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, 2024	Dec. 31, 2023
AFS securities [Abstract]
AFS securities	$ 1,509,338	$ 1,430,858
Equity securities	$ 41,974	37,591
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	$ 128,538	125,024
Federal Agency [Member]
AFS securities [Abstract]
AFS securities	222,639	214,740
State & Municipal [Member]
AFS securities [Abstract]
AFS securities	88,903	86,306
Corporate [Member]
AFS securities [Abstract]
AFS securities	43,405	40,976
Recurring Basis [Member]
AFS securities [Abstract]
AFS securities	1,509,338	1,430,858
Equity securities	41,974	37,591
Derivatives	$ 63,367	$ 75,142
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Total	$ 1,614,679	$ 1,543,591
Liabilities [Abstract]
Derivatives	$ 80,236	$ 95,875
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Total	$ 80,236	$ 95,875
Recurring Basis [Member] | Level 1 [Member]
AFS securities [Abstract]
AFS securities	128,538	125,024
Equity securities	40,974	36,591
Derivatives	0	0
Total	169,512	161,615
Liabilities [Abstract]
Derivatives	0	0
Total	0	0
Recurring Basis [Member] | Level 2 [Member]
AFS securities [Abstract]
AFS securities	1,380,800	1,305,834
Equity securities	1,000	1,000
Derivatives	63,367	75,142
Total	1,445,167	1,381,976
Liabilities [Abstract]
Derivatives	80,236	95,875
Total	80,236	95,875
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	128,538	125,024
Recurring Basis [Member] | U.S. Treasury [Member] | Level 1 [Member]
AFS securities [Abstract]
AFS securities	128,538	125,024
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	222,639	214,740
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	222,639	214,740
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	88,903	86,306
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	88,903	86,306
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	421,724	422,268
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	421,724	422,268
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	604,129	541,544
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	604,129	541,544
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	43,405	40,976
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	43,405	40,976
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	$ 3,000	$ 0