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Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions | Dec. 15, 2019 | Nov. 20, 2019
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Dividend per common stock |  | $ 0.1425
Virginia Community Bankshares, Inc [Member] |  |
Cash paid per share | $ 58.00 |
Shares issued per share | $ 3.05 |
Percentage of stock issued under business combination | 60.00% |
Percentage of cash paid under business combination | 40.00% |
Number of shares expected to issue | 1,312,970 |
Expected payments under business combination | $ 16.6 |

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