Fair Value Measurements and Fair Values of Financial Instruments, Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
AFS securities [Abstract]
AFS securities	$ 1,430,858	$ 1,527,225
Equity securities	$ 37,591	30,784
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	$ 125,024	121,658
Federal Agency [Member]
AFS securities [Abstract]
AFS securities	214,740	206,419
State & Municipal [Member]
AFS securities [Abstract]
AFS securities	86,306	82,851
Corporate [Member]
AFS securities [Abstract]
AFS securities	40,976	54,240
Recurring Basis [Member]
AFS securities [Abstract]
AFS securities	1,430,858	1,527,225
Equity securities	37,591	30,784
Derivatives	$ 75,142	$ 93,185
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Total	$ 1,543,591	$ 1,651,194
Liabilities [Abstract]
Derivatives	$ 95,875	$ 117,257
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Total	$ 95,875	$ 117,257
Recurring Basis [Member] | Level 1 [Member]
AFS securities [Abstract]
AFS securities	125,024	121,658
Equity securities	36,591	29,784
Derivatives	0	0
Total	161,615	151,442
Liabilities [Abstract]
Derivatives	0	0
Total	0	0
Recurring Basis [Member] | Level 2 [Member]
AFS securities [Abstract]
AFS securities	1,305,834	1,405,567
Equity securities	1,000	1,000
Derivatives	75,142	93,185
Total	1,381,976	1,499,752
Liabilities [Abstract]
Derivatives	95,875	117,257
Total	95,875	117,257
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	125,024	121,658
Recurring Basis [Member] | U.S. Treasury [Member] | Level 1 [Member]
AFS securities [Abstract]
AFS securities	125,024	121,658
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	214,740	206,419
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	214,740	206,419
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	86,306	82,851
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	86,306	82,851
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	422,268	473,694
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	422,268	473,694
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	541,544	588,363
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	541,544	588,363
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	40,976	54,240
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	40,976	54,240
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	$ 0	$ 1,100