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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | --- | --- | --- | --- | ---
Statement of Stockholders' Equity [Abstract] |  |  |  |  |  |  |  |
Unvested restricted shares (in shares) | 41,424 | 41,424 | 41,424 | 11,924 | 44,568 | 44,568 | 47,572 | 35,572
Dividends payable (in dollars per share) | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 | $ 0.11 |

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