Other Comprehensive Income - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, net of tax	$ (146,794)	$ (13,180)	$ 22,176
Reclassification, net of tax	724	2,966	2,320
Net change before tax	(202,036)	(13,891)	32,844
Net change, tax	55,966	3,677	(8,348)
Other comprehensive (loss) income, net	(146,070)	(10,214)	24,496
Unrealized Gains and Losses on AFS Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	(189,201)	(32,586)	38,477
Before reclassification, tax	52,220	8,973	(10,632)
Before reclassification, net of tax	(136,981)	(23,613)	27,845
Reclassification adjustment before tax	(31)	(663)	(524)
Reclassification, tax	8	172	147
Reclassification, net of tax	(23)	(491)	(377)
Net change before tax	(189,232)	(33,249)	37,953
Net change, tax	52,228	9,145	(10,485)
Other comprehensive (loss) income, net	(137,004)	(24,104)	27,468
Unrealized Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	4,683	138	(3,169)
Before reclassification, tax	(1,321)	(11)	918
Before reclassification, net of tax	3,362	127	(2,251)
Reclassification adjustment before tax	274	3,436	2,912
Reclassification, tax	(71)	(989)	(838)
Reclassification, net of tax	203	2,447	2,074
Net change before tax	4,957	3,574	(257)
Net change, tax	(1,392)	(1,000)	80
Other comprehensive (loss) income, net	3,565	2,574	(177)
Net change
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, net of tax	(13,175)	10,306	(3,418)
Reclassification, net of tax	544	1,010	623
Net change before tax	(17,761)	15,784	(4,852)
Net change, tax	5,130	(4,468)	2,057
Other comprehensive (loss) income, net	(12,631)	11,316	(2,795)
Net (losses) gains arising during the period
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	(18,531)	14,381	(5,719)
Before reclassification, tax	5,356	(4,075)	2,301
Before reclassification, net of tax	(13,175)	10,306	(3,418)
Amortization of prior service (cost) credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment before tax	(135)	(135)	(136)
Reclassification, tax	35	39	38
Reclassification, net of tax	(100)	(96)	(98)
Amortization of net loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment before tax	905	1,538	1,003
Reclassification, tax	(261)	(432)	(282)
Reclassification, net of tax	$ 644	$ 1,106	$ 721