Comprehensive Income (Loss) - Schedule of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Before-Tax Amount
Other comprehensive (loss) income, before tax	$ (4,892)	$ (11,777)	$ 2,752	$ (40,185)
Tax (Expense) Benefit
Other comprehensive (loss) income, tax	1,262	3,010	(710)	10,274
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(3,790)	(8,833)	1,716	(30,004)
Reclassification from AOCI, current period	160	66	326	93
Other Comprehensive (Loss) Income	(3,630)	(8,767)	2,042	(29,911)
Unrealized Gains and Losses on Available for Sale Securities
Before-Tax Amount
OCI, before reclassifications	(5,186)	(13,045)	3,033	(43,000)
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	1,337	3,334	(783)	10,993
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(3,849)	(9,711)	2,250	(32,007)
Reclassification from AOCI, current period	0	0	0	0
Other Comprehensive (Loss) Income	(3,849)	(9,711)	2,250	(32,007)
Unrealized Loss on Cash Flow Swap
Before-Tax Amount
OCI, before reclassifications	79	1,179	(721)	2,691
Reclassification from AOCI, current period	220	11	418	(18)
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	(20)	(301)	187	(688)
Reclassification from AOCI, current period	(57)	(3)	(108)	5
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	59	878	(534)	2,003
Reclassification from AOCI, current period	163	8	310	(13)
Other Comprehensive (Loss) Income	222	886	(224)	1,990
Amortization of Net Retirement Plan Actuarial Gain (Loss)
Before-Tax Amount
Reclassification from AOCI, current period	(56)	(29)	(81)	28
Tax (Expense) Benefit
Reclassification from AOCI, current period	14	8	21	(7)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0	0	0
Reclassification from AOCI, current period	(42)	(21)	(60)	21
Other Comprehensive (Loss) Income	(42)	(21)	(60)	21
Amortization of Defined Benefit Pension, Prior-Service Costs
Before-Tax Amount
Reclassification from AOCI, current period	51	107	103	114
Tax (Expense) Benefit
Reclassification from AOCI, current period	(12)	(28)	(27)	(29)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0	0	0
Reclassification from AOCI, current period	39	79	76	85
Other Comprehensive (Loss) Income	$ 39	$ 79	$ 76	$ 85