Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	$ 27,960	$ 28,694	$ 86,436	$ 94,228
Income tax benefit	(7,041)	(7,712)	(22,154)	(25,513)
Net of tax	20,919	20,982	64,282	68,715
Accumulated Other Comprehensive Income (Loss) Components
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(339)	785	(807)	(2,518)
Income tax benefit	95	(83)	226	840
Net of tax	(244)	702	(581)	(1,678)
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment for gain included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions	0	2,296	210	2,015
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)	$ (1,017)	$ (4,533)