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Other Comprehensive (Loss) Income - Changes in accumulated other comprehensive income (loss), net of tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Securities, Available-for-sale [Abstract]
Beginning balance	$ 1,252,720	$ 1,306,336	$ 1,350,775	$ 1,240,892
Other comprehensive (loss) before reclassifications	(60,029)	(5,703)	(151,169)	(15,897)
Amounts reclassified from accumulated other comprehensive income (loss)	(3)	(1,133)	114	(1,919)
Net unrealized (loss) on securities transferred to held-to-maturity			49,095
Amortization of unrealized loss on securities transferred to held-to-maturity	1,762		3,753
Other comprehensive (loss)	(58,270)	(6,836)	(196,397)	(17,816)
Ending balance	1,219,771	1,331,697	1,219,771	1,331,697
Securities Available For Sale
Debt Securities, Available-for-sale [Abstract]
Beginning balance	(105,265)	4,804	(13,958)	16,168
Other comprehensive (loss) before reclassifications	(60,029)	(5,703)	(151,453)	(16,666)
Amounts reclassified from accumulated other comprehensive income (loss)	(3)	(1,133)	114	(1,534)
Net unrealized (loss) on securities transferred to held-to-maturity			0
Amortization of unrealized loss on securities transferred to held-to-maturity	0		0
Other comprehensive (loss)	(60,032)	(6,836)	(151,339)	(18,200)
Ending balance	(165,297)	(2,032)	(165,297)	(2,032)
Securities Held to Maturity
Debt Securities, Available-for-sale [Abstract]
Beginning balance	(47,104)	0	0	0
Other comprehensive (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Net unrealized (loss) on securities transferred to held-to-maturity			49,095
Amortization of unrealized loss on securities transferred to held-to-maturity	1,762		3,753
Other comprehensive (loss)	1,762	0	(45,342)	0
Ending balance	(45,342)	0	(45,342)	0
Derivatives
Debt Securities, Available-for-sale [Abstract]
Beginning balance	0	(284)	(284)	(668)
Other comprehensive (loss) before reclassifications	0	0	284	769
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	(385)
Net unrealized (loss) on securities transferred to held-to-maturity			0
Amortization of unrealized loss on securities transferred to held-to-maturity	0		0
Other comprehensive (loss)	0	0	284	384
Ending balance	0	(284)	0	(284)
Accumulated Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale [Abstract]
Beginning balance	(152,369)	4,520	(14,242)	15,500
Other comprehensive (loss)	(58,270)	(6,836)	(196,397)	(17,816)
Ending balance	$ (210,639)	$ (2,316)	$ (210,639)	$ (2,316)

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Other Comprehensive Income (Loss), Held-to-Maturity Securities Adjustment, Net of Tax

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