v3.26.3
Disclosures About Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financial assets:    
Securities held-to-maturity $ 518,383 $ 605,929
Accrued interest receivable 59,783 56,291
Derivative assets, netting adjustments (32,155) (13,431)
Financial liabilities:    
Borrowed funds, netting adjustments (32,100) (1,900)
Subordinated debt 0 114,800
Junior subordinated debentures 130,288 130,093
Borrowed funds and derivative liabilities, netting adjustments (32,155) (13,431)
Recurring    
Financial assets:    
Securities available-for-sale 203,793 178,261
Derivative assets, netting adjustments (32,155) (13,431)
Total financial assets 1,753,797 1,598,873
Financial liabilities:    
Derivative liabilities, netting adjustments (55) (11,531)
Not Hedging    
Financial assets:    
Derivative assets 34,384 25,922
Financial liabilities:    
Derivative liabilities 34,102 26,673
Interest rate lock commitments | Recurring    
Financial assets:    
Derivative assets 444 617
Forward commitments | Recurring    
Financial assets:    
Derivative assets 6 95
Foreign exchange swaps | Recurring    
Financial assets:    
Derivative assets   4
Interest rate swaps | Hedging    
Financial assets:    
Derivative assets, netting adjustments   (51)
Financial liabilities:    
Derivative liabilities, netting adjustments 0 (1,280)
Interest rate swaps | Hedging | Recurring    
Financial assets:    
Derivative assets   0
Derivative assets, netting adjustments   (51)
Financial liabilities:    
Derivative liabilities 134 0
Derivative liabilities, netting adjustments 0 (1,280)
Interest rate swaps | Not Hedging    
Financial assets:    
Derivative assets, netting adjustments (32,155) (13,380)
Financial liabilities:    
Derivative liabilities, netting adjustments (55) (10,251)
Interest rate swaps | Not Hedging | Recurring    
Financial assets:    
Derivative assets 1,779 11,775
Derivative assets, netting adjustments (32,155) (13,380)
Financial liabilities:    
Derivative liabilities 33,880 15,115
Derivative liabilities, netting adjustments (55) (10,251)
Risk participation agreements | Recurring    
Financial liabilities:    
Derivative liabilities 33 27
Level 1    
Financial assets:    
Cash and cash equivalents 223,310 233,647
Securities available-for-sale 0 0
Securities held-to-maturity 0 0
Loans receivable, net 0 0
Loans held-for-sale 0 0
Accrued interest receivable 59,783 56,291
FHLB stock 0 0
Total financial assets 283,093 289,938
Financial liabilities:    
Savings and checking deposits 11,477,068 11,026,319
Time deposits 0 0
Borrowed funds before netting 816,493 446,836
Subordinated debt   0
Junior subordinated debentures 0 0
Accrued interest payable 7,616 6,846
Total financial liabilities 12,301,177 11,480,001
Level 1 | Recurring    
Financial assets:    
Securities available-for-sale 0 0
Total financial assets 0 0
Level 1 | Interest rate lock commitments    
Financial assets:    
Derivative assets 0 0
Level 1 | Interest rate lock commitments | Recurring    
Financial assets:    
Derivative assets 0 0
Level 1 | Forward commitments    
Financial assets:    
Derivative assets 0 0
Level 1 | Forward commitments | Recurring    
Financial assets:    
Derivative assets 0 0
Level 1 | Foreign exchange swaps    
Financial assets:    
Derivative assets   0
Level 1 | Foreign exchange swaps | Recurring    
Financial assets:    
Derivative assets   0
Level 1 | Interest rate swaps | Hedging    
Financial assets:    
Derivative asset before netting   0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 1 | Interest rate swaps | Hedging | Recurring    
Financial assets:    
Derivative asset before netting   0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 1 | Interest rate swaps | Not Hedging    
Financial assets:    
Derivative asset before netting 0 0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 1 | Interest rate swaps | Not Hedging | Recurring    
Financial assets:    
Derivative asset before netting 0 0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 1 | Risk participation agreements    
Financial liabilities:    
Derivative liabilities 0 0
Level 1 | Risk participation agreements | Recurring    
Financial liabilities:    
Derivative liabilities 0 0
Level 2    
Financial assets:    
Cash and cash equivalents 0 0
Securities available-for-sale 1,751,568 1,586,382
Securities held-to-maturity 518,383 605,929
Loans receivable, net 0 0
Loans held-for-sale 0 0
Accrued interest receivable 0 0
FHLB stock 0 0
Total financial assets 2,303,891 2,217,616
Financial liabilities:    
Savings and checking deposits 0 0
Time deposits 0 0
Borrowed funds before netting 0 0
Subordinated debt   114,800
Junior subordinated debentures 0 0
Accrued interest payable 0 0
Total financial liabilities 34,102 141,473
Level 2 | Recurring    
Financial assets:    
Securities available-for-sale 203,793 178,261
Total financial assets 1,785,508 1,611,687
Level 2 | Interest rate lock commitments    
Financial assets:    
Derivative assets 0 0
Level 2 | Interest rate lock commitments | Recurring    
Financial assets:    
Derivative assets 0 0
Level 2 | Forward commitments    
Financial assets:    
Derivative assets 6 95
Level 2 | Forward commitments | Recurring    
Financial assets:    
Derivative assets 6 95
Level 2 | Foreign exchange swaps    
Financial assets:    
Derivative assets   4
Level 2 | Foreign exchange swaps | Recurring    
Financial assets:    
Derivative assets   4
Level 2 | Interest rate swaps | Hedging    
Financial assets:    
Derivative asset before netting   51
Financial liabilities:    
Derivative liabilities, before netting 134 1,280
Level 2 | Interest rate swaps | Hedging | Recurring    
