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	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
AFS securities [Abstract]
AFS securities	$ 1,813,194	$ 1,574,664
Equity securities	$ 49,607	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	$ 101,080	102,790
Federal Agency [Member]
AFS securities [Abstract]
AFS securities	229,056	218,517
State & Municipal [Member]
AFS securities [Abstract]
AFS securities	88,697	87,490
Corporate [Member]
AFS securities [Abstract]
AFS securities	31,952	45,014
Recurring Basis [Member]
AFS securities [Abstract]
AFS securities	1,813,194	1,574,664
Equity securities	49,607	42,372
Derivatives	$ 54,257	$ 80,847
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Total	$ 1,917,058	$ 1,697,883
Liabilities [Abstract]
Derivatives	$ 70,245	$ 104,399
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Total	$ 70,245	$ 104,399
Recurring Basis [Member] | Level 1 [Member]
AFS securities [Abstract]
AFS securities	101,080	102,790
Equity securities	48,607	41,372
Derivatives	0	0
Total	149,687	144,162
Liabilities [Abstract]
Derivatives	0	0
Total	0	0
Recurring Basis [Member] | Level 2 [Member]
AFS securities [Abstract]
AFS securities	1,712,114	1,471,874
Equity securities	1,000	1,000
Derivatives	54,257	80,847
Total	1,767,371	1,553,721
Liabilities [Abstract]
Derivatives	70,245	104,399
Total	70,245	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	101,080	102,790
Recurring Basis [Member] | U.S. Treasury [Member] | Level 1 [Member]
AFS securities [Abstract]
AFS securities	101,080	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	229,056	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	229,056	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	88,697	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	88,697	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	565,303	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	565,303	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	797,106	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	797,106	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	31,952	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	31,952	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	$ 16,000	$ 28,800