Comprehensive (Loss) Income - Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Before-Tax Amount
Other comprehensive (loss) income, before tax	$ (26,203)	$ (1,427)	$ (66,388)	$ (3,901)
Tax (Expense) Benefit
Other comprehensive (loss) income, tax	6,697	366	16,971	998
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(20,023)	(1,096)	(50,027)	(3,015)
Reclassification from AOCI, current period	517	35	610	112
Other Comprehensive Loss	(19,506)	(1,061)	(49,417)	(2,903)
Unrealized Gains and Losses on Available for Sale Securities
Before-Tax Amount
OCI, before reclassifications	(27,945)	(1,719)	(70,945)	(5,333)
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	7,144	440	18,137	1,364
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(20,801)	(1,279)	(52,808)	(3,969)
Reclassification from AOCI, current period	0	0	0	0
Other Comprehensive Loss	(20,801)	(1,279)	(52,808)	(3,969)
Unrealized Loss on Cash Flow Swap
Before-Tax Amount
OCI, before reclassifications	1,046	245	3,737	1,281
Reclassification from AOCI, current period	75	(34)	57	(92)
Tax (Expense) Benefit
Other comprehensive (loss) income before reclassifications, tax	(268)	(62)	(956)	(327)
Reclassification from AOCI, current period	(20)	9	(15)	24
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	778	183	2,781	954
Reclassification from AOCI, current period	55	(25)	42	(68)
Other Comprehensive Loss	833	158	2,823	886
Amortization of Net Retirement Plan Actuarial Gain (Loss)
Before-Tax Amount
Reclassification from AOCI, current period	564	22	592	68
Tax (Expense) Benefit
Reclassification from AOCI, current period	(144)	(5)	(151)	(17)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0	0	0
Reclassification from AOCI, current period	420	17	441	51
Other Comprehensive Loss	420	17	441	51
Amortization of Defined Benefit Pension, Prior-Service Costs
Before-Tax Amount
Reclassification from AOCI, current period	57	59	171	175
Tax (Expense) Benefit
Reclassification from AOCI, current period	(15)	(16)	(44)	(46)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0	0	0
Reclassification from AOCI, current period	42	43	127	129
Other Comprehensive Loss	$ 42	$ 43	$ 127	$ 129