Fiscal Year 867,078 551,549
Financing Receivable, Originated Three Years before Latest Fiscal Year 498,862 388,064
Financing Receivable, Originated Four Years before Latest Fiscal Year 351,555 26,402
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 57,048 2
Financing Receivable, before Allowance for Credit Loss, Total 4,030,119 3,096,122
Consumer Loan [Member] | Automobile Loan [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 84 295
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,032 325
Financing Receivable, Originated Two Years before Latest Fiscal Year 581 814
Financing Receivable, Originated Three Years before Latest Fiscal Year 868 621
Financing Receivable, Originated Four Years before Latest Fiscal Year 625 50
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 134 0
Financing Receivable, before Allowance for Credit Loss, Total 3,324 2,105
Consumer Loan [Member] | Automobile Loan [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 0 0
Financing Receivable, Originated in Current Fiscal Year 393 559
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 1,686 1,356
Financing Receivable, Originated Two Years before Latest Fiscal Year 2,058 2,811
Financing Receivable, Originated Three Years before Latest Fiscal Year 3,351 3,255
Financing Receivable, Originated Four Years before Latest Fiscal Year 3,083 290
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 402 0
Financing Receivable, before Allowance for Credit Loss, Total 10,973 8,271
Consumer Loan [Member] | Home Equity Line of Credit [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 11,911 16,612
Financing Receivable, Revolving 727,169 624,078
Financing Receivable, Originated in Current Fiscal Year 1,158 857
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 5,355 2,528
Financing Receivable, Originated Two Years before Latest Fiscal Year 4,218 3,251
Financing Receivable, Originated Three Years before Latest Fiscal Year 5,045 21,634
Financing Receivable, Originated Four Years before Latest Fiscal Year 22,332 5,147
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 61,066 55,776
Financing Receivable, before Allowance for Credit Loss, Total 826,343 713,271
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 1 0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 0 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 60 0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0 26
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 2 5
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 13 5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 16 380
Financing Receivable, Allowance for Credit Loss, Writeoff 92 416
Consumer Loan [Member] | Home Equity Line of Credit [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 11,561 15,259
Financing Receivable, Revolving 726,750 623,853
Financing Receivable, Originated in Current Fiscal Year 1,158 855
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 5,253 2,188
Financing Receivable, Originated Two Years before Latest Fiscal Year 3,937 2,728
Financing Receivable, Originated Three Years before Latest Fiscal Year 4,886 20,514
Financing Receivable, Originated Four Years before Latest Fiscal Year 21,268 4,733
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 55,324 49,793
Financing Receivable, before Allowance for Credit Loss, Total 818,576 704,664
Consumer Loan [Member] | Home Equity Line of Credit [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 78 315
Financing Receivable, Revolving 102 52
Financing Receivable, Originated in Current Fiscal Year 0 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 0 119
Financing Receivable, Originated Two Years before Latest Fiscal Year 130 190
Financing Receivable, Originated Three Years before Latest Fiscal Year 0 104
Financing Receivable, Originated Four Years before Latest Fiscal Year 39 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 914 368
Financing Receivable, before Allowance for Credit Loss, Total 1,185 833
Consumer Loan [Member] | Home Equity Line of Credit [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 272 1,038
Financing Receivable, Revolving 317 173
Financing Receivable, Originated in Current Fiscal Year 0 2
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 102 221
Financing Receivable, Originated Two Years before Latest Fiscal Year 151 333
Financing Receivable, Originated Three Years before Latest Fiscal Year 159 1,016
Financing Receivable, Originated Four Years before Latest Fiscal Year 1,025 414
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 4,828 5,615
Financing Receivable, before Allowance for Credit Loss, Total 6,582 7,774
Consumer Loan [Member] | Other Consumer [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 85 543
Financing Receivable, Revolving 263,459 259,038
Financing Receivable, Originated in Current Fiscal Year 36,667 13,186
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 44,660 4,073
Financing Receivable, Originated Two Years before Latest Fiscal Year 18,306 2,007
Financing Receivable, Originated Three Years before Latest Fiscal Year 10,399 967
Financing Receivable, Originated Four Years before Latest Fiscal Year 5,725 266
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 43,911 43,598
Financing Receivable, before Allowance for Credit Loss, Total 423,127 323,135
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]    
Financing Receivable, Revolving, Writeoff 4,150 8,194
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 10 18
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 100 85
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 30 63
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 26 63
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 12 224
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 31 56
Financing Receivable, Allowance for Credit Loss, Writeoff 4,359 8,703
Consumer Loan [Member] | Other Consumer [Member] | Pass [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 84 529
Financing Receivable, Revolving 260,894 255,490
Financing Receivable, Originated in Current Fiscal Year 36,667 13,159
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 44,583 4,070
Financing Receivable, Originated Two Years before Latest Fiscal Year 18,197 1,990
Financing Receivable, Originated Three Years before Latest Fiscal Year 10,311 958
Financing Receivable, Originated Four Years before Latest Fiscal Year 5,627 264
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 43,888 43,575
Financing Receivable, before Allowance for Credit Loss, Total 420,167 319,506
Consumer Loan [Member] | Other Consumer [Member] | Special Mention [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 1 12
Financing Receivable, Revolving 885 1,139
Financing Receivable, Originated in Current Fiscal Year 0 27
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 17 0
Financing Receivable, Originated Two Years before Latest Fiscal Year 62 5
Financing Receivable, Originated Three Years before Latest Fiscal Year 47 9
Financing Receivable, Originated Four Years before Latest Fiscal Year 45 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 9 20
Financing Receivable, before Allowance for Credit Loss, Total 1,065 1,200
Consumer Loan [Member] | Other Consumer [Member] | Substandard [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 0
Financing Receivable, Revolving 1,633 2,374
Financing Receivable, Originated in Current Fiscal Year 0 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 0 0
Financing Receivable, Originated Two Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Three Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Four Years before Latest Fiscal Year 0 0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 0 0
Financing Receivable, before Allowance for Credit Loss, Total 1,633 2,374
Consumer Loan [Member] | Other Consumer [Member] | Nonaccrual Loan [Member]    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing Receivable, Revolving, Converted To Term Loan 0 2
Financing Receivable, Revolving 47 35
Financing Receivable, Originated in Current Fiscal Year 0 0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 60 3
Financing Receivable, Originated Two Years before Latest Fiscal Year 47 12
Financing Receivable, Originated Three Years before Latest Fiscal Year 41 0
Financing Receivable, Originated Four Years before Latest Fiscal Year 53 2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year 14 3
Financing Receivable, before Allowance for Credit Loss, Total $ 262 $ 55
v3.26.1
Loans Past Due Status (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total $ 36,467,040 $ 36,467,040 $ 31,163,614
Financing Receivable, Nonaccrual 149,953 149,953 100,428
Nonaccrual Loans, Current Portion $ 78,900 $ 78,900 $ 31,200
Percent of current nonaccrual loans 53.00% 53.00% 31.00%
Financing Receivable, Nonaccrual, Interest Income $ 0 $ 0 $ 0
Financing Receivable, Nonaccrual, No Allowance 18,200 18,200 14,600
Commercial and Industrial Sector      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 13,750,175 13,750,175 11,799,757
Financing Receivable, Nonaccrual 44,388 44,388 7,178
Commercial Real Estate Owner Occupied Portfolio [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,575,445 1,575,445 1,186,324
Financing Receivable, Nonaccrual 3,255 3,255 203
Commercial And Business Lending [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 15,325,620 15,325,620 12,986,081
Financing Receivable, Nonaccrual 47,643 47,643 7,381
Commercial Real Estate Investor Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 6,492,950 6,492,950 5,246,030
Financing Receivable, Nonaccrual 11,184 11,184 8,311
Construction Loans [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 2,546,186 2,546,186 1,994,642
Financing Receivable, Nonaccrual 2,974 2,974 144
Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 9,039,136 9,039,136 7,240,672
Financing Receivable, Nonaccrual 14,158 14,158 8,455
Commercial Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 24,364,756 24,364,756 20,226,753
Financing Receivable, Nonaccrual 61,801 61,801 15,836
Residential Mortgage [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 6,808,398 6,808,398 6,793,957
Financing Receivable, Nonaccrual 70,335 70,335 68,492
Automobile Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 4,044,416 4,044,416 3,106,498
Financing Receivable, Nonaccrual 10,973 10,973 8,271
Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 826,343 826,343 713,271
Financing Receivable, Nonaccrual 6,582 6,582 7,774
Other Consumer [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 423,127 423,127 323,135
Financing Receivable, Nonaccrual 262 262 55
Consumer Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 12,102,284 12,102,284 10,936,861
Financing Receivable, Nonaccrual 88,152 88,152 84,592
Financial Asset, Not Past Due [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 36,256,787 36,256,787 31,002,071
Financial Asset, Not Past Due [Member] | Commercial and Industrial Sector      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 13,694,693 13,694,693 11,789,526
Financial Asset, Not Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,571,158 1,571,158 1,186,087
Financial Asset, Not Past Due [Member] | Commercial And Business Lending [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 15,265,851 15,265,851 12,975,613
Financial Asset, Not Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 6,478,677 6,478,677 5,218,314
Financial Asset, Not Past Due [Member] | Construction Loans [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 2,541,775 2,541,775 1,994,381
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 9,020,452 9,020,452 7,212,695
Financial Asset, Not Past Due [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 24,286,303 24,286,303 20,188,308
Financial Asset, Not Past Due [Member] | Residential Mortgage [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 6,724,029 6,724,029 6,712,330
Financial Asset, Not Past Due [Member] | Automobile Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 4,013,076 4,013,076 3,081,782
Financial Asset, Not Past Due [Member] | Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 815,225 815,225 701,719
Financial Asset, Not Past Due [Member] | Other Consumer [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 418,154 418,154 317,932
Financial Asset, Not Past Due [Member] | Consumer Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 11,970,484 11,970,484 10,813,763
Financial Asset, 30 to 59 Days Past Due [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 39,971 39,971 48,311
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial Sector      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 834 834 2,153
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 893 893 0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial And Business Lending [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,727 1,727 2,153
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,839 1,839 14,148
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 581 581 117
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 2,420 2,420 14,265
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 4,147 4,147 16,418
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 13,531 13,531 13,135
Financial Asset, 30 to 59 Days Past Due [Member] | Automobile Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 17,043 17,043 14,340
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 3,351 3,351 2,945
Financial Asset, 30 to 59 Days Past Due [Member] | Other Consumer [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,899 1,899 1,473
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 35,824 35,824 31,893
Financial Asset, 60 to 89 Days Past Due [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 18,041 18,041 9,990
