Other Comprehensive Income - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, net of tax	$ (13,180)	$ 22,176	$ 35,712
Reclassification, net of tax	2,966	2,320	1,505
Net change before tax	(13,891)	32,844	53,045
Net change, tax	3,677	(8,348)	(15,828)
Other comprehensive (loss) income, net	(10,214)	24,496	37,217
Unrealized Gains and Losses on AFS Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	(32,586)	38,477	54,723
Before reclassification, tax	8,973	(10,632)	(15,461)
Before reclassification, net of tax	(23,613)	27,845	39,262
Reclassification adjustment before tax	(663)	(524)	150
Reclassification, tax	172	147	(31)
Reclassification, net of tax	(491)	(377)	119
Net change before tax	(33,249)	37,953	54,873
Net change, tax	9,145	(10,485)	(15,492)
Other comprehensive (loss) income, net	(24,104)	27,468	39,381
Unrealized Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	138	(3,169)	(1,380)
Before reclassification, tax	(11)	918	391
Before reclassification, net of tax	127	(2,251)	(989)
Reclassification adjustment before tax	3,436	2,912	1,808
Reclassification, tax	(989)	(838)	(517)
Reclassification, net of tax	2,447	2,074	1,291
Net change before tax	3,574	(257)	428
Net change, tax	(1,000)	80	(126)
Other comprehensive (loss) income, net	2,574	(177)	302
Net change
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, net of tax	10,306	(3,418)	(2,561)
Reclassification, net of tax	1,010	623	95
Net change before tax	15,784	(4,852)	(2,256)
Net change, tax	(4,468)	2,057	(210)
Other comprehensive (loss) income, net	11,316	(2,795)	(2,466)
Net gains (losses) arising during the period
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	14,381	(5,719)	(2,385)
Before reclassification, tax	(4,075)	2,301	(176)
Before reclassification, net of tax	10,306	(3,418)	(2,561)
Amortization of prior service (cost) credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment before tax	(135)	(136)	(135)
Reclassification, tax	39	38	42
Reclassification, net of tax	(96)	(98)	(93)
Amortization of net loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment before tax	1,538	1,003	264
Reclassification, tax	(432)	(282)	(76)
Reclassification, net of tax	$ 1,106	$ 721	$ 188