Comprehensive Income (Loss), Net of Tax - Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Before-Tax Amount
Other comprehensive income (loss)	$ 20,162	$ 21,880	$ (67,180)
Tax (Benefit) Expense
Other comprehensive income (loss)	(5,199)	(5,641)	17,178
Net-of-Tax Amount
Other comprehensive income (loss) before reclassifications	14,595	8,897	(50,364)
Prior Service Cost	(327)	(391)	0
Reclassification from AOCI, current period	368	7,342	362
Other Comprehensive Income (Loss)	14,963	16,239	(50,002)
Net Unrealized Securities Holding Gains (Losses) Arising During the Period
Before-Tax Amount
OCI, before reclassifications	2,833	14,070	(64,774)
Reclassification from AOCI, current period	3,038	9,097
Tax (Benefit) Expense
Net Unrealized Securities Holding Gains (Losses) Arising During the Period	(732)	(3,629)	16,547
Reclassification from AOCI, current period	(783)	(2,345)
Net-of-Tax Amount
Other comprehensive income (loss) before reclassifications	2,101	10,441	(48,227)
Reclassification from AOCI, current period	2,255	6,752	0
Other Comprehensive Income (Loss)	4,356	17,193	(48,227)
Net Unrealized Gains (Losses) on Cash Flow Swap
Before-Tax Amount
OCI, before reclassifications	6,498	(3,908)	3,467
Reclassification from AOCI, current period	(2,502)	750	204
Tax (Benefit) Expense
Net Unrealized Securities Holding Gains (Losses) Arising During the Period	(1,675)	1,008	(885)
Reclassification from AOCI, current period	645	(193)	(52)
Net-of-Tax Amount
Other comprehensive income (loss) before reclassifications	4,823	(2,900)	2,582
Reclassification from AOCI, current period	(1,857)	557	152
Other Comprehensive Income (Loss)	2,966	(2,343)	2,734
Net Actuarial Gain (Loss)
Before-Tax Amount
OCI, before reclassifications	10,777	2,354	(6,938)
Prior Service Cost	(441)
Reclassification from AOCI, current period	(313)	(162)	56
Tax (Benefit) Expense
Net Unrealized Securities Holding Gains (Losses) Arising During the Period	(2,779)	(607)	1,791
Prior Service Cost	114
Reclassification from AOCI, current period	81	43	(15)
Net-of-Tax Amount
Other comprehensive income (loss) before reclassifications	7,998	1,747	(5,147)
Prior Service Cost	(327)
Reclassification from AOCI, current period	(232)	(119)	41
Other Comprehensive Income (Loss)	7,766	1,628	(5,106)
Settlement Cost
Before-Tax Amount
Reclassification from AOCI, current period			577
Tax (Benefit) Expense
Reclassification from AOCI, current period			(149)
Net-of-Tax Amount
Reclassification from AOCI, current period			428
Amortization of Net Retirement Plan Prior Service Cost
Before-Tax Amount
OCI, before reclassifications		(526)
Reclassification from AOCI, current period	272	205	228
Tax (Benefit) Expense
Net Unrealized Securities Holding Gains (Losses) Arising During the Period		135
Reclassification from AOCI, current period	(70)	(53)	(59)
Net-of-Tax Amount
Other comprehensive income (loss) before reclassifications	(327)	(391)	428
Reclassification from AOCI, current period	202	152	169
Other Comprehensive Income (Loss)	$ (125)	$ (239)	$ 597