Other Comprehensive Income (Loss) - Changes in the components of other comprehensive income and loss (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities: Pre-Tax Amount
Net change in unrealized gains (losses) on debt securities	$ 58,868	$ (125,634)	$ (19,433)
Less: reclassification adjustment from amortization of securities transferred from AFS to HTM (1)	(328)	(382)	(326)
Reclassification adjustment for losses (gains) realized in income	(24,643)
Net change	33,897	(126,016)	(19,759)
Debt Securities: Tax (Expense) Benefit
Change in fair value	(14,775)	31,534	4,878
Less: reclassification adjustment from amortization of securities transferred from AFS to HTM (1)	82	96	82
Less: reclassification adjustment for net realized losses (2)	6,185
Net change	(8,508)	31,630	4,960
Debt Securities: After-Tax Amount
Change in fair value	44,093	(94,100)	(14,555)
Less: reclassification adjustment from amortization of securities transferred from AFS to HTM (1)	(246)	(286)	(244)
Less: reclassification adjustment for net realized losses (2)	(18,458)
Net change	25,389	(94,386)	(14,799)
Cash Flow Hedges: Pre-Tax Amount
Net change in unrealized gain (losses) on cash flow hedging derivatives	176
Less: reclassified AOCI gain (loss) into interest expense (3)	(473)
Net change	(297)
Cash Flow Hedges: Tax (Expense) Benefit
Change in fair value	(59)
Less: reclassified AOCI gain (loss) into interest expense (3)	119
Net change	60
Cash Flow Hedges: After-Tax Amount
Gains (Losses) Recognized in Other Comprehensive Income (Loss)	117
Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	(354)
Net change	(237)
Other Derivatives: Pre-Tax Amount
Change in fair value	(241)		(125)
Net change	(241)		(125)
Other Derivatives: Tax (Expense) Benefit
Change in fair value	75		31
Net change	75		31
Other Derivatives: After-Tax Amount
Change in fair value	(166)		(94)
Net change	(166)		(94)
Total other comprehensive income (loss), before tax	33,359	(126,016)	(19,884)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Total	(8,373)	31,630	4,991
Other comprehensive income (loss), net of tax	$ 24,986	$ (94,386)	$ (14,893)

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