Comprehensive Income (Loss) - Schedule of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Before-Tax Amount
Other comprehensive (loss) income, before tax	$ 7,644	$ (28,408)
Tax (Expense) Benefit
Other comprehensive (loss) income, tax	(1,972)	7,264
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	5,506	(21,171)
Reclassification from AOCI, current period	166	27
Other Comprehensive Income (Loss)	5,672	(21,144)
Unrealized Gains and Losses on Available for Sale Securities
Before-Tax Amount
OCI, before reclassifications	8,219	(29,955)
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	(2,120)	7,659
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	6,099	(22,296)
Reclassification from AOCI, current period	0	0
Other Comprehensive Income (Loss)	6,099	(22,296)
Unrealized Loss on Cash Flow Swap
Before-Tax Amount
OCI, before reclassifications	(800)	1,512
Reclassification from AOCI, current period	198	(29)
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	207	(387)
Reclassification from AOCI, current period	(51)	8
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(593)	1,125
Reclassification from AOCI, current period	147	(21)
Other Comprehensive Income (Loss)	(446)	1,104
Amortization of Net Retirement Plan Actuarial Gain (Loss)
Before-Tax Amount
Reclassification from AOCI, current period	(25)	57
Tax (Expense) Benefit
Reclassification from AOCI, current period	7	(15)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0
Reclassification from AOCI, current period	(18)	42
Other Comprehensive Income (Loss)	(18)	42
Amortization of Defined Benefit Pension, Prior-Service Costs
Before-Tax Amount
Reclassification from AOCI, current period	52	7
Tax (Expense) Benefit
Reclassification from AOCI, current period	(15)	(1)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0
Reclassification from AOCI, current period	37	6
Other Comprehensive Income (Loss)	$ 37	$ 6