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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Assets [Abstract]
Securities to be held to maturity, fair value	$ 379,797	$ 377,134	$ 342,062
Stockholders' Equity [Abstract]
Common stock par value (usd per share)	$ 0.01	$ 0.01	$ 0.01

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Face amount or stated value per share of common stock.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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