Investment Securities - Held-to-Maturity and Available-for-Sale, Scheduled Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Securities, Held-to-Maturity, Amortized Cost	$ 143,474	$ 145,777
Securities Held-to-Maturity, Gross Unrealized Gains	0	0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(19,452)	(17,500)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss	124,022	128,277
Debt Securities, Available-for-sale [Abstract]
Investment securities available-for-sale, amortized cost	397,982	395,727
Securities Available-for-Sale, Gross Unrealized Gain	141	155
Securities Available-for-Sale, Gross Unrealized Losses	(46,487)	(43,598)
Allowance for credit losses	817	731
Debt securities	350,819	351,553
Residential mortgage-backed securities
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Securities Held-to-Maturity, Amortized Cost, After 1 Year to 5 Years	1,660	1,871
Securities Held-to-Maturity, Gross Unrealized Gains, After 1 Year to 5 Years	0	0
Securities Held-to-Maturity, Gross Unrealized Losses, After 1 Year to 5 Years	(60)	(62)
Securities Held-to-Maturity, Allowance for Credit Loss, After 1 Year to 5 Years	0	0
Securities Held-to-Maturity, Fair Value, After 1 Year to 5 Years	1,600	1,809
Securities Held-to-Maturity, Amortized Cost, After 5 Years to 10 Years	11,934	12,047
Securities Held-to-Maturity, Gross Unrealized Gains, After 5 Years to 10 Years	0	0
Securities Held-to-Maturity, Gross Unrealized Losses, After 5 Years to 10 Years	(596)	(462)
Securities, Held-to-Maturity, Allowance for Credit Loss, After 5 Years To 10 Years	0	0
Securities Held-to-Maturity, Fair Value, After 5 Years to 10 Years	11,338	11,585
Securities Held-to-Maturity, Amortized Cost, Over 10 Years	129,880	131,859
Securities Held-to-Maturity, Gross Unrealized Gain, Over 10 Years	0	0
Securities Held-to-Maturity, Gross Unrealized Losses, Over 10 Years	(18,796)	(16,976)
Securities Held-to-maturity, Allowance for Credit Loss, Over 10 Years	0	0
Securities Held-to-Maturity, Fair Value, After 10 years	111,084	114,883
Securities, Held-to-Maturity, Amortized Cost	143,474	145,777
Securities Held-to-Maturity, Gross Unrealized Gains	0	0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(19,452)	(17,500)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss	124,022	128,277
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 Year to 5 Years	499	567
Securities Available-for-Sale,Gross Unrealized Gain, After 1 Year to 5 Years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 1 Year to 5 Years	(18)	(20)
Securities Available-for-sale, Allowance for Credit Loss, After 1 Year to 5 Years	0	0
Securities Available-for-Sale, Fair Value, After 1 Year to 5 Years	481	547
Securities Available-for-Sale, Amortized Cost, After 5 Years to 10 Years	13,082	13,653
Securities Available-for-Sale,Gross Unrealized Gain, After 5 Years to 10 Years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 5 Years to 10 Years	(1,040)	(964)
Securities Available-for-Sale, Allowance for Credit Loss, After 5 Years to 10 Years	0	0
Securities Available-for-Sale, Fair Value, After 5 Years to 10 Years	12,042	12,689
Securities Available-for-Sale, Amortized Cost, Over 10 Years	289,639	285,628
Securities Available-for-Sale,Gross Unrealized Gain, Over 10 Years	128	131
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 Years	(38,141)	(34,443)
Securities Available-for-Sale, Allowance for Credit Loss, After 10 Years	0	0
Securities Available-for-Sale, Fair Value, Over 10 Years	251,626	251,316
Investment securities available-for-sale, amortized cost	303,220	299,848
Securities Available-for-Sale, Gross Unrealized Gain	128	131
Securities Available-for-Sale, Gross Unrealized Losses	(39,199)	(35,427)
