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Consolidated Balance Sheets - (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Investment securities available for sale, amortized cost	$ 1,789,416	$ 1,129,255
Allowance for credit losses	256	167
Time deposits	$ 100	$ 100
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, issued (in shares)	31,947,458	31,779,663
Common stock, outstanding (in shares)	31,947,458	31,779,663

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Amount of time deposit liabilities, including certificates of deposit, in denominations of $100,000 or more.

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