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial Sector      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 9,834 9,834 530
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 0 0 34
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial And Business Lending [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 9,834 9,834 564
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,250 1,250 5,257
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 856 856 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 2,106 2,106 5,257
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 11,940 11,940 5,821
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 503 503 0
Financial Asset, 60 to 89 Days Past Due [Member] | Automobile Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 3,324 3,324 2,105
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,185 1,185 833
Financial Asset, 60 to 89 Days Past Due [Member] | Other Consumer [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,089 1,089 1,231
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 6,101 6,101 4,169
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 2,288 2,288 2,814
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial Sector      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 426 426 370
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 139 139 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial And Business Lending [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 565 565 370
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 0 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 0 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 0 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 565 565 370
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Mortgage [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 0 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Automobile Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 0 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 0 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Consumer [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total 1,723 1,723 2,444
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Loans and Leases Receivable, Net of Deferred Income, Total $ 1,723 $ 1,723 $ 2,444
v3.26.1
Loans, Modifications (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified, Weighted Average Term, Range, From 300 months 268 months 305 months 267 months
Financing Receivable, Modified, Weighted Average Term, Range, To 418 months 426 months 412 months 414 months
Interest Rate Below Market Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified in Period, Amount $ 847 $ 891 $ 1,603 $ 1,823
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification (9.00%) (10.00%) (6.00%) (8.00%)
Extended Maturity [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified, Weighted Average Term Increase from Modification 118 months 158 months 107 months 147 months
Extended Maturity and Interest Rate Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified in Period, Amount $ 1,174 $ 658 $ 3,551 $ 2,219
Commercial and Industrial Sector | Interest Rate Below Market Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified in Period, Amount $ 120 $ 154 $ 273 $ 294
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification (22.00%) (23.00%) (22.00%) (24.00%)
Residential Mortgage [Member] | Interest Rate Below Market Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification 0.00% 2.00% 1.00% 1.00%
Residential Mortgage [Member] | Extended Maturity [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified in Period, Amount $ 553 $ 305 $ 1,059 $ 305
Financing Receivable, Modified, Weighted Average Term Increase from Modification 115 months 165 months 107 months 152 months
Residential Mortgage [Member] | Extended Maturity and Interest Rate Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified in Period, Amount $ 1,137 $ 591 $ 3,463 $ 2,094
Home Equity Line of Credit [Member] | Interest Rate Below Market Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification (2.00%) 0.00% (2.00%) (2.00%)
Home Equity Line of Credit [Member] | Extended Maturity [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified, Weighted Average Term Increase from Modification 240 months 60 months 131 months 60 months
Home Equity Line of Credit [Member] | Extended Maturity and Interest Rate Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified in Period, Amount $ 37 $ 67 $ 88 $ 125
Other Consumer [Member] | Interest Rate Below Market Reduction [Member]        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Modified in Period, Amount $ 727 $ 737 $ 1,330 $ 1,529
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification (22.00%) (21.00%) (21.00%) (21.00%)
v3.26.1
Loans, Modifications in Last 12 Months, Performance - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Financial Asset, Not Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount $ 9,170 $ 6,427
Financial Asset, 30-89 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 943 635
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 1,210 702
Commercial and Industrial Sector | Financial Asset, Not Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 367 431
Commercial and Industrial Sector | Financial Asset, 30-89 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Commercial and Industrial Sector | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Residential Mortgage [Member] | Financial Asset, Not Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 6,509 3,406
Residential Mortgage [Member] | Financial Asset, 30-89 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 943 605
Residential Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 1,183 702
Home Equity Line of Credit [Member] | Financial Asset, Not Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 239 288
Home Equity Line of Credit [Member] | Financial Asset, 30-89 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 0 31
Home Equity Line of Credit [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 27 0
Other Consumer [Member] | Financial Asset, Not Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 2,055 2,303
Other Consumer [Member] | Financial Asset, 30-89 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Other Consumer [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]    
Financing Receivable, Modified in Period, Amount $ 0 $ 0
v3.26.1
Loans, Modified, Subsequent Default (Details) - Residential Mortgage [Member]
$ in Thousands
 6 Months Ended
Jun. 30, 2026
USD ($)
Interest Rate Below Market Reduction [Member]  
Financing Receivable, Modified, Subsequent Default [Line Items]  
Financing Receivable, Modified, Subsequent Default $ 0
Extended Maturity [Member]  
Financing Receivable, Modified, Subsequent Default [Line Items]  
Financing Receivable, Modified, Subsequent Default 0
Extended Maturity and Interest Rate Reduction [Member]  
Financing Receivable, Modified, Subsequent Default [Line Items]  
Financing Receivable, Modified, Subsequent Default $ 303
v3.26.1
Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     $ 34,492   $ 54,953
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     1,871    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     3,597    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     41,276 $ 38,776 38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     4,000   2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance $ 50,744   50,744   41,276
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     34,492   54,953
Provision for Loan, Lease, and Other Losses 19,388 $ 17,996 30,389 30,999  
Allowance for Loan Losses [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     378,068 363,545 363,545
Financing Receivable, Allowance for Credit Loss, Writeoff     (34,492)   (54,953)
Financing Receivable, Allowance for Credit Loss, Recovery     5,981   17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (28,511)   (36,977)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     26,000   51,500
Financing Receivable, Allowance for Credit Loss, Ending Balance 443,729   443,729   378,068
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (34,492)   (54,953)
Financing Receivable, Allowance for Credit Loss, Recovery     5,981   17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (28,511)   (36,977)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     39,512    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     28,263    
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition     397    
Allowance for Loan Losses [Member] | Commercial and Industrial Sector [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     168,636 136,596 136,596
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   (14,615)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,258)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     29,105   38,298
Financing Receivable, Allowance for Credit Loss, Ending Balance 202,295   202,295   168,636
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   (14,615)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,258)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     19,514    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     5,086    
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition     294    
Allowance for Loan Losses [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     11,327 9,417 9,417
Financing Receivable, Allowance for Credit Loss, Writeoff     0   (113)
Financing Receivable, Allowance for Credit Loss, Recovery     0   0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     0   (113)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     (1,887)   2,023
Financing Receivable, Allowance for Credit Loss, Ending Balance 13,154   13,154   11,327
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     0   (113)
Financing Receivable, Allowance for Credit Loss, Recovery     0   0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     0   (113)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     2,516    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     1,198    
Allowance for Loan Losses [Member] | Commercial And Business Lending [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     179,963 146,013 146,013
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   (14,728)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,371)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     27,218   40,321
Financing Receivable, Allowance for Credit Loss, Ending Balance 215,449   215,449   179,963
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   (14,728)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,371)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     22,030    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     6,284    
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition     294    
Allowance for Loan Losses [Member] | Commercial Real Estate Investor Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     58,243 71,547 71,547
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     500   2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,210)   (18,221)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     (10,475)   4,917
Financing Receivable, Allowance for Credit Loss, Ending Balance 64,788   64,788   58,243
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     500   2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,210)   (18,221)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     11,640    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     7,590    
Allowance for Loan Losses [Member] | Construction Loans [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     46,595 51,499 51,499
Financing Receivable, Allowance for Credit Loss, Writeoff     0   0
Financing Receivable, Allowance for Credit Loss, Recovery     4   154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     4   154
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     6,065   (5,058)
Financing Receivable, Allowance for Credit Loss, Ending Balance 59,421   59,421   46,595
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     0   0
Financing Receivable, Allowance for Credit Loss, Recovery     4   154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     4   154
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     3,459    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     3,298    
Allowance for Loan Losses [Member] | Commercial Real Estate Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     104,838 123,046 123,046
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     504   3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,206)   (18,067)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     (4,410)   (141)
Financing Receivable, Allowance for Credit Loss, Ending Balance 124,209   124,209   104,838
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     504   3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,206)   (18,067)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     15,099    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     10,888    
Allowance for Loan Losses [Member] | Commercial Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     284,801 269,060 269,060
Financing Receivable, Allowance for Credit Loss, Writeoff     (23,943)   (35,934)
Financing Receivable, Allowance for Credit Loss, Recovery     1,397   11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (22,546)   (24,438)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     22,808   40,180
