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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Phantom and restricted stock issuances (in shares) | 211,328 | 200,688 | 110,825
Stock options exercised (in shares) |  | 77,334 | 27,619
Share repurchase (in shares) |  | 2,250,236 | 1,752,454
Common stock issued upon exchange of convertible securities (in shares) | 31,800 |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 0.3225 | $ 0.255 | $ 0.250

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