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Stockholders' Equity Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2018
Stockholders' Equity Note [Abstract] |
Schedule of Share Repurchases | Our repurchase activity is as follows:
| Nine months ended September 30, |  | Inception to date
| 2018 | 2017 |
Program | Shares | Total $ | $ per share | Shares | Total $ | $ per share |  | Shares | Total $ | $ per share
Open market | 116,289 |  | $ | 3,839,766 |  | $ | 33.02 |  | 8,676 |  | $ | 283,654 |  | $ | 32.69 |  |  | 3,959,784 |  | $ | 65,071,881 |  | $ | 16.43 |
401(k) | 373,129 |  | 13,660,954 |  | 36.61 |  | 364,839 |  | 12,706,655 |  | 34.83 |  |  | 6,923,152 |  | 95,729,759 |  | 13.83 |
Directors and employees | 24,457 |  | 859,696 |  | 35.15 |  | 33,845 |  | 1,193,337 |  | 35.26 |  |  | 1,943,967 |  | 18,137,729 |  | 9.33 |
Total | 513,875 |  | $ | 18,360,416 |  | $ | 35.73 |  | 407,360 |  | $ | 14,183,646 |  | $ | 34.82 |  |  | 12,826,903 |  | $ | 178,939,369 |  | $ | 13.95 |
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 |
May 18, 2018 | June 8, 2018 | July 6, 2018 | $ | 0.16 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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