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Securities - Realized Gain (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Securities
Proceeds from sales of securities	$ 605,846	$ 18,006	$ 191,298
Gross realized gains on securities	270	17	5,521
Gross realized losses on securities	(38)	(42)	(1,010)
Net realized gains (losses)	232	(25)	4,511
Income tax (expense) benefit on net realized gains (losses)	$ (65)	$ 7	$ (1,267)
Effective tax rate applied (as a percent)	28.00%	28.00%	28.10%

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- Definition

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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