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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Shares outstanding | 19,337,662 |  |
Common stock options exercised and related tax benefits, shares | 18,660 |  |
Issuance of shares for Employee Stock Purchase Plan, shares | 18,740 | 29,273 | 25,404
Share repurchase, share | (739,778) |  |
Shares outstanding | 18,926,810 | 19,337,662 |
Common Stock [Member] |  |  |
Shares outstanding | 19,337,662 | 18,619,634 | 17,257,995
Restricted stock units issued, shares | 144,026 | 90,771 | 74,936
Restricted stock awards forfeitures, shares | (40,197) | (94,034) | (479)
Restricted stock repurchased on vesting to pay taxes, shares |  | (45,404) | (58,598)
Cash dividends declared on common stock, per share | $ 0.20 | $ 0.20 | $ 0.20
Common stock options exercised and related tax benefits, shares | 18,660 | 23,148 | 50,473
Common stock options exercised, used to exercise, shares |  | 2,374 | 8,764
Common stock options exercised, net of shares used to exercise, shares |  | 20,774 | 41,709
Sales of shares (Dividend Reinvestment Program), shares |  | 542,302 | 1,204,710
Issuance of shares for Employee Stock Purchase Plan, shares | 18,740 | 29,273 | 25,404
Share repurchase, share | (739,778) |  |
Issuance of shares for Employee's Savings and Investment plan, shares |  | 34,449 | 30,123
Issuance of common stock for acquisition, shares | 184,806 | 139,897 | 43,834
Exercise of warrants, shares | 7,109 |  |
Exercise of warrants, used to exercise, shares | 4,218 |  |
Exercise of warrants, net of shares used to exercise, shares | 2,891 |  |
Shares outstanding | 18,926,810 | 19,337,662 | 18,619,634

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