Investment Securities - Held-to-Maturity and Available-for-Sale, Scheduled Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Securities, Held-to-Maturity, Amortized Cost	$ 149,451	$ 154,727
Securities Held-to-Maturity, Gross Unrealized Gains	0	0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(25,691)	(20,659)
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	123,760	134,068
Debt Securities, Available-for-sale [Abstract]
Investment securities available-for-sale (amortized cost $396,804 and $402,111, net of allowance for credit losses of $1,537 and $1,140 at September 30, 2023 and December 31, 2022, respectively)	396,804	402,111
Securities Available-for-Sale, Gross Unrealized Gain	0	10
Securities Available-for-Sale, Gross Unrealized Losses	(60,729)	(50,725)
Allowance for credit losses	1,537	1,140
Debt securities	334,538	350,256
Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Securities Held-to-Maturity, Amortized Cost, After 1 Year to 5 Years	2,077	1,654
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	(95)	(70)
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	1,982	1,584
Securities Held-to-Maturity, Amortized Cost, After 5 Years to 10 Years	10,100	6,076
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	(763)	(342)
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	9,337	5,734
Securities Held-to-Maturity, Amortized Cost, Over 10 Years	137,274	146,997
Securities Held-to-Maturity, Gross Unrealized Gain, Over 10 Years	0	0
Securities Held-to-Maturity, Gross Unrealized Losses, Over 10 Years	(24,833)	(20,247)
Securities Held-to-maturity, Allowance for Credit Loss, Over 10 Years	0	0
Securities Held-to-Maturity, Fair Value, After 10 years	112,441	126,750
Securities, Held-to-Maturity, Amortized Cost	149,451	154,727
Securities Held-to-Maturity, Gross Unrealized Gains	0	0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(25,691)	(20,659)
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	123,760	134,068
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 Year to 5 Years	632	864
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	(27)	(37)
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	605	827
Securities Available-for-Sale, Amortized Cost, After 5 Years to 10 Years	14,257	10,399
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	(1,818)	(815)
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	12,439	9,584
Securities Available-for-Sale, Amortized Cost, Over 10 Years	286,909	294,261
Securities Available-for-Sale,Gross Unrealized Gain, Over 10 Years	0	7
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 Years	(50,788)	(41,291)
Securities Available-for-Sale, Allowance for Credit Loss, After 10 Years	0	0
Securities Available-for-Sale, Fair Value, Over 10 Years	236,121	252,977
Investment securities available-for-sale (amortized cost $396,804 and $402,111, net of allowance for credit losses of $1,537 and $1,140 at September 30, 2023 and December 31, 2022, respectively)	301,798	305,524
Securities Available-for-Sale, Gross Unrealized Gain	0	7
Securities Available-for-Sale, Gross Unrealized Losses	(52,633)	(42,143)
Allowance for credit losses	0	0
Debt securities	249,165	263,388
State and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 Year	1,030
Securities Available-for-Sale,Gross Unrealized Gain, Within 1 Year	0
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 Year	(5)
Securities Available-for-Sale, Allowance for Credit Loss, Within 1 Year	0
Securities Available-for-Sale, Fair Value, Within 1 Year	1,025
Securities Available-for-Sale, Amortized Cost, After 1 Year to 5 Years	1,298	2,327
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	(56)	(42)
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	1,242	2,285
Investment securities available-for-sale (amortized cost $396,804 and $402,111, net of allowance for credit losses of $1,537 and $1,140 at September 30, 2023 and December 31, 2022, respectively)	2,328	2,327
Securities Available-for-Sale, Gross Unrealized Gain	0	0
Securities Available-for-Sale, Gross Unrealized Losses	(61)	(42)
Allowance for credit losses	0	0
Debt securities	2,267	2,285
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, After 5 Years to 10 Years	262	324
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	(16)	(22)
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	246	302
Securities Available-for-Sale, Amortized Cost, Over 10 Years	2,030	2,257
Securities Available-for-Sale,Gross Unrealized Gain, Over 10 Years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 Years	(242)	(237)
Securities Available-for-Sale, Allowance for Credit Loss, After 10 Years	0	0
Securities Available-for-Sale, Fair Value, Over 10 Years	1,788	2,020
Investment securities available-for-sale (amortized cost $396,804 and $402,111, net of allowance for credit losses of $1,537 and $1,140 at September 30, 2023 and December 31, 2022, respectively)	2,292	2,581
Securities Available-for-Sale, Gross Unrealized Gain	0	0
Securities Available-for-Sale, Gross Unrealized Losses	(258)	(259)
Allowance for credit losses	0	0
Debt securities	2,034	2,322
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 Year	16,518	1,000
Securities Available-for-Sale,Gross Unrealized Gain, Within 1 Year	0	0
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 Year	(147)	0
Securities Available-for-Sale, Allowance for Credit Loss, Within 1 Year	(117)	0
Securities Available-for-Sale, Fair Value, Within 1 Year	16,254	1,000
Securities Available-for-Sale, Amortized Cost, After 1 Year to 5 Years	13,868	30,679
Securities Available-for-Sale,Gross Unrealized Gain, After 1 Year to 5 Years	0	3
Securities Available-for-Sale, Gross Unrealized Losses, After 1 Year to 5 Years	(987)	(1,516)
Securities Available-for-sale, Allowance for Credit Loss, After 1 Year to 5 Years	(74)	(152)
Securities Available-for-Sale, Fair Value, After 1 Year to 5 Years	12,807	29,014
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	(6,643)	(6,765)
Securities Available-for-Sale, Allowance for Credit Loss, After 5 Years to 10 Years	(1,346)	(988)
Securities Available-for-Sale, Fair Value, After 5 Years to 10 Years	52,011	52,247
Investment securities available-for-sale (amortized cost $396,804 and $402,111, net of allowance for credit losses of $1,537 and $1,140 at September 30, 2023 and December 31, 2022, respectively)	90,386	91,679
Securities Available-for-Sale, Gross Unrealized Gain	0	3
Securities Available-for-Sale, Gross Unrealized Losses	(7,777)	(8,281)
Allowance for credit losses	1,537	1,140	$ 1,299	$ 929
Debt securities	$ 81,072	$ 82,261