Financing Receivable, Allowance for Credit Loss, Ending Balance 339,658   339,658   284,801
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (23,943)   (35,934)
Financing Receivable, Allowance for Credit Loss, Recovery     1,397   11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (22,546)   (24,438)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     37,129    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     17,172    
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition     294    
Allowance for Loan Losses [Member] | Residential Mortgage [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     33,644 32,576 32,576
Financing Receivable, Allowance for Credit Loss, Writeoff     (260)   (1,148)
Financing Receivable, Allowance for Credit Loss, Recovery     211   615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (49)   (533)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     39   1,601
Financing Receivable, Allowance for Credit Loss, Ending Balance 35,452   35,452   33,644
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (260)   (1,148)
Financing Receivable, Allowance for Credit Loss, Recovery     211   615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (49)   (533)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     790    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     1,028    
Allowance for Loan Losses [Member] | Automobile Loan [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     27,470 28,467 28,467
Financing Receivable, Allowance for Credit Loss, Writeoff     (5,838)   (8,752)
Financing Receivable, Allowance for Credit Loss, Recovery     2,487   3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,351)   (5,723)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     2,059   4,726
Financing Receivable, Allowance for Credit Loss, Ending Balance 34,765   34,765   27,470
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (5,838)   (8,752)
Financing Receivable, Allowance for Credit Loss, Recovery     2,487   3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,351)   (5,723)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     1,346    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     7,241    
Allowance for Loan Losses [Member] | Home Equity Line of Credit [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     16,343 16,620 16,620
Financing Receivable, Allowance for Credit Loss, Writeoff     (92)   (416)
Financing Receivable, Allowance for Credit Loss, Recovery     782   999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     690   583
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     (765)   (860)
Financing Receivable, Allowance for Credit Loss, Ending Balance 18,500   18,500   16,343
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (92)   (416)
Financing Receivable, Allowance for Credit Loss, Recovery     782   999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     690   583
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     174    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     2,058    
Allowance for Loan Losses [Member] | Other Consumer [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     15,810 16,823 16,823
Financing Receivable, Allowance for Credit Loss, Writeoff     (4,359)   (8,703)
Financing Receivable, Allowance for Credit Loss, Recovery     1,104   1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,255)   (6,866)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     1,859   5,853
Financing Receivable, Allowance for Credit Loss, Ending Balance 15,354   15,354   15,810
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (4,359)   (8,703)
Financing Receivable, Allowance for Credit Loss, Recovery     1,104   1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,255)   (6,866)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     73    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     764    
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition     103    
Allowance for Loan Losses [Member] | Consumer Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Beginning Balance     93,267 94,486 94,486
Financing Receivable, Allowance for Credit Loss, Writeoff     (10,549)   (19,019)
Financing Receivable, Allowance for Credit Loss, Recovery     4,584   6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (5,965)   (12,539)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     3,192   11,320
Financing Receivable, Allowance for Credit Loss, Ending Balance 104,071   104,071   93,267
Allowance for Credit Losses on Loans [Abstract]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (10,549)   (19,019)
Financing Receivable, Allowance for Credit Loss, Recovery     4,584   6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (5,965)   (12,539)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     2,383    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     11,091    
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition     103    
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     1,871    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     3,597    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     41,276 38,776 38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     4,000   2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 50,744   50,744   41,276
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and Industrial Sector [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     689    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     1,300    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     18,698 14,456 14,456
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     (1,650)   4,242
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 19,037   19,037   18,698
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     21    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     18    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     132 151 151
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     78   (19)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 249   249   132
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial And Business Lending [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     710    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     1,318    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     18,830 14,607 14,607
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     (1,572)   4,223
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 19,286   19,286   18,830
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Investor Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     28    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     102    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     499 578 578
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     281   (79)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 910   910   499
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Construction Loans [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     901    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     2,169    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     17,947 19,591 19,591
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     5,243   (1,644)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 26,260   26,260   17,947
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     929    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     2,271    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     18,446 20,169 20,169
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     5,524   (1,723)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 27,170   27,170   18,446
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     1,639    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     3,589    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     37,276 34,776 34,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     3,952   2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 46,456   46,456   37,276
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home Equity Line of Credit [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     207    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     8    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     2,406 2,465 2,465
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     49   (59)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 2,670   2,670   2,406
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other Consumer [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     25    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     0    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     1,594 1,535 1,535
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     (1)   59
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 1,618   1,618   1,594
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Consumer Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period     232    
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration     8    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance     4,000 4,000 4,000
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)     48   0
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 4,288   4,288   4,000
Allowance for Loans Losses and Unfunded Commitments [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (34,492)   (54,953)
Financing Receivable, Allowance for Credit Loss, Recovery     5,981   17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (28,511)   (36,977)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Provision for Loan, Lease, and Other Losses at Acquisition     397    
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     419,344 402,322 402,322
Financing Receivable, Allowance for Credit Loss, Writeoff     (34,492)   (54,953)
Financing Receivable, Allowance for Credit Loss, Recovery     5,981   17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (28,511)   (36,977)
Provision for Loan, Lease, and Other Losses     30,000   54,000
Balance at end of period $ 494,473   $ 494,473   $ 419,344
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.36%   1.36%   1.35%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 43,109    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     30,134    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and Industrial Sector [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   $ (14,615)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,258)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Provision for Loan, Lease, and Other Losses at Acquisition     294    
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     187,334 151,052 151,052
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   (14,615)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,258)
Provision for Loan, Lease, and Other Losses     27,455   42,540
Balance at end of period $ 221,332   $ 221,332   $ 187,334
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.61%   1.61%   1.59%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 20,814    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     5,775    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     0   $ (113)
Financing Receivable, Allowance for Credit Loss, Recovery     0   0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     0   (113)
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     11,459 9,568 9,568
Financing Receivable, Allowance for Credit Loss, Writeoff     0   (113)
Financing Receivable, Allowance for Credit Loss, Recovery     0   0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     0   (113)
Provision for Loan, Lease, and Other Losses     (1,809)   2,004
Balance at end of period $ 13,403   $ 13,403   $ 11,459
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.85%   0.85%   0.97%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 2,534    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     1,219    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial And Business Lending [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   $ (14,728)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,371)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Provision for Loan, Lease, and Other Losses at Acquisition     294    
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     198,793 160,620 160,620
Financing Receivable, Allowance for Credit Loss, Writeoff     (21,233)   (14,728)
Financing Receivable, Allowance for Credit Loss, Recovery     893   8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (20,340)   (6,371)
Provision for Loan, Lease, and Other Losses     25,646   44,544
Balance at end of period $ 234,735   $ 234,735   $ 198,793
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.53%   1.53%   1.53%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 23,348    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     6,994    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Investor Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   $ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     500   2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,210)   (18,221)
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     58,742 72,125 72,125
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     500   2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,210)   (18,221)
Provision for Loan, Lease, and Other Losses     (10,194)   4,838
Balance at end of period $ 65,698   $ 65,698   $ 58,742
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.01%   1.01%   1.12%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 11,742    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     7,618    
