Other Comprehensive Income - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, net of tax	$ 17,629	$ (146,794)	$ (13,180)
Reclassification, net of tax	(83)	724	2,966
Net change before tax	26,345	(202,036)	(13,891)
Net change, tax	(8,799)	55,966	3,677
Other comprehensive income (loss), net	17,546	(146,070)	(10,214)
Unrealized Gains and Losses on AFS Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	19,514	(189,201)	(32,586)
Before reclassification, tax	(6,564)	52,220	8,973
Before reclassification, net of tax	12,950	(136,981)	(23,613)
Reclassification adjustment before tax	(863)	(31)	(663)
Reclassification, tax	229	8	172
Reclassification, net of tax	(634)	(23)	(491)
Net change before tax	18,651	(189,232)	(33,249)
Net change, tax	(6,335)	52,228	9,145
Other comprehensive income (loss), net	12,316	(137,004)	(24,104)
Unrealized Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	(1,093)	4,683	138
Before reclassification, tax	336	(1,321)	(11)
Before reclassification, net of tax	(757)	3,362	127
Reclassification adjustment before tax	891	274	3,436
Reclassification, tax	(253)	(71)	(989)
Reclassification, net of tax	638	203	2,447
Net change before tax	(202)	4,957	3,574
Net change, tax	83	(1,392)	(1,000)
Other comprehensive income (loss), net	(119)	3,565	2,574
Net change
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, net of tax	5,436	(13,175)	10,306
Reclassification, net of tax	(87)	544	1,010
Net change before tax	7,896	(17,761)	15,784
Net change, tax	(2,547)	5,130	(4,468)
Other comprehensive income (loss), net	5,349	(12,631)	11,316
Net gains (losses) arising during the period
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassification, before tax	8,027	(18,531)	14,381
Before reclassification, tax	(2,591)	5,356	(4,075)
Before reclassification, net of tax	5,436	(13,175)	10,306
Amortization of prior service (cost) credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment before tax	(135)	(135)	(135)
Reclassification, tax	45	35	39
Reclassification, net of tax	(90)	(100)	(96)
Amortization of net loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment before tax	4	905	1,538
Reclassification, tax	(1)	(261)	(432)
Reclassification, net of tax	$ 3	$ 644	$ 1,106