Comprehensive Income (Loss), Net of Tax - Schedule of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Before-Tax Amount
Other Comprehensive Income, before tax	$ 19,416	$ 20,162	$ 21,880
Tax (Benefit) Expense
Other Comprehensive Income, tax	(5,000)	(5,199)	(5,641)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	15,141	14,595	8,897
Reclassification from AOCI, current period	(725)	368	7,342
Other Comprehensive Income	14,416	14,963	16,239
Net Unrealized Securities Holding Gains Arising During the Period
Before-Tax Amount
OCI, before reclassifications	19,528	2,833	14,070
Reclassification from AOCI, current period		3,038	9,097
Tax (Benefit) Expense
Other comprehensive (loss) income before reclassifications, tax	(5,035)	(732)	(3,629)
Reclassification from AOCI, current period		(783)	(2,345)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	14,493	2,101	10,441
Reclassification from AOCI, current period	0	2,255	6,752
Other Comprehensive Income	14,493	4,356	17,193
Net Unrealized Gains (Losses) on Cash Flow Swap
Before-Tax Amount
OCI, before reclassifications	(2,177)	6,498	(3,908)
Reclassification from AOCI, current period	(798)	(2,502)	750
Tax (Benefit) Expense
Other comprehensive (loss) income before reclassifications, tax	567	(1,675)	1,008
Reclassification from AOCI, current period	206	645	(193)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(1,610)	4,823	(2,900)
Reclassification from AOCI, current period	(592)	(1,857)	557
Other Comprehensive Income	(2,202)	2,966	(2,343)
Net Actuarial Gain
Before-Tax Amount
OCI, before reclassifications	3,043	10,777	2,354
Reclassification from AOCI, current period	(510)	(313)	(162)
Tax (Benefit) Expense
Other comprehensive (loss) income before reclassifications, tax	(785)	(2,779)	(607)
Reclassification from AOCI, current period	132	81	43
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	2,258	7,998	1,747
Reclassification from AOCI, current period	(378)	(232)	(119)
Other Comprehensive Income	1,880	7,766	1,628
Amortization of Net Retirement Plan Prior Service Cost
Before-Tax Amount
OCI, before reclassifications		(441)	(526)
Reclassification from AOCI, current period	330	272	205
Tax (Benefit) Expense
Other comprehensive (loss) income before reclassifications, tax		114	135
Reclassification from AOCI, current period	(85)	(70)	(53)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	(327)	(391)
Reclassification from AOCI, current period	245	202	152
Other Comprehensive Income	$ 245	$ (125)	$ (239)