Allowance for Loans Losses and Unfunded Commitments [Member] | Construction Loans [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     0   $ 0
Financing Receivable, Allowance for Credit Loss, Recovery     4   154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     4   154
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     64,542 71,090 71,090
Financing Receivable, Allowance for Credit Loss, Writeoff     0   0
Financing Receivable, Allowance for Credit Loss, Recovery     4   154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     4   154
Provision for Loan, Lease, and Other Losses     11,308   (6,702)
Balance at end of period $ 85,681   $ 85,681   $ 64,542
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 3.37%   3.37%   3.24%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 5,628    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     4,199    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   $ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     504   3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,206)   (18,067)
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     123,284 143,215 143,215
Financing Receivable, Allowance for Credit Loss, Writeoff     (2,710)   (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery     504   3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (2,206)   (18,067)
Provision for Loan, Lease, and Other Losses     1,114   (1,864)
Balance at end of period $ 151,379   $ 151,379   $ 123,284
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.67%   1.67%   1.70%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 17,370    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     11,817    
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (23,943)   $ (35,934)
Financing Receivable, Allowance for Credit Loss, Recovery     1,397   11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (22,546)   (24,438)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Provision for Loan, Lease, and Other Losses at Acquisition     294    
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     322,077 303,835 303,835
Financing Receivable, Allowance for Credit Loss, Writeoff     (23,943)   (35,934)
Financing Receivable, Allowance for Credit Loss, Recovery     1,397   11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (22,546)   (24,438)
Provision for Loan, Lease, and Other Losses     26,760   42,680
Balance at end of period $ 386,114   $ 386,114   $ 322,077
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.58%   1.58%   1.59%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 40,718    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     18,811    
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential Mortgage [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (260)   $ (1,148)
Financing Receivable, Allowance for Credit Loss, Recovery     211   615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (49)   (533)
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     33,644 32,576 32,576
Financing Receivable, Allowance for Credit Loss, Writeoff     (260)   (1,148)
Financing Receivable, Allowance for Credit Loss, Recovery     211   615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (49)   (533)
Provision for Loan, Lease, and Other Losses     39   1,601
Balance at end of period $ 35,452   $ 35,452   $ 33,644
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.52%   0.52%   0.50%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 790    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     1,028    
Allowance for Loans Losses and Unfunded Commitments [Member] | Automobile Loan [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (5,838)   $ (8,752)
Financing Receivable, Allowance for Credit Loss, Recovery     2,487   3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,351)   (5,723)
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     27,470 28,467 28,467
Financing Receivable, Allowance for Credit Loss, Writeoff     (5,838)   (8,752)
Financing Receivable, Allowance for Credit Loss, Recovery     2,487   3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,351)   (5,723)
Provision for Loan, Lease, and Other Losses     2,059   4,726
Balance at end of period $ 34,765   $ 34,765   $ 27,470
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.86%   0.86%   0.88%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 1,346    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     7,241    
Allowance for Loans Losses and Unfunded Commitments [Member] | Home Equity Line of Credit [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (92)   $ (416)
Financing Receivable, Allowance for Credit Loss, Recovery     782   999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     690   583
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     18,749 19,085 19,085
Financing Receivable, Allowance for Credit Loss, Writeoff     (92)   (416)
Financing Receivable, Allowance for Credit Loss, Recovery     782   999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     690   583
Provision for Loan, Lease, and Other Losses     (716)   (919)
Balance at end of period $ 21,170   $ 21,170   $ 18,749
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 2.56%   2.56%   2.63%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 182    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     2,265    
Allowance for Loans Losses and Unfunded Commitments [Member] | Other Consumer [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (4,359)   $ (8,703)
Financing Receivable, Allowance for Credit Loss, Recovery     1,104   1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,255)   (6,866)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Provision for Loan, Lease, and Other Losses at Acquisition     103    
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     17,404 18,358 18,358
Financing Receivable, Allowance for Credit Loss, Writeoff     (4,359)   (8,703)
Financing Receivable, Allowance for Credit Loss, Recovery     1,104   1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (3,255)   (6,866)
Provision for Loan, Lease, and Other Losses     1,858   5,912
Balance at end of period $ 16,972   $ 16,972   $ 17,404
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 4.01%   4.01%   5.39%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 73    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     789    
Allowance for Loans Losses and Unfunded Commitments [Member] | Consumer Portfolio Segment [Member]          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Financing Receivable, Allowance for Credit Loss, Writeoff     (10,549)   $ (19,019)
Financing Receivable, Allowance for Credit Loss, Recovery     4,584   6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (5,965)   (12,539)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]          
Provision for Loan, Lease, and Other Losses at Acquisition     103    
Allowance for Credit Losses on Loans [Abstract]          
Balance at beginning of period     97,267 $ 98,486 98,486
Financing Receivable, Allowance for Credit Loss, Writeoff     (10,549)   (19,019)
Financing Receivable, Allowance for Credit Loss, Recovery     4,584   6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery     (5,965)   (12,539)
Provision for Loan, Lease, and Other Losses     3,240   11,320
Balance at end of period $ 108,359   $ 108,359   $ 97,267
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.90%   0.90%   0.89%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase     $ 2,391    
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan     $ 11,323    
v3.26.1
Loans Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Loans Information [Line Items]          
Interest Receivable $ 181,916   $ 181,916   $ 161,118
Financing Receivable, Accrued Interest, Writeoff 400 $ 500 800 $ 1,100  
Mortgage Loans in Process of Foreclosure, Amount 19,400   19,400   20,100
Loans and Finance Receivables [Member]          
Loans Information [Line Items]          
Interest Receivable $ 135,400   $ 135,400   $ 117,600
v3.26.1
Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Summary of core deposit intangibles and other intangibles          
Amortization of Intangible Assets $ 6,894 $ 2,203 $ 9,096 $ 4,405  
Core Deposits [Member]          
Summary of core deposit intangibles and other intangibles          
Finite-Lived Core Deposits, Gross 88,109   88,109   $ 88,109
Additions during the period     103,200    
Finite-Lived Intangible Assets, Accumulated Amortization (74,356)   (74,356)   (65,260)
Finite-Lived Intangible Assets, Net, Total $ 116,953   116,953   22,849
Amortization of Intangible Assets     $ 9,096   $ 8,811
v3.26.1
Goodwill and Other Intangible Assets, Mortgage Servicing Rights Roll-Forward (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Summary of Changes in MSR [Line Items]    
Servicing Asset at Fair Value, Amount, Beginning Balance $ 86,337 $ 87,683
Servicing Asset at Fair Value, Additions 6,159 8,716
Servicing Asset at Fair Value, Disposals (4,899) (8,621)
Servicing Asset at Fair Value, Other Changes in Fair Value 86 (1,441)
Servicing Asset at Fair Value, Amount, Ending Balance 87,683 86,337
Portfolio Of Residential Mortgage Loans Serviced For Others $ 6,160,254 $ 6,191,012
Mortgage Servicing Rights Net To Servicing Portfolio 1.42% 1.39%
v3.26.1
Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Core Deposits [Member]    
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year $ 13,788  
Finite-Lived Intangible Asset, Expected Amortization, Year One 26,167  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 18,965  
Finite-Lived Intangible Asset, Expected Amortization, Year Three 15,285  
Finite-Lived Intangible Asset, Expected Amortization, Year Four 11,788  
Finite-Lived Intangible Asset, Expected Amortization, Year Five 9,851  
Finite-Lived Intangible Asset, Expected Amortization, after Year Five 21,109  
Finite-Lived Intangible Assets, Net, Total 116,953 $ 22,849
Servicing Contracts [Member]    
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year 4,817  
Finite-Lived Intangible Asset, Expected Amortization, Year One 11,601  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 11,838  
Finite-Lived Intangible Asset, Expected Amortization, Year Three 11,189  
Finite-Lived Intangible Asset, Expected Amortization, Year Four 10,214  
Finite-Lived Intangible Asset, Expected Amortization, Year Five 9,123  
Finite-Lived Intangible Asset, Expected Amortization, after Year Five 28,901  
Finite-Lived Intangible Assets, Net, Total $ 87,683  
v3.26.1
Goodwill and Other Intangible Assets (Details Textuals) - USD ($)
$ in Thousands
 2 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Apr. 01, 2026
Dec. 31, 2025
Goodwill [Line Items]          
Goodwill, Impaired, Facts and Circumstances Leading to Impairment no        
Goodwill, Impairment Loss   $ 0 $ 0    
Goodwill $ 1,147,081 $ 1,147,081   $ 42,100 $ 1,104,992
American National [Member]          
Goodwill [Line Items]          
Goodwill       $ 42,089  
v3.26.1
Short and Long-Term Funding, Composition (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Short-Term Debt [Abstract]    
Federal Funds Purchased $ 473,905 $ 260,070
Securities Sold under Agreements to Repurchase 55,371 47,794
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Total 529,276 307,864
Debt Instrument [Line Items]    
Senior Notes 300,000 300,000
Subordinated Debt 300,000 300,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net (6,895) (7,484)
Long-term Debt 591,080 594,276
TotalShortTermLongTermExcludingFHLB 1,120,356 902,140
Federal Funds Purchased 473,905 260,070
Securities Sold under Agreements to Repurchase 55,371 47,794
Federal Funds Purchased and Securities Sold under Agreements to Repurchase 529,276 307,864
Advance from Federal Home Loan Bank 4,315,000 2,855,250
Long-Term Federal Home Loan Bank Advances 263,115 414,122
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances 4,574,681 3,268,094
Debt, Long-Term and Short-Term, Combined Amount 5,695,037 4,170,234
Short-Term Debt 529,276 307,864
Advance from Federal Home Loan Bank [Abstract]    
Advance from Federal Home Loan Bank 4,315,000 2,855,250
Long-Term Federal Home Loan Bank Advances 263,115 414,122
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances 4,574,681 3,268,094
Debt, Long-Term and Short-Term, Combined Amount 5,695,037 4,170,234
Fair Value Hedging [Member]    
Debt Instrument [Line Items]    
Subordinated Debt (2,025) 1,760
Advance from Federal Home Loan Bank (3,434) (1,278)
Advance from Federal Home Loan Bank [Abstract]    
Advance from Federal Home Loan Bank $ (3,434) $ (1,278)
v3.26.1
Short and Long-Term Funding (Remaining Contractual Maturity of the Securities Sold Under Agreements to Repurchase) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Maturity Overnight and on Demand [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement $ 55,371 $ 47,794
v3.26.1
Short and Long-Term Funding (Long-term Funding Narrative) (Details Textuals) - USD ($)
$ in Thousands
 12 Months Ended 60 Months Ended 61 Months Ended
Mar. 01, 2033
Aug. 29, 2030
Jul. 30, 2030
Aug. 29, 2029
Mar. 01, 2028
Aug. 29, 2024
Feb. 10, 2023
Aug. 28, 2030
Mar. 01, 2033
Aug. 28, 2029
Feb. 29, 2028
Jun. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]                          
Fair Value of Pledged Securites to Securities Sold under Agreements to Repurchase                       202.00%  
Senior Notes                       $ 300,000 $ 300,000
Debt Instrument, Rate Conversion Date       Aug. 29, 2029                  
Debt Instrument, Rate Start Date           Aug. 29, 2024              
