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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
Schedule of Stock Repurchased and Retired | Share repurchases under this authorization were as follows:
|  | Repurchases Occurring in the Three Months Ended March 31, 2018 |  | Cumulative Repurchases as of March 31, 2018
|  | Shares |  | Average Price |  | Shares |  | Average Price
2016 Share Repurchase Authorization |  | 50,000 |  |  | $ | 99.02 |  |  | 1,092,725 |  |  | $ | 84.55 |

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- Definition Tabular disclosure of stock repurchased and retired during the period. + References No definition available. + Details
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- References No definition available. + Details
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