Allowance for credit losses	0	0
Debt securities	264,149	264,552
State and political subdivisions
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 Year	1,299	1,030
Securities Available-for-Sale,Gross Unrealized Gain, Within 1 Year	0	0
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 Year	(30)	(1)
Securities Available-for-Sale, Allowance for Credit Loss, Within 1 Year	0	0
Securities Available-for-Sale, Fair Value, Within 1 Year	1,269	1,029
Securities Available-for-Sale, Amortized Cost, After 1 Year to 5 Years		1,298
Securities Available-for-Sale,Gross Unrealized Gain, After 1 Year to 5 Years		0
Securities Available-for-Sale, Gross Unrealized Losses, After 1 Year to 5 Years		(26)
Securities Available-for-sale, Allowance for Credit Loss, After 1 Year to 5 Years		0
Securities Available-for-Sale, Fair Value, After 1 Year to 5 Years		1,272
Investment securities available-for-sale, amortized cost	1,299	2,328
Securities Available-for-Sale, Gross Unrealized Gain	0	0
Securities Available-for-Sale, Gross Unrealized Losses	(30)	(27)
Allowance for credit losses	0	0
Debt securities	1,269	2,301
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, After 5 Years to 10 Years	218	241
Securities Available-for-Sale,Gross Unrealized Gain, After 5 Years to 10 Years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 5 Years to 10 Years	(10)	(11)
Securities Available-for-Sale, Allowance for Credit Loss, After 5 Years to 10 Years	0	0
Securities Available-for-Sale, Fair Value, After 5 Years to 10 Years	208	230
Securities Available-for-Sale, Amortized Cost, Over 10 Years	1,902	1,960
Securities Available-for-Sale,Gross Unrealized Gain, Over 10 Years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 Years	(183)	(189)
Securities Available-for-Sale, Allowance for Credit Loss, After 10 Years	0	0
Securities Available-for-Sale, Fair Value, Over 10 Years	1,719	1,771
Investment securities available-for-sale, amortized cost	2,120	2,201
Securities Available-for-Sale, Gross Unrealized Gain	0	0
Securities Available-for-Sale, Gross Unrealized Losses	(193)	(200)
Allowance for credit losses	0	0
Debt securities	1,927	2,001
Corporate bonds
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 Year	18,503	18,011
Securities Available-for-Sale,Gross Unrealized Gain, Within 1 Year	0	1
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 Year	(95)	(176)
Securities Available-for-Sale, Allowance for Credit Loss, Within 1 Year	(8)	(27)
Securities Available-for-Sale, Fair Value, Within 1 Year	18,400	17,809
Securities Available-for-Sale, Amortized Cost, After 1 Year to 5 Years	12,840	13,339
Securities Available-for-Sale,Gross Unrealized Gain, After 1 Year to 5 Years	13	23
Securities Available-for-Sale, Gross Unrealized Losses, After 1 Year to 5 Years	(643)	(671)
Securities Available-for-sale, Allowance for Credit Loss, After 1 Year to 5 Years	(43)	(43)
Securities Available-for-Sale, Fair Value, After 1 Year to 5 Years	12,167	12,648
Securities Available-for-Sale, Amortized Cost, After 5 Years to 10 Years	60,000	60,000
Securities Available-for-Sale,Gross Unrealized Gain, After 5 Years to 10 Years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 5 Years to 10 Years	(6,327)	(7,097)
Securities Available-for-Sale, Allowance for Credit Loss, After 5 Years to 10 Years	(766)	(661)
Securities Available-for-Sale, Fair Value, After 5 Years to 10 Years	52,907	52,242
Investment securities available-for-sale, amortized cost	91,343	91,350
Securities Available-for-Sale, Gross Unrealized Gain	13	24
Securities Available-for-Sale, Gross Unrealized Losses	(7,065)	(7,944)
Allowance for credit losses	817	731	$ 1,432	$ 1,140
Debt securities	$ 83,474	$ 82,699