Two Thousand Twenty Four Senior Notes                          
Debt Instrument [Line Items]                          
Debt Instrument, Issuance Date Month, Year           August 2024              
Senior Notes           $ 300,000              
Debt Instrument, Maturity Date Month, Year   Aug. 29, 2030                      
Debt Instrument, Redemption     Jul. 30, 2030                    
Interest Added to Compound SOFR, effective floating rate               3.03%          
Debt Instrument, Redemption Period, Start Date       Aug. 29, 2029                  
Debt Instrument, Interest Rate During Period                   6.455%      
Two Thousand Twenty Three Subordinated Notes [Member]                          
Debt Instrument [Line Items]                          
Debt Instrument, Issuance Date Month, Year             February 2023            
Debt Instrument, Maturity Date Month, Year Mar. 01, 2033                        
Debt Instrument, Redemption Period, Start Date         Mar. 01, 2028                
Junior Subordinated Debentures Issued             $ 300,000            
Debt Instrument, Term             10 years            
Subordinated Borrowing, Interest Rate                     6.625%    
Interest Added to UST 5 Year Rate                 2.812%        
v3.26.1
Derivative and Hedging Activities, Derivative Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Derivative Instrument Detail [Abstract]      
Derivative Asset, Notional Amount $ 100,000    
Derivative Liability, Notional Amount 250,000    
Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Subject to Master Netting Arrangement, before Offset 48,451 $ 42,468  
Derivative Liability, Subject to Master Netting Arrangement, before Offset 15,109 23,006  
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset 9,343 12,839  
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset 9,343 12,839  
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset 17,769 10,343  
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset 720 8,334  
Derivative Asset 21,339 19,286  
Derivative Liability 5,046 1,833  
Other Assets [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Subject to Master Netting Arrangement, before Offset 66,355 80,606  
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset 9,343 12,839  
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset 17,769 10,343  
Derivative Asset 39,243 57,424  
Other Liabilities [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset 119,081 110,787  
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset 9,343 12,839  
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset 720 8,334  
Derivative Liability 109,018 89,614  
Designated as Hedging Instrument | Other Assets [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Subject to Master Netting Arrangement, before Offset 2,790 11,274  
Designated as Hedging Instrument | Other Assets [Member] | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Notional Amount 1,150,000 2,425,000  
Designated as Hedging Instrument | Other Assets [Member] | Foreign Exchange Forward [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Notional Amount 48,307 280,159  
Designated as Hedging Instrument | Other Liabilities [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset 7,040 195  
Designated as Hedging Instrument | Other Liabilities [Member] | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Notional Amount 1,650,000 25,000  
Designated as Hedging Instrument | Other Liabilities [Member] | Foreign Exchange Forward [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Notional Amount 269,686 38,384  
Not Designated as Hedging Instrument [Member] | Other Assets [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Subject to Master Netting Arrangement, before Offset 63,565 69,332  
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Notional Amount 5,496,857 4,775,818  
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Foreign Exchange Forward [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Notional Amount 65,014 48,904  
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Lock Commitments [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Notional Amount 68,998 39,998  
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset 112,041 110,592  
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Notional Amount 6,553,249 7,072,274  
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Foreign Exchange Forward [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Notional Amount 13,535 43,787  
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Forward Commitments to Sell Residential Mortgage Loans      
Derivative Instrument Detail [Abstract]      
Derivative Liability, Notional Amount 141,000 107,000  
Fair Value, Inputs, Level 2      
Derivative Instrument Detail [Abstract]      
Derivative Asset, Notional Amount 200    
Derivative Liability, Notional Amount (1,500)    
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset 1,432 814  
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset 1,435 10,517  
Derivative Liability 6,737 1  
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset 61,693 66,787  
Derivative Liability 111,446 108,631  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign Exchange Forward [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset 440 1,731  
Derivative Liability 198 1,517  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest Rate Lock Commitments [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset 0 0  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset 1,435 10,517  
Derivative Liability 6,737 1  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Foreign Exchange Forward [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset 1,355 757  
Derivative Liability 303 194  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member] | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset 61,693 66,787  
Derivative Liability 111,446 108,631  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Derivative Financial Instruments, Assets [Member]      
Derivative Instrument Detail [Abstract]      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs 1,432 814 $ 327
Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis With Unobservable Inputs - Forward Commitments (400) (400)  
Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis With Unobservable Inputs - Interest Rate Lock Commitements 1,400 800  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Interest Rate Lock Commitments [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset 1,432 814  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Designated as Hedging Instrument | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset 0 0  
Derivative Liability 0 0  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Interest Rate Contract      
Derivative Instrument Detail [Abstract]      
Derivative Asset 0 0  
Derivative Liability 0 0  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Asset 1,432 814  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Forward Commitments to Sell Residential Mortgage Loans      
Derivative Instrument Detail [Abstract]      
Derivative Liability $ 397 $ 444  
v3.26.1
Derivative and Hedging Activities Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Liability, Notional Amount $ (250,000)  
Carrying amount excluded for foreign currency loans 318,000 $ 318,500
Derivative Financial Instruments, Liabilities [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Liability, Notional Amount (494,541) (500,482)
Fair Value Hedging [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) 5,459 (482)
Long-Term Debt [Member] | Derivative Financial Instruments, Liabilities [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Liability, Notional Amount (297,975) (301,760)
Long-Term Debt [Member] | Fair Value Hedging [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) 2,025 (1,760)
Federal Home Loan Bank Advances [Member] | Derivative Financial Instruments, Liabilities [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Liability, Notional Amount (196,566) (198,722)
Federal Home Loan Bank Advances [Member] | Fair Value Hedging [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) $ 3,434 $ 1,278
v3.26.1
Derivative and Hedging Activities Income impact of Fair Value and Cash Flow Hedge (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2020
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative Liability Notional Amount, Terminated     $ 500,000    
Interest Income [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Gain (Loss) on Fair Value Hedges Recognized in Earnings $ 565 $ (1,464)   $ 1,169 $ (2,614)
Interest Income [Member] | Fair Value Hedging [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge (31) (27)   (174) (58)
Interest Income [Member] | Designated as Hedging Instrument          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments 597 (1,437)   1,343 (2,555)
Interest Expense          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Gain (Loss) on Fair Value Hedges Recognized in Earnings (380) (1,942)   (777) (4,160)
Interest Expense | Fair Value Hedging [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge 2,952 (4,099)   5,942 (11,096)
Interest Expense | Designated as Hedging Instrument          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments (3,332) 2,158   (6,719) 6,936
Capital Market Fees [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Gain (Loss) on Fair Value Hedges Recognized in Earnings 51 0   53 1
Capital Market Fees [Member] | Fair Value Hedging [Member]          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Increase (Decrease) in Fair Value of Hedged Item in Foreign Currency Fair Value Hedge (13,163) 19,542   (18,086) 20,095
Capital Market Fees [Member] | Designated as Hedging Instrument          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Increase (Decrease) in Fair Value of Foreign Currency Fair Value Hedging Instruments $ 13,214 $ (19,542)   $ 18,139 $ (20,093)
v3.26.1
Derivative and Hedging Activities, Cash Flow Hedge Included in AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Cash Flow Hedge Impacts on AOCI [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax $ (6,506) $ 1,264 $ (14,418) $ 8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax $ (597) $ 1,437 $ (1,343) $ 2,555
v3.26.1
Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Capital Market Fees [Member] | Interest Rate Related Instruments Customer and Mirror [Member]        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (1) $ (42) $ (31) $ (90)
Capital Market Fees [Member] | Foreign Exchange Forward [Member]        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 202 (1,075) 642 (575)
Mortgage Banking [Member] | Interest Rate-Related Instruments - MSRs Hedge        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (420) (308) (219) 1,158
Mortgage Banking [Member] | Interest Rate Lock Commitments [Member]        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 595 933 617 1,594
Mortgage Banking [Member] | Forward Contracts [Member]        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (1,339) $ (779) $ 46 $ (1,616)
v3.26.1
Derivative and Hedging Activities (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2020
Jun. 30, 2026
Sep. 30, 2026
Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Additional Collateral, Aggregate Fair Value   $ 73.8   $ 79.4
Derivative collateral right to reclaim cash   3.5   $ 11.8
Derivative Liability Notional Amount, Terminated $ 500.0      
Underlying Hedged Asset, Amortized Cost Basis   $ 151.4    
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months     $ 3.1  
Maximum Length of Time Hedged in Cash Flow Hedge   41 months    
Designated as Hedging Instrument        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge   $ 0.7    
v3.26.1
Balance Sheet Offsetting (Details) - Interest Rate Contract - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Offsetting Derivative Assets [Abstract]    
Derivative Asset, Subject to Master Netting Arrangement, before Offset $ 48,451 $ 42,468
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset (9,343) (12,839)
Derivative Asset, Collateral, Obligation to Return Cash, Offset (17,769) (10,343)
Derivative Asset 21,339 19,286
Derivative Collateral Obligation to Return Collateral (17,912) (18,131)
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction 3,427 1,155
Offsetting Derivative Liabilities [Abstract]    
Derivative Liability, Subject to Master Netting Arrangement, before Offset 15,109 23,006
Derivative Liability, Fair Value, Gross Asset (9,343) (12,839)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset (720) (8,334)
Derivative Liability 5,046 1,833
Derivative Collateral Right to Reclaim Collateral 0 0
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction $ 5,046 $ 1,833
v3.26.1
Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters, Summary of Lending Related and Other Commitments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Other Commitments [Line Items]          
Lending Related Commitments, Fair Value $ 0   $ 0   $ 0
Loans Repurchased Under Make Whole Requests     2,900   3,500
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount 50,744   50,744   41,276
Investment Program, Proportional Amortization Method, Elected [Line Items]          
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit 10,406 $ 10,772 19,543 $ 20,230  
Commitments to Extend Credit [Member]          
Other Commitments [Line Items]          
Lending Related Commitments 13,006,388   13,006,388   11,872,816
Letter of Credit [Member]          
Other Commitments [Line Items]          
Lending Related Commitments 589   589   425
