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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Schedule of Stock Repurchases | The following table details our stock repurchases under the 2015 Stock Repurchase Program:
| Year Ended December 31,
| 2016 |  | 2015
Shares of common stock repurchased and retired | 85 |  |  | 765 |
Average price per share | $ | 34.16 |  |  | $ | 34.68 |
Total cost | $ | 2,902 |  |  | $ | 26,516 |
The following table details our stock repurchases under the Repurchase Program:
| Year Ended December 31,
| 2017 |  | 2016
Shares of common stock repurchased and retired | 4,674 |  |  | 452 |
Average price per share | $ | 35.94 |  |  | $ | 41.06 |
Total cost | $ | 168,001 |  |  | $ | 18,577 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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