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Stockholders' Equity Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of Share Repurchases | Our repurchase activity is as follows:
| Three Months Ended March 31, | Inception to date
| 2018 | 2017
Program | Shares | Total $ | $ per share | Shares | Total $ | $ per share | Shares | Total $ | $ per share
Open market | — |  | $ | — |  | $ | — |  | 6,100 |  | $ | 195,993 |  | $ | 32.13 |  | 3,843,495 |  | $ | 61,232,115 |  | $ | 15.93 |
401(k) | 118,203 |  | 4,378,925 |  | 37.05 |  | 176,429 |  | 6,107,515 |  | 34.62 |  | 6,668,226 |  | 86,447,730 |  | 12.96 |
Directors and employees | 15,492 |  | 559,688 |  | 36.13 |  | 16,399 |  | 559,605 |  | 34.12 |  | 1,935,002 |  | 17,845,721 |  | 9.22 |
Total | 133,695 |  | $ | 4,938,613 |  | $ | 36.94 |  | 198,928 |  | $ | 6,863,113 |  | $ | 34.50 |  | 12,446,723 |  | $ | 165,525,566 |  | $ | 13.30 |
Schedule of Dividends Payable | Our recent dividends are as follows:
Declaration Date | Record Date | Payment Date | Dividend per Share
May 16, 2017 | June 9, 2017 | July 7, 2017 | $ | 0.13 |
November 7, 2017 | November 30, 2017 | December 21, 2017 | $ | 0.13 |

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- Definition Tabular disclosure of all or some of the information related to dividends declared, but not paid, as of the financial reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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