Standby Letters of Credit [Member]          
Other Commitments [Line Items]          
Lending Related Commitments 252,770   252,770   222,047
Lines of Credit, Fair Value Disclosure 2,400   2,400   $ 2,200
Affordable Housing Projects and Other [Member]          
Other Commitments [Line Items]          
Investment Program, Proportional Amortization Method, Applied, Amortization Expense 8,692 8,369 17,146 17,058  
Investment Program, Proportional Amortization Method, Elected [Line Items]          
Investment Program, Proportional Amortization Method, Applied, Amortization Expense $ 8,692 $ 8,369 $ 17,146 $ 17,058  
v3.26.1
Commitment, Changes in the Allowance for Unfunded Commitments (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]    
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance $ 41,276 $ 38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 4,000 2,500
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration 3,597  
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period 1,871  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance $ 50,744 $ 41,276
v3.26.1
Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Details Textuals) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Jan. 01, 2022
Other Commitments [Line Items]            
Investment Program, Proportional Amortization Method, Elected, Impairment Loss $ 900,000 $ 900,000   $ 900,000    
Loans Repurchased Under Make Whole Requests     $ 2,900,000   $ 3,500,000  
Loans Sold To Outside Investors Loss Reimbursement Settlement Paid         0  
Make Whole Requests, Loan Origination Date, Majority     Jan. 01, 2022      
Loans Sold To Outside Investors Original Amount           $ 4,300,000,000
Loans Sold To Outside Investors Remaining Outstanding Amount 2,000,000,000.0   $ 2,000,000,000.0      
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount 50,744,000   50,744,000   41,276,000  
Financing Receivable, before Allowance for Credit Loss 36,467,040,000   36,467,040,000   31,163,614,000  
Loss on Sale of Investments         0  
Residential Mortgage [Member]            
Other Commitments [Line Items]            
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount 400,000   400,000   300,000  
Residential Mortgage [Member] | Recourse            
Other Commitments [Line Items]            
Financing Receivable, before Allowance for Credit Loss 12,200,000   12,200,000   11,400,000  
Residential Mortgage [Member] | Recourse | Credit Risk            
Other Commitments [Line Items]            
Financing Receivable, before Allowance for Credit Loss 365,800,000   365,800,000   273,400,000  
Loss on Sale of Investments     0      
Affordable Housing Projects and Other [Member]            
Other Commitments [Line Items]            
Other Investments 161,300,000   161,300,000   174,300,000  
Investment Program, Proportional Amortization Method, Applied, Amortization Expense 8,692,000 $ 8,369,000 17,146,000 $ 17,058,000    
Investment, Proportional Amortization Method, Elected, Amount 160,000,000.0   160,000,000.0   172,200,000  
Investment Program, Proportional Amortization Method, Elected, Impairment Loss     900,000      
Investment Program, Proportional Amortization Method, Elected, Commitment 22,500,000   22,500,000   22,800,000  
Loan Pool CRA Investments [Member]            
Other Commitments [Line Items]            
Other Investments $ 74,300,000   $ 74,300,000   $ 62,300,000  
v3.26.1
Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Assets, Fair Value Disclosure [Abstract]      
Cash and Due from Banks $ 548,057 $ 574,698  
Interest-bearing Deposits in Banks and Other Financial Institutions 1,268,379 1,144,123  
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure 14,355 1,400  
Debt Securities, Available-for-Sale 6,366,586 5,397,563  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 3,510,775 3,602,576  
Debt Securities, Held-to-Maturity, Fair Value 3,091,818 3,190,994  
Equity Securities, FV-NI and without Readily Determinable Fair Value 29,960 26,060  
FHLB and Federal Reserve Bank stocks 329,436 252,514  
Loans and Leases Receivable, Net Amount 36,023,311 30,785,546  
Life Insurance, Corporate or Bank Owned, Amount 717,116 694,452  
Assets 51,812,506 45,202,596  
Liabilities, Fair Value Disclosure      
Noninterest-bearing Domestic Deposit, Demand 6,908,338 6,126,632  
Deposits 39,931,255 35,552,608  
Federal Funds Purchased and Securities Sold under Agreements to Repurchase 529,276 307,864  
Short-Term Debt 529,276 307,864  
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances 4,574,681 3,268,094  
Other Long-Term Debt 591,080 594,276  
Liabilities 46,174,383 40,227,249  
Standby Letters of Credit [Member]      
Liabilities, Fair Value Disclosure      
Lending Related Commitments 252,800 222,000  
Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 21,339 19,286  
Liabilities, Fair Value Disclosure      
Derivative Liability 5,046 1,833  
Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Cash and Due from Banks 548,057 574,698  
Interest-bearing Deposits in Banks and Other Financial Institutions 1,268,379 1,144,123  
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure 14,355 1,400  
Equity Securities, FV-NI 14,960 11,060  
Equity Securities, FV-NI and without Readily Determinable Fair Value 29,960 26,060  
FHLB and Federal Reserve Bank stocks 329,436 252,514  
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure 94,490 72,499  
Loan, Held-for-Sale, Fair Value Disclosure 15,000    
Loans and Leases Receivable, Net Amount 35,976,291 30,766,886  
Loans Receivable, Fair Value Disclosure 35,021,793 29,970,788  
Life Insurance, Corporate or Bank Owned, Amount 717,116 694,452  
Servicing Asset 87,683 86,337  
Assets 49,024,483 42,699,714  
Assets, Fair Value Disclosure 47,651,028 41,492,034  
Liabilities, Fair Value Disclosure      
Brokered CDs, Carrying Amount 3,933,787 3,795,133  
Brokered CDs, Fair Value 3,923,505 3,791,245  
Time Deposits, at Carrying Value 4,782,343 4,041,178  
Time Deposits 4,771,175 4,035,549  
Federal Funds Purchased and Securities Sold under Agreements to Repurchase 529,276 307,864  
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure 529,276 307,864  
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances 4,574,681 3,268,094  
Federal Home Loan Bank Borrowings, Fair Value Disclosure 4,568,111 3,267,836  
Other Long-Term Debt 591,080 594,276  
Long-term Debt, Fair Value 589,506 598,141  
Long-Term Line of Credit 2,365 2,225  
Liabilities 14,532,613 12,119,557  
Liabilities, Fair Value Disclosure 14,503,019 12,113,647  
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 1,432 814  
Fair Value, Measurements, Recurring | Commitments [Member]      
Liabilities, Fair Value Disclosure      
Derivative Liability 397 444  
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 1,435 10,517  
Liabilities, Fair Value Disclosure      
Derivative Liability 6,737 1  
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Foreign Currency Contract, Asset, Fair Value Disclosure 1,355 757  
Liabilities, Fair Value Disclosure      
Foreign Currency Contracts, Liability, Fair Value Disclosure 303 194  
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 61,693 66,787  
Liabilities, Fair Value Disclosure      
Derivative Liability 111,446 108,631  
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Foreign Currency Contract, Asset, Fair Value Disclosure 440 1,731  
Liabilities, Fair Value Disclosure      
Foreign Currency Contracts, Liability, Fair Value Disclosure 198 1,517  
US Treasury Securities      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 997 996  
Debt Securities, Held-to-Maturity, Fair Value 1,002 1,015  
US Treasury Securities | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 997 996  
Debt Securities, Held-to-Maturity, Fair Value 1,002 1,015  
US States and Political Subdivisions Debt Securities [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 7,240 3,044  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 1,591,681 1,628,088  
Debt Securities, Held-to-Maturity, Fair Value 1,468,604 1,507,302  
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 7,240 3,044  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 1,591,681 1,628,088  
Debt Securities, Held-to-Maturity, Fair Value 1,468,604 1,507,302  
Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 137,288 129,863  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 790,729 823,630  
Debt Securities, Held-to-Maturity, Fair Value 660,737 696,462  
Residential Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 5,491,648 5,039,829  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 37,215 39,123  
Debt Securities, Held-to-Maturity, Fair Value 34,626 36,884  
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 137,288 129,863  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 790,729 823,630  
Debt Securities, Held-to-Maturity, Fair Value 660,737 696,462  
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 5,491,648 5,039,829  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 37,215 39,123  
Debt Securities, Held-to-Maturity, Fair Value 34,626 36,884  
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 292,007 302,817  
Debt Securities, Held-to-Maturity, Fair Value 246,460 258,827  
Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 410,221 16,958  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 757,723 763,370  
Debt Securities, Held-to-Maturity, Fair Value 644,300 650,366  
Commercial Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 106,844 109,556  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 40,423 44,552  
Debt Securities, Held-to-Maturity, Fair Value 36,089 40,138  
Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 410,221 16,958  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 757,723 763,370  
Debt Securities, Held-to-Maturity, Fair Value 644,300 650,366  
Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 106,844 109,556  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 40,423 44,552  
Debt Securities, Held-to-Maturity, Fair Value 36,089 40,138  
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 88,212 95,046  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 0    
Debt Securities, Held-to-Maturity, Fair Value 0    
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 88,212 95,046  
US Government-sponsored Enterprises Debt Securities [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 120,070 269  
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 0    
Debt Securities, Held-to-Maturity, Fair Value 0    
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 120,070 269  
Other Debt Obligations | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 5,063 2,998  
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 6,366,586 5,397,563  
Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 3,510,775 3,602,576  
Debt Securities, Held-to-Maturity, Fair Value 3,091,818 3,190,994  
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Cash and Due from Banks 548,057 574,698  
Interest-bearing Deposits in Banks and Other Financial Institutions 1,268,379 1,144,123  
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure 14,355 1,400  
Equity Securities, FV-NI 14,960 11,060  
FHLB and Federal Reserve Bank stocks 0 0  
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure 0 0  
Loan, Held-for-Sale, Fair Value Disclosure 0    
Loans Receivable, Fair Value Disclosure 0 0  
Life Insurance, Corporate or Bank Owned, Amount 0 0  
Servicing Asset 0 0  
Assets, Fair Value Disclosure 1,846,753 1,732,296  
Liabilities, Fair Value Disclosure      
Brokered CDs, Fair Value 0 0  
Time Deposits 0 0  
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure 529,276 307,864  
Federal Home Loan Bank Borrowings, Fair Value Disclosure 0 0  
Long-term Debt, Fair Value 0 0  
Long-Term Line of Credit 0 0  
Liabilities, Fair Value Disclosure 529,276 307,864  
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 0 0  
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Commitments [Member]      
Liabilities, Fair Value Disclosure      
Derivative Liability 0 0  
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 0 0  
Liabilities, Fair Value Disclosure      
Derivative Liability 0 0  
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Foreign Currency Contract, Asset, Fair Value Disclosure 0 0  
Liabilities, Fair Value Disclosure      
Foreign Currency Contracts, Liability, Fair Value Disclosure 0 0  
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 0 0  
Liabilities, Fair Value Disclosure      
Derivative Liability 0 0  
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Foreign Currency Contract, Asset, Fair Value Disclosure 0 0  
Liabilities, Fair Value Disclosure      
Foreign Currency Contracts, Liability, Fair Value Disclosure 0 0  
Fair Value, Inputs, Level 1 | US Treasury Securities | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 1,002 1,015  
Fair Value, Inputs, Level 1 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 1 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 1 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 1 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Fair Value, Inputs, Level 1 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Fair Value, Inputs, Level 1 | Other Debt Obligations | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Fair Value, Inputs, Level 1 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Fair Value, Inputs, Level 1 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 1,002 1,015  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Cash and Due from Banks 0 0  
Interest-bearing Deposits in Banks and Other Financial Institutions 0 0  
