v3.25.1
Fair Value Measurements and Fair Value of Financial Instruments, Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
AFS securities [Abstract]    
AFS securities $ 1,704,677 $ 1,574,664
Equity securities $ 41,561 42,372
Minimum [Member]    
Fair Value Measurements [Abstract]    
Liquidation expense ratio on impaired collateral 10.00%  
Maximum [Member]    
Fair Value Measurements [Abstract]    
Liquidation expense ratio on impaired collateral 50.00%  
U.S. Treasury [Member]    
AFS securities [Abstract]    
AFS securities $ 104,227 102,790
Federal Agency [Member]    
AFS securities [Abstract]    
AFS securities 223,429 218,517
State & Municipal [Member]    
AFS securities [Abstract]    
AFS securities 88,702 87,490
Corporate [Member]    
AFS securities [Abstract]    
AFS securities 45,784 45,014
Recurring Basis [Member]    
AFS securities [Abstract]    
AFS securities 1,704,677 1,574,664
Equity securities 41,561 42,372
Derivatives $ 67,284 $ 80,847
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other Assets Other Assets
Total $ 1,813,522 $ 1,697,883
Liabilities [Abstract]    
Derivatives $ 86,910 $ 104,399
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities
Total $ 86,910 $ 104,399
Recurring Basis [Member] | Level 1 [Member]    
AFS securities [Abstract]    
AFS securities 104,227 102,790
Equity securities 40,561 41,372
Derivatives 0 0
Total 144,788 144,162
Liabilities [Abstract]    
Derivatives 0 0
Total 0 0
Recurring Basis [Member] | Level 2 [Member]    
AFS securities [Abstract]    
AFS securities 1,600,450 1,471,874
Equity securities 1,000 1,000
Derivatives 67,284 80,847
Total 1,668,734 1,553,721
Liabilities [Abstract]    
Derivatives 86,910 104,399
Total 86,910 104,399
Recurring Basis [Member] | Level 3 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Equity securities 0 0
Derivatives 0 0
Total 0 0
Liabilities [Abstract]    
Derivatives 0 0
Total 0 0
Recurring Basis [Member] | U.S. Treasury [Member]    
AFS securities [Abstract]    
AFS securities 104,227 102,790
Recurring Basis [Member] | U.S. Treasury [Member] | Level 1 [Member]    
AFS securities [Abstract]    
AFS securities 104,227 102,790
Recurring Basis [Member] | U.S. Treasury [Member] | Level 2 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | U.S. Treasury [Member] | Level 3 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Federal Agency [Member]    
AFS securities [Abstract]    
AFS securities 223,429 218,517
Recurring Basis [Member] | Federal Agency [Member] | Level 1 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Federal Agency [Member] | Level 2 [Member]    
AFS securities [Abstract]    
AFS securities 223,429 218,517
Recurring Basis [Member] | Federal Agency [Member] | Level 3 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | State & Municipal [Member]    
AFS securities [Abstract]    
AFS securities 88,702 87,490
Recurring Basis [Member] | State & Municipal [Member] | Level 1 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | State & Municipal [Member] | Level 2 [Member]    
AFS securities [Abstract]    
AFS securities 88,702 87,490
Recurring Basis [Member] | State & Municipal [Member] | Level 3 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Mortgage-Backed [Member]    
AFS securities [Abstract]    
AFS securities 503,077 464,365
Recurring Basis [Member] | Mortgage-Backed [Member] | Level 1 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Mortgage-Backed [Member] | Level 2 [Member]    
AFS securities [Abstract]    
AFS securities 503,077 464,365
Recurring Basis [Member] | Mortgage-Backed [Member] | Level 3 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member]    
AFS securities [Abstract]    
AFS securities 739,458 656,488
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member] | Level 1 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member] | Level 2 [Member]    
AFS securities [Abstract]    
AFS securities 739,458 656,488
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member] | Level 3 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Corporate [Member]    
AFS securities [Abstract]    
AFS securities 45,784 45,014
Recurring Basis [Member] | Corporate [Member] | Level 1 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Recurring Basis [Member] | Corporate [Member] | Level 2 [Member]    
AFS securities [Abstract]    
AFS securities 45,784 45,014
Recurring Basis [Member] | Corporate [Member] | Level 3 [Member]    
AFS securities [Abstract]    
AFS securities 0 0
Non-Recurring Basis [Member]    
Fair Value Measurements [Abstract]    
Loans individually evaluated for expected credit losses, fair value $ 26,700 $ 28,800