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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Basic and Diluted Earnings per share | The following table sets forth the calculation of EPS for the three and nine months ended September 30, 2017 and 2016.
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
|  | (In thousands, except per share amounts)
Weighted average basic common shares outstanding |  | 20,222 |  |  | 20,568 |  |  | 20,475 |  |  | 21,355 |
Dilutive effect of employee stock purchases, net of assumed repurchase of treasury stock |  | 3 |  |  | 10 |  |  | 5 |  |  | 9 |
Weighted average dilutive common shares outstanding |  | 20,225 |  |  | 20,578 |  |  | 20,480 |  |  | 21,364 |
Basic: |  |  |  |  |  |  |  |
Net Income |  | $ | 29,881 |  |  | $ | 35,366 |  |  | $ | 102,953 |  |  | $ | 116,237 |
Less: Earnings allocated to participating securities |  | 1,024 |  |  | 1,427 |  |  | 3,660 |  |  | 4,652 |
Earnings available to basic common shares |  | $ | 28,857 |  |  | $ | 33,939 |  |  | $ | 99,293 |  |  | $ | 111,585 |
Basic earnings per common share |  | $ | 1.43 |  |  | $ | 1.65 |  |  | $ | 4.85 |  |  | $ | 5.23 |
Diluted: |  |  |  |  |  |  |  |
Net Income |  | $ | 29,881 |  |  | $ | 35,366 |  |  | $ | 102,953 |  |  | $ | 116,237 |
Less: Earnings allocated to participating securities |  | 1,023 |  |  | 1,426 |  |  | 3,659 |  |  | 4,651 |
Earnings available to diluted common shares |  | $ | 28,858 |  |  | $ | 33,940 |  |  | $ | 99,294 |  |  | $ | 111,586 |
Diluted earnings per common share |  | $ | 1.43 |  |  | $ | 1.65 |  |  | $ | 4.85 |  |  | $ | 5.22 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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