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure 0 0  
Equity Securities, FV-NI 0 0  
FHLB and Federal Reserve Bank stocks 329,436 252,514  
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure 94,490 72,499  
Loan, Held-for-Sale, Fair Value Disclosure 15,000    
Loans Receivable, Fair Value Disclosure 0 0  
Life Insurance, Corporate or Bank Owned, Amount 717,116 694,452  
Servicing Asset 0 0  
Assets, Fair Value Disclosure 10,676,304 9,686,799  
Liabilities, Fair Value Disclosure      
Brokered CDs, Fair Value 3,923,505 3,791,245  
Time Deposits 4,771,175 4,035,549  
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure 0 0  
Federal Home Loan Bank Borrowings, Fair Value Disclosure 4,568,111 3,267,836  
Long-term Debt, Fair Value 589,506 598,141  
Long-Term Line of Credit 2,365 2,225  
Liabilities, Fair Value Disclosure 13,973,346 11,805,339  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 440 1,731  
Liabilities, Fair Value Disclosure      
Derivative Liability 198 1,517  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 0 0  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Commitments [Member]      
Liabilities, Fair Value Disclosure      
Derivative Liability 0 0  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 1,435 10,517  
Liabilities, Fair Value Disclosure      
Derivative Liability 6,737 1  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 1,355 757  
Foreign Currency Contract, Asset, Fair Value Disclosure 1,355 757  
Liabilities, Fair Value Disclosure      
Derivative Liability 303 194  
Foreign Currency Contracts, Liability, Fair Value Disclosure 303 194  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 61,693 66,787  
Liabilities, Fair Value Disclosure      
Derivative Liability 111,446 108,631  
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Foreign Currency Contract, Asset, Fair Value Disclosure 440 1,731  
Liabilities, Fair Value Disclosure      
Foreign Currency Contracts, Liability, Fair Value Disclosure 198 1,517  
Fair Value, Inputs, Level 2 | US Treasury Securities | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 7,240 3,044  
Debt Securities, Held-to-Maturity, Fair Value 1,468,604 1,507,302  
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 137,288 129,863  
Debt Securities, Held-to-Maturity, Fair Value 660,737 696,462  
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 5,491,648 5,039,829  
Debt Securities, Held-to-Maturity, Fair Value 34,626 36,884  
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 246,460 258,827  
Fair Value, Inputs, Level 2 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 410,221 16,958  
Debt Securities, Held-to-Maturity, Fair Value 644,300 650,366  
Fair Value, Inputs, Level 2 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 106,844 109,556  
Debt Securities, Held-to-Maturity, Fair Value 36,089 40,138  
Fair Value, Inputs, Level 2 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 88,212 95,046  
Fair Value, Inputs, Level 2 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 120,070 269  
Fair Value, Inputs, Level 2 | Other Debt Obligations | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 3,000 2,998  
Fair Value, Inputs, Level 2 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 6,364,523 5,397,563  
Fair Value, Inputs, Level 2 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 3,090,816 3,189,979  
Fair Value, Inputs, Level 3      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 2,100    
Equity Securities, FV-NI   0 $ 72
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Cash and Due from Banks 0 0  
Interest-bearing Deposits in Banks and Other Financial Institutions 0 0  
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure 0 0  
Equity Securities, FV-NI 0 0  
FHLB and Federal Reserve Bank stocks 0 0  
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure 0 0  
Loan, Held-for-Sale, Fair Value Disclosure 0    
Loans Receivable, Fair Value Disclosure 35,021,793 29,970,788  
Life Insurance, Corporate or Bank Owned, Amount 0 0  
Servicing Asset 87,683 86,337  
Assets, Fair Value Disclosure 35,112,971 30,057,939  
Liabilities, Fair Value Disclosure      
Brokered CDs, Fair Value 0 0  
Time Deposits 0 0  
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure 0 0  
Federal Home Loan Bank Borrowings, Fair Value Disclosure 0 0  
Long-term Debt, Fair Value 0 0  
Long-Term Line of Credit 0 0  
Liabilities, Fair Value Disclosure 397 444  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 1,432 814  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Commitments [Member]      
Liabilities, Fair Value Disclosure      
Derivative Liability 397 444  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 0 0  
Liabilities, Fair Value Disclosure      
Derivative Liability 0 0  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Foreign Currency Contract, Asset, Fair Value Disclosure 0 0  
Liabilities, Fair Value Disclosure      
Foreign Currency Contracts, Liability, Fair Value Disclosure 0 0  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 0 0  
Liabilities, Fair Value Disclosure      
Derivative Liability 0 0  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]      
Assets, Fair Value Disclosure [Abstract]      
Foreign Currency Contract, Asset, Fair Value Disclosure 0 0  
Liabilities, Fair Value Disclosure      
Foreign Currency Contracts, Liability, Fair Value Disclosure 0 0  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]      
Assets, Fair Value Disclosure [Abstract]      
Derivative Asset 1,432 814  
Fair Value, Inputs, Level 3 | US Treasury Securities | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 3 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 3 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 3 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, Level 3 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Fair Value, Inputs, Level 3 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 0 0  
Fair Value, Inputs, Level 3 | Other Debt Obligations | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 2,063 0  
Fair Value, Inputs, Level 3 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Available-for-Sale 2,063 0  
Fair Value, Inputs, Level 3 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Debt Securities, Held-to-Maturity, Fair Value 0 0  
Fair Value, Inputs, NAV [Member] | Fair Value, Measurements, Recurring      
Assets, Fair Value Disclosure [Abstract]      
Equity Securities, FV-NI $ 15,000 $ 15,000  
v3.26.1
Fair Value Measurements Financial Instruments Classified Within Level 3 (Details) - Fair Value, Inputs, Level 3 - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Equity Securities without Readily Determinable Fair Value [Line Items]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net   $ (63)
Fair Value, Measurements, Recurring | Derivative Financial Instruments, Assets [Member]    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Beginning Balance $ 814 327
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases 7,629 13,435
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements (6,308) (13,690)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings (703) 742
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) 618 487
Ending Balance 1,432 814
Fair Value, Measurements, Recurring | Derivative Financial Instruments, Liabilities [Member]    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Beginning Balance 444 (254)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases (2,240) (3,998)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements 2,910 2,738
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings (717) 1,958
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) (47) 698
Ending Balance $ 397 $ 444
v3.26.1
Fair Value Measurements Equity Securities Roll Forward (Details) - Fair Value, Inputs, Level 3 - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Equity Securities without Readily Determinable Fair Value [Line Items]    
Equity Securities, FV-NI $ 0 $ 72
Payments to Acquire Equity Securities, FV-NI 14  
Proceeds from Sale of Equity Securities, FV-NI $ 23  
v3.26.1
Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other Real Estate $ 1,397 $ 770
Fair Value, Inputs, Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financing Receivable, Individually Evaluated for Impairment $ 48,296 $ 18,659
v3.26.1
Fair Value Measurements Fair Value Unobservable Level 3 Measurements (Details) - Fair Value, Inputs, Level 3 - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Derivative Financial Instruments, Assets [Member] | Fair Value, Measurements, Recurring      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis With Unobservable Inputs - Interest Rate Lock Commitements $ 1,400 $ 800  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs 1,432 814 $ 327
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases 7,629 13,435  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements (6,308) (13,690)  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings (703) 742  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) 618 487  
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs 397 444 $ (254)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases (2,240) (3,998)  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements 2,910 2,738  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings (717) 1,958  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) $ (47) $ 698  
Discounted Cash Flow | Servicing Contracts [Member] | Minimum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate 5.00%    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed 0.00%    
Discounted Cash Flow | Servicing Contracts [Member] | Maximum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate 8.00%    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed 100.00%    
Discounted Cash Flow | Servicing Contracts [Member] | Weighted Average [Member]      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate 5.00%    
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed 8.00%    
Discounted Cash Flow | Impaired Finance Receivable [Member] | Minimum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor 45.00%    
Discounted Cash Flow | Impaired Finance Receivable [Member] | Maximum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor 45.00%    
Discounted Cash Flow | Impaired Finance Receivable [Member] | Weighted Average [Member]      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor 45.00%    
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | Minimum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Interest Rate Lock Commitments, Closing Ratio 70.00%    
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | Maximum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Interest Rate Lock Commitments, Closing Ratio 100.00%    
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | Weighted Average [Member]      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Interest Rate Lock Commitments, Closing Ratio 92.00%    
Valuation, Market Approach | Impaired Finance Receivable [Member] | Minimum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor 44.00%    
Valuation, Market Approach | Impaired Finance Receivable [Member] | Maximum      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor 80.00%    
Valuation, Market Approach | Impaired Finance Receivable [Member] | Weighted Average [Member]      
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]      
Assumption for Fair Value of Financing Receivable, Individually Evaluated for Credit Loss, Discount factor 53.00%    
v3.26.1
Retirement Plans, Components of Net Periodic Benefit Cost for the Pension and Postretirement Tables (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension Plan [Member]        
Net period benefit cost for the pension and postretirement plans        
Defined Benefit Plan, Service Cost $ 869 $ 810 $ 1,737 $ 1,619
Defined Benefit Plan, Interest Cost 2,749 2,814 5,499 5,628
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (9,772) (9,809) (19,544) (19,619)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (44) (44) (89) (89)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total (6,198) (6,230) (12,397) (12,460)
Other Postretirement Benefits Plan [Member]        
Net period benefit cost for the pension and postretirement plans        
Defined Benefit Plan, Interest Cost 22 26 43 53
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (19) (19) (38) (38)
Defined Benefit Plan, Amortization of Gain (Loss) 0 4 0 8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total $ 3 $ 12 $ 6 $ 23
v3.26.1
Retirement Plans (Details Textuals) (Details) - Pension Plan [Member] - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Description The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet participation requirements. The benefit allocations are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. As part of acquisition-related integration activities, employees who become eligible for participation in the RAP are generally provided service credit for their employment with the acquired institution for eligibility and vesting purposes.  
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 0 $ 0
v3.26.1
Segment Reporting (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Apr. 01, 2026
Dec. 31, 2025
Segment Income Statement Data Abstract                
Interest Income (Expense), Operating $ 370,039   $ 300,000   $ 677,228 $ 585,940    
Noninterest Income 80,398   66,977   156,256 125,754    
Provision for Loan, Lease, and Other Losses 19,388   17,996   30,389 30,999    
