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Other Comprehensive Income - Changes in accumulated other comprehensive income (loss), net of tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Securities, Available-for-sale [Abstract]
Beginning balance	$ 1,350,775	$ 1,240,892
Other comprehensive income (loss) before reclassifications		(17,044)
Amounts reclassified from accumulated other comprehensive income	19	(454)
Other comprehensive income (loss)	(107,482)	(17,498)
Ending balance	1,279,554	1,260,833
Securities Available For Sale
Debt Securities, Available-for-sale [Abstract]
Beginning balance	(13,958)	16,168
Other comprehensive income (loss) before reclassifications		(17,617)
Amounts reclassified from accumulated other comprehensive income	19	(166)
Other comprehensive income (loss)	(58,387)	(17,783)
Ending balance	(72,345)	(1,615)
Securities Held to Maturity
Debt Securities, Available-for-sale [Abstract]
Beginning balance	0	0
Other comprehensive income (loss) before reclassifications	(49,095)	0
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive income (loss)	(49,095)	0
Ending balance	(49,095)	0
Derivatives
Debt Securities, Available-for-sale [Abstract]
Beginning balance	(284)	(668)
Other comprehensive income (loss) before reclassifications	0	573
Amounts reclassified from accumulated other comprehensive income	0	(288)
Other comprehensive income (loss)	0	285
Ending balance	(284)	(383)
Accumulated Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale [Abstract]
Beginning balance	(14,242)	15,500
Other comprehensive income (loss)	(107,482)	(17,498)
Ending balance	$ (121,724)	$ (1,998)

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