Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	$ 30,917	$ 36,622	$ 58,476	$ 65,534
Income tax benefit	(7,958)	(9,934)	(15,113)	(17,801)
Net of tax	22,959	26,688	43,363	47,733
Accumulated Other Comprehensive Income (Loss) Components
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(129)	(1,792)	(468)	(3,303)
Income tax benefit	37	501	132	923
Net of tax	(92)	(1,291)	(336)	(2,380)
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment for gain (loss) included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (loss) on securities transactions	210	(281)	210	(281)
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment of actuarial net (loss) included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-interest expense, net	$ (339)	$ (1,511)	$ (678)	$ (3,022)