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Consolidated Statement Of Stockholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement of Stockholders' Equity [Abstract] |  |  |
Issuance of common stock (in shares) | 185,020 | 274,177 | 239,854
Issuance of deferred stock units (in shares) |  |  | 63,677
Repurchases of common stock (in shares) | 402,570 | 402,570 |
Special cash dividend, per share | $ 2.55 | $ 2.35 | $ 2.05

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