v3.26.1
Fair Value of Financial Instruments - Schedule of Estimated Fair Values and Carrying Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financial assets:    
Net loans HFI $ 12,671,500 $ 12,197,643
Interest receivable $ 58,792 $ 58,565
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other assets Other assets
Financial liabilities:    
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Accrued expenses and other liabilities Accrued expenses and other liabilities
Carrying amount    
Financial assets:    
Cash and cash equivalents $ 1,112,357 $ 1,155,895
Investment securities 1,527,093 1,459,734
Net loans HFI 12,671,500 12,197,643
Loans held for sale, at fair value 165,511 172,974
Interest receivable 58,792 58,565
Mortgage servicing rights 145,374 148,795
Derivatives 23,444 24,316
Financial liabilities:    
Without stated maturities 11,040,979 11,255,404
With stated maturities 3,306,187 2,654,557
Securities sold under agreements to repurchase and federal funds purchased 71,530 99,865
Federal Home Loan Bank advances 125,000  
Subordinated debt, net 84,328 83,670
Interest payable 20,788 21,549
Derivatives 19,853 23,509
 Fair Value    
Financial assets:    
Cash and cash equivalents 1,112,357 1,155,895
Investment securities 1,527,093 1,459,734
Net loans HFI 12,654,152 12,155,340
Loans held for sale, at fair value 165,511 172,974
Interest receivable 58,792 58,565
Mortgage servicing rights 145,374 148,795
Derivatives 23,444 24,316
Financial liabilities:    
Without stated maturities 11,040,979 11,255,404
With stated maturities 3,300,504 2,655,532
Securities sold under agreements to repurchase and federal funds purchased 71,530 99,865
Federal Home Loan Bank advances 125,000  
Subordinated debt, net 90,577 88,281
Interest payable 20,788 21,549
Derivatives 19,853 23,509
 Fair Value | Level 1    
Financial assets:    
Cash and cash equivalents 1,112,357 1,155,895
Investment securities 6,000 0
Net loans HFI 0 0
Loans held for sale, at fair value 0 0
Interest receivable 307 463
Mortgage servicing rights 0 0
Derivatives 0 0
Financial liabilities:    
Without stated maturities 11,040,979 11,255,404
With stated maturities 0 0
Securities sold under agreements to repurchase and federal funds purchased 71,530 99,865
Federal Home Loan Bank advances 0  
Subordinated debt, net 0 0
Interest payable 2,877 3,677
Derivatives 0 0
 Fair Value | Level 2    
Financial assets:    
Cash and cash equivalents 0 0
Investment securities 1,521,093 1,459,734
Net loans HFI 0 0
Loans held for sale, at fair value 165,511 172,974
Interest receivable 7,988 7,962
Mortgage servicing rights 0 0
Derivatives 23,444 24,316
Financial liabilities:    
Without stated maturities 0 0
With stated maturities 3,300,504 2,655,532
Securities sold under agreements to repurchase and federal funds purchased 0 0
Federal Home Loan Bank advances 125,000  
Subordinated debt, net 0 0
Interest payable 17,911 17,872
Derivatives 19,853 23,509
 Fair Value | Level 3    
Financial assets:    
Cash and cash equivalents 0 0
Investment securities 0 0
Net loans HFI 12,654,152 12,155,340
Loans held for sale, at fair value 0 0
Interest receivable 50,497 50,140
Mortgage servicing rights 145,374 148,795
Derivatives 0 0
Financial liabilities:    
Without stated maturities 0 0
With stated maturities 0 0
Securities sold under agreements to repurchase and federal funds purchased 0 0
Federal Home Loan Bank advances 0  
Subordinated debt, net 90,577 88,281
Interest payable 0 0
Derivatives $ 0 $ 0