Financial assets:    
Derivative asset before netting   51
Financial liabilities:    
Derivative liabilities, before netting 134 1,280
Level 2 | Interest rate swaps | Not Hedging    
Financial assets:    
Derivative asset before netting 33,934 25,155
Financial liabilities:    
Derivative liabilities, before netting 33,935 25,366
Level 2 | Interest rate swaps | Not Hedging | Recurring    
Financial assets:    
Derivative asset before netting 33,934 25,155
Financial liabilities:    
Derivative liabilities, before netting 33,935 25,366
Level 2 | Risk participation agreements    
Financial liabilities:    
Derivative liabilities 33 27
Level 2 | Risk participation agreements | Recurring    
Financial liabilities:    
Derivative liabilities 33 27
Level 3    
Financial assets:    
Cash and cash equivalents 0 0
Securities available-for-sale 0 0
Securities held-to-maturity 0 0
Loans receivable, net 12,637,708 12,418,154
Loans held-for-sale 8,374 22,437
Accrued interest receivable 0 0
FHLB stock 0 0
Total financial assets 12,646,526 12,441,208
Financial liabilities:    
Savings and checking deposits 0 0
Time deposits 2,804,048 2,909,139
Borrowed funds before netting 0 0
Subordinated debt   0
Junior subordinated debentures 128,071 120,237
Accrued interest payable 0 0
Total financial liabilities 2,932,119 3,029,376
Level 3 | Recurring    
Financial assets:    
Securities available-for-sale 0 0
Total financial assets 444 617
Level 3 | Interest rate lock commitments    
Financial assets:    
Derivative assets 444 617
Level 3 | Interest rate lock commitments | Recurring    
Financial assets:    
Derivative assets 444 617
Level 3 | Forward commitments    
Financial assets:    
Derivative assets 0 0
Level 3 | Forward commitments | Recurring    
Financial assets:    
Derivative assets 0 0
Level 3 | Foreign exchange swaps    
Financial assets:    
Derivative assets   0
Level 3 | Foreign exchange swaps | Recurring    
Financial assets:    
Derivative assets   0
Level 3 | Interest rate swaps | Hedging    
Financial assets:    
Derivative asset before netting   0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 3 | Interest rate swaps | Hedging | Recurring    
Financial assets:    
Derivative asset before netting   0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 3 | Interest rate swaps | Not Hedging    
Financial assets:    
Derivative asset before netting 0 0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 3 | Interest rate swaps | Not Hedging | Recurring    
Financial assets:    
Derivative asset before netting 0 0
Financial liabilities:    
Derivative liabilities, before netting 0 0
Level 3 | Risk participation agreements    
Financial liabilities:    
Derivative liabilities 0 0
Level 3 | Risk participation agreements | Recurring    
Financial liabilities:    
Derivative liabilities 0 0
Carrying amount    
Financial assets:    
Cash and cash equivalents 223,310 233,647
Securities available-for-sale 1,751,568 1,586,382
Securities held-to-maturity 612,731 683,369
Loans receivable, net 13,243,670 12,857,104
Loans held-for-sale 8,374 22,437
Accrued interest receivable 59,783 56,291
FHLB stock 51,439 36,628
Total financial assets 15,953,104 15,488,349
Financial liabilities:    
Savings and checking deposits 11,477,068 11,026,319
Time deposits 2,797,970 2,916,698
Borrowed funds 786,715 446,283
Subordinated debt   114,800
Junior subordinated debentures 130,288 130,093
Accrued interest payable 7,616 6,846
Total financial liabilities 15,233,704 14,656,181
Carrying amount | Interest rate lock commitments    
Financial assets:    
Derivative assets 444 617
Carrying amount | Forward commitments    
Financial assets:    
Derivative assets 6 95
Carrying amount | Foreign exchange swaps    
Financial assets:    
Derivative assets   4
Carrying amount | Interest rate swaps | Hedging    
Financial assets:    
Derivative assets   0
Financial liabilities:    
Derivative liabilities 134 0
Carrying amount | Interest rate swaps | Not Hedging    
Financial assets:    
Derivative assets 1,779 11,775
Financial liabilities:    
Derivative liabilities 33,880 15,115
Carrying amount | Risk participation agreements    
Financial liabilities:    
Derivative liabilities 33 27
Estimated fair value    
Financial assets:    
Cash and cash equivalents 223,310 233,647
Securities available-for-sale 1,751,568 1,586,382
Securities held-to-maturity 518,383 605,929
Loans receivable, net 12,637,708 12,418,154
Loans held-for-sale 8,374 22,437
Accrued interest receivable 59,783 56,291
FHLB stock 51,439 36,628
Total financial assets 15,252,794 14,971,959
Financial liabilities:    
Savings and checking deposits 11,477,068 11,026,319
Time deposits 2,804,048 2,909,139
Borrowed funds 784,393 444,936
Subordinated debt   114,800
Junior subordinated debentures 128,071 120,237
Accrued interest payable 7,616 6,846
Total financial liabilities 15,235,243 14,637,419
Estimated fair value | Interest rate lock commitments    
Financial assets:    
Derivative assets 444 617
Estimated fair value | Forward commitments    
Financial assets:    
Derivative assets 6 95
Estimated fair value | Foreign exchange swaps    
Financial assets:    
Derivative assets   4
Estimated fair value | Interest rate swaps | Hedging    
Financial assets:    
Derivative assets   0
Financial liabilities:    
Derivative liabilities 134 0
Estimated fair value | Interest rate swaps | Not Hedging    
Financial assets:    
Derivative assets 1,779 11,775
Financial liabilities:    
Derivative liabilities 33,880 15,115
Estimated fair value | Risk participation agreements    
Financial liabilities:    
Derivative liabilities $ 33 $ 27