Comprehensive Income - Schedule of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Before-Tax Amount
Other Comprehensive (Loss) Income, before tax	$ 7,631	$ (6,697)	$ 10,036	$ (3,945)
Tax (Expense) Benefit
Other Comprehensive (Loss) Income, tax	(1,967)	1,726	(2,588)	1,016
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	5,818	(5,161)	7,934	(3,445)
Reclassification from AOCI, current period	(154)	190	(486)	516
Other Comprehensive Income (Loss)	5,664	(4,971)	7,448	(2,929)
Net Unrealized Securities Holding Gain on Securities Available-for-Sale Arising During the Period
Before-Tax Amount
OCI, before reclassifications	12,505	(7,796)	11,457	(4,763)
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	(3,223)	2,010	(2,954)	1,227
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	9,282	(5,786)	8,503	(3,536)
Reclassification from AOCI, current period	0	0	0	0
Other Comprehensive Income (Loss)	9,282	(5,786)	8,503	(3,536)
Net Unrealized Gain (Loss) on Cash Flow Swap
Before-Tax Amount
OCI, before reclassifications	(4,667)	846	(766)	125
Reclassification from AOCI, current period	(196)	242	(624)	660
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	1,203	(221)	197	(34)
Reclassification from AOCI, current period	50	(61)	161	(169)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(3,464)	625	(569)	91
Reclassification from AOCI, current period	(146)	181	(463)	491
Other Comprehensive Income (Loss)	(3,610)	806	(1,032)	582
Amortization of Net Retirement Plan Actuarial (Gain)
Before-Tax Amount
Reclassification from AOCI, current period	(78)	(40)	(235)	(121)
Tax (Expense) Benefit
Reclassification from AOCI, current period	20	10	61	31
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0	0	0
Reclassification from AOCI, current period	(58)	(30)	(174)	(90)
Other Comprehensive Income (Loss)	(58)	(30)	(174)	(90)
Amortization of Net Retirement Plan Prior Service Cost
Before-Tax Amount
Reclassification from AOCI, current period	67	51	204	154
Tax (Expense) Benefit
Reclassification from AOCI, current period	(17)	(12)	(53)	(39)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0	0	0
Reclassification from AOCI, current period	50	39	151	115
Other Comprehensive Income (Loss)	$ 50	$ 39	$ 151	$ 115

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