Noninterest Expense 271,882   209,352   491,045 419,971    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total 159,167   139,629   312,050 260,724    
Income Tax Expense (Benefit) 35,603   28,399   68,850 47,808    
Net Income (Loss) Attributable to Parent, Total 123,564 $ 119,635 111,230 $ 101,687 243,200 212,916    
Goodwill 1,147,081       1,147,081   $ 42,100 $ 1,104,992
Interest Income (Expense), after Provision for Loan Loss 350,651   282,004   646,839 554,941    
Labor and Related Expense 161,168   126,994   296,341 250,890    
Information Technology and Data Processing 32,867   26,508   62,603 53,646    
Occupancy, Net 14,091   12,644   27,817 28,025    
Marketing and Advertising Expense 8,548   7,748   16,374 14,134    
Equipment Expense 5,423   4,494   11,033 9,021    
Professional Fees 17,454   6,674   24,176 12,757    
Federal Deposit Insurance Corporation Premium Expense 10,595   9,708   19,432 20,144    
Amortization of Intangible Assets 6,894   2,203   9,096 4,405    
Other Noninterest Expense 13,290   9,674   20,914 21,648    
Commercial and business lending 36,467,040       36,467,040     31,163,614
Assets 51,812,506       51,812,506     $ 45,202,596
Gain (Loss) on Sale of Mortgage Loans 0   0   0 (6,976)    
Corporate and Commercial Specialty [Member]                
Segment Income Statement Data Abstract                
A portion of total depreciation Technology expense 200   100   300 100    
Community, Consumer and Business [Member]                
Segment Income Statement Data Abstract                
A portion of total depreciation Occupancy expense 6,300   5,900   12,500 11,800    
Risk Management and Shared Services [Member]                
Segment Income Statement Data Abstract                
A portion of total depreciation Equipment expense 6,000   6,000   11,900 14,000    
Operating Segments                
Segment Income Statement Data Abstract                
Interest Income (Expense), Operating 370,039   300,000   677,228 585,940    
Net intersegment interest income (expense) 0   0   0 0    
Segment net interest income 370,039   300,000   677,228 585,940    
Noninterest Income 80,398   66,977   156,256 125,754    
Provision for Loan, Lease, and Other Losses 19,388   17,996   30,389 30,999    
Noninterest Expense 271,882   209,352   491,045 419,971    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total 159,167   139,629   312,050 260,724    
Income Tax Expense (Benefit) 35,603   28,399   68,850 47,808    
Net Income (Loss) Attributable to Parent, Total 123,564   111,230   243,200 212,916    
Goodwill 1,147,081   1,104,992   1,147,081 1,104,992    
Interest Income (Expense), before Provision 450,437   366,977   833,484 711,694    
Interest Income (Expense), after Provision for Loan Loss 431,049   348,981   803,095 680,695    
Labor and Related Expense 161,168   126,994   296,341 250,890    
Information Technology and Data Processing 32,867   26,508   62,603 53,646    
Occupancy, Net 14,091   12,644   27,817 28,025    
Marketing and Advertising Expense 8,548   7,748   16,374 14,134    
Equipment Expense 5,423   4,494   11,033 9,021    
Professional Fees 17,454   6,674   24,176 12,757    
Payments of Financing Costs 1,552   2,705   3,259 5,299    
Federal Deposit Insurance Corporation Premium Expense 10,595   9,708   19,432 20,144    
Amortization of Intangible Assets 6,894   2,203   9,096 4,405    
Other Noninterest Expense 13,290   9,674   20,914 21,648    
Allocated indirect expense 0   0   0 0    
Commercial and business lending 36,467,040   30,607,605   36,467,040 30,607,605    
Assets 51,812,506   43,993,729   51,812,506 43,993,729    
Operating Segments | Corporate and Commercial Specialty [Member]                
Segment Income Statement Data Abstract                
Interest Income (Expense), Operating 267,324   242,978   498,429 470,263    
Net intersegment interest income (expense) (105,641)   (107,337)   (208,353) (203,557)    
Segment net interest income 161,683   135,641   290,076 266,706    
Noninterest Income 15,648   11,984   29,540 24,887    
Provision for Loan, Lease, and Other Losses 21,287   20,369   41,947 39,382    
Noninterest Expense 58,400   56,021   108,131 112,155    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total 97,644   71,236   169,538 140,056    
Income Tax Expense (Benefit) 17,567   13,211   30,825 25,997    
Net Income (Loss) Attributable to Parent, Total 80,077   58,025   138,713 114,059    
Goodwill 556,343   525,836   556,343 525,836    
Interest Income (Expense), before Provision 177,331   147,625   319,616 291,593    
Interest Income (Expense), after Provision for Loan Loss 156,044   127,256   277,669 252,211    
Labor and Related Expense 24,595   20,149   48,145 41,475    
Information Technology and Data Processing 1,293   842   2,116 1,432    
Occupancy, Net 255   190   473 336    
Marketing and Advertising Expense 1,128   1,252   2,097 2,186    
Equipment Expense 6   6   12 12    
Professional Fees 272   221   529 422    
Payments of Financing Costs 233   261   721 1,071    
Federal Deposit Insurance Corporation Premium Expense 0   0   0 0    
Amortization of Intangible Assets 0   0   0 0    
Other Noninterest Expense 1,087   934   1,808 1,714    
Allocated indirect expense 29,531   32,166   52,230 63,505    
Commercial and business lending 21,736,674   17,617,892   21,736,674 17,617,892    
Assets 22,552,085   17,907,721   22,552,085 17,907,721    
Operating Segments | Community, Consumer and Business [Member]                
Segment Income Statement Data Abstract                
Interest Income (Expense), Operating 86,481   68,871   154,917 131,367    
Net intersegment interest income (expense) 136,046   143,478   266,076 288,856    
Segment net interest income 222,527   212,349   420,993 420,223    
Noninterest Income 56,437   51,481   112,380 100,560    
Provision for Loan, Lease, and Other Losses 6,456   6,363   13,391 12,434    
Noninterest Expense 174,545   153,331   330,630 307,816    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total 97,963   104,137   189,352 200,533    
Income Tax Expense (Benefit) 20,676   21,869   39,868 42,112    
Net Income (Loss) Attributable to Parent, Total 77,287   82,268   149,484 158,421    
Goodwill 590,738   579,156   590,738 579,156    
Interest Income (Expense), before Provision 278,964   263,830   533,373 520,783    
Interest Income (Expense), after Provision for Loan Loss 272,508   257,467   519,982 508,349    
Labor and Related Expense 65,456   56,641   130,410 116,513    
Information Technology and Data Processing 13,853   12,903   27,978 25,947    
Occupancy, Net 8,405   7,386   16,756 15,820    
Marketing and Advertising Expense 839   968   1,527 1,805    
Equipment Expense 2,319   2,301   4,395 4,331    
Professional Fees 1,478   529   2,160 1,343    
Payments of Financing Costs 1,296   1,171   2,236 2,516    
Federal Deposit Insurance Corporation Premium Expense 0   0   0 0    
Amortization of Intangible Assets 0   0   0 0    
Other Noninterest Expense 10,376   8,024   18,058 15,427    
Allocated indirect expense 70,523   63,408   127,110 124,114    
Commercial and business lending 14,231,238   12,531,178   14,231,238 12,531,178    
Assets 15,452,018   13,043,969   15,452,018 13,043,969    
Operating Segments | Risk Management and Shared Services [Member]                
Segment Income Statement Data Abstract                
Interest Income (Expense), Operating 16,234   (11,849)   23,882 (15,690)    
Net intersegment interest income (expense) (30,405)   (36,141)   (57,723) (85,299)    
Segment net interest income (14,171)   (47,990)   (33,841) (100,989)    
Noninterest Income 8,313   3,512   14,336 307    
Provision for Loan, Lease, and Other Losses (8,355)   (8,736)   (24,949) (20,817)    
Noninterest Expense 38,937   0   52,284 0    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total (36,440)   (35,744)   (46,840) (79,865)    
Income Tax Expense (Benefit) (2,640)   (6,681)   (1,843) (20,301)    
Net Income (Loss) Attributable to Parent, Total (33,800)   (29,063)   (44,997) (59,564)    
Goodwill 0   0   0 0    
Interest Income (Expense), before Provision (5,858)   (44,478)   (19,505) (100,682)    
Interest Income (Expense), after Provision for Loan Loss 2,497   (35,742)   5,444 (79,865)    
Labor and Related Expense 71,117   50,204   117,786 92,902    
Information Technology and Data Processing 17,721   12,763   32,509 26,267    
Occupancy, Net 5,431   5,068   10,588 11,869    
Marketing and Advertising Expense 6,581   5,528   12,750 10,143    
Equipment Expense 3,098   2,187   6,626 4,678    
Professional Fees 15,704   5,924   21,487 10,992    
Payments of Financing Costs 23   1,273   302 1,712    
Federal Deposit Insurance Corporation Premium Expense 10,595   9,708   19,432 20,144    
Amortization of Intangible Assets 6,894   2,203   9,096 4,405    
Other Noninterest Expense 1,827   716   1,048 4,507    
Allocated indirect expense (100,054)   (95,574)   (179,340) (187,619)    
Commercial and business lending 499,128   458,535   499,128 458,535    
Assets $ 13,808,403   $ 13,042,039   $ 13,808,403 $ 13,042,039    
v3.26.1
Segment Reporting (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Risk Management and Shared Services [Member]        
Segment Reporting Information [Line Items]        
A portion of total depreciation Equipment expense $ 6.0 $ 6.0 $ 11.9 $ 14.0
Corporate and Commercial Specialty [Member]        
Segment Reporting Information [Line Items]        
A portion of total depreciation Technology expense 0.2 0.1 0.3 0.1
Community, Consumer and Business [Member]        
Segment Reporting Information [Line Items]        
A portion of total depreciation Occupancy expense $ 6.3 $ 5.9 $ 12.5 $ 11.8
v3.26.1
Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning Balance   $ (7,566)     $ (7,566)  
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities $ (1,901)   $ (2,059)   (3,590) $ (3,986)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (6,506)   1,264   (14,418) 8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (597)   1,437   (1,343) 2,555
Labor and Related Expense 161,168   126,994   296,341 250,890
Other Comprehensive Income (Loss), Net of Tax (35,088) (36,939) 20,847 $ 39,272 (72,027) 60,119
Ending Balance (79,593)       (79,593)  
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning Balance (28,608) (2,456) (23,655) (48,993) (2,456) (48,993)
Other Comprehensive Income (Loss), before Reclassifications, before Tax (36,846)   21,317   (73,377) 53,149
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities 1,901   2,059   3,590 3,986
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax 0   0   0 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 0   0   0 0
Labor and Related Expense 0   0   0 0
Other Expenses     0     0
Other Comprehensive Income (Loss), Tax 8,717   (5,830)   17,407 (14,251)
Other Comprehensive Income (Loss), Net of Tax (26,228)   17,545   (52,380) 42,884
Ending Balance (54,836) (28,608) (6,109) (23,655) (54,836) (6,109)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning Balance 2,153 12,894 9,135 (1,268) 12,894 (1,268)
Other Comprehensive Income (Loss), before Reclassifications, before Tax 0   0   0 0
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities 0   0   0 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (6,506)   1,264   (14,418) 8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (597)   1,437   (1,343) 2,555
Labor and Related Expense 0   0   0 0
Other Expenses     0     0
Other Comprehensive Income (Loss), Tax (1,709)   650   (3,792) 2,668
Other Comprehensive Income (Loss), Net of Tax (8,812)   3,352   (19,553) 13,755
Ending Balance (6,659) 2,153 12,487 9,135 (6,659) 12,487
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning Balance (18,050) (18,003) (20,624) (24,154) (18,003) (24,154)
Other Comprehensive Income (Loss), before Reclassifications, before Tax 0   0   0 4,770
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities 0   0   0 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax 0   0   0 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 0   0   0 0
Labor and Related Expense 63   63   126 126
Other Expenses     (4)     (8)
Other Comprehensive Income (Loss), Tax 15   17   31 (1,157)
Other Comprehensive Income (Loss), Net of Tax (48)   (50)   (95) 3,480
Ending Balance (18,098) (18,050) (20,674) (20,624) (18,098) (20,674)
AOCI Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning Balance (44,505) (7,566) (35,144) (74,416) (7,566) (74,416)
Other Comprehensive Income (Loss), before Reclassifications, before Tax (36,846)   21,317   (73,377) 57,919
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities 1,901   2,059   3,590 3,986
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (6,506)   1,264   (14,418) 8,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (597)   1,437   (1,343) 2,555
Labor and Related Expense 63   63   126 126
Other Expenses     (4)     (8)
Other Comprehensive Income (Loss), Tax 7,023   (5,164)   13,647 (12,740)
Other Comprehensive Income (Loss), Net of Tax (35,088) (36,939) 20,847 39,272 (72,027) 60,119
Ending Balance $ (79,593) $ (44,505) $ (14,297) $ (35,144) $ (79,593) $ (14,297)
v3.26.1
Subsequent Events (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Business Combination, Recognized Liability Assumed, Liability [Abstract]    
Deposits $ 39,931,255 $ 35,552,608
Business Combination, Recognized Asset Acquired, Asset [Abstract]    
Assets $ 51,812,506 $ 45,202,596
v3.26.1
Label Element Value
Common Stock [Member]  
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued 22,975,382
BusinessAcquisitionEquityInterestIssuedOrIssuableExchangeRatio asb_BusinessAcquisitionEquityInterestIssuedOrIssuableExchangeRatio $ 36.25
Share Price us-gaap_SharePrice $ 25.86