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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Assets [Abstract] |  |
Securities to be held to maturity, fair value | $ 377,134 | $ 287,045
Stockholders' Equity Note [Abstract] |  |
Common stock, par value (usd per share) | $ 0.01 | $ 0.01

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