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Consolidated Statements of Changes in Shareholders' Equity (unaudited) (Parenthetical) - $ / shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Forfeiture of restricted stock award grants (in shares) | 2,699 |  | 2,699 | 130
Performance-based restricted stock award (in shares) | 798 |  | 798 |
Cash dividends declared (in dollars per share) | $ 0.17 | $ 0.165 | $ 0.51 | $ 0.50
Restricted stock award grants (in shares) |  |  | 39,790 | 37,708
Purchase of treasury stock (in shares) |  |  | 40,000 | 10,769
Restricted Stock |  |  |  |
Purchase of treasury stock (in shares) | 217 |  | 9,305 | 6,119
Performance Shares |  |  |  |
Purchase of treasury stock (in shares) | 294 |  | 294 |

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