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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 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 six months ended June 30, 2017 and 2016.
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
|  | (In thousands, except per share amounts)
Weighted average basic common shares outstanding |  | 20,516 |  |  | 21,057 |  |  | 20,604 |  |  | 21,753 |
Dilutive effect of employee stock purchases, net of assumed repurchase of treasury stock |  | 6 |  |  | 13 |  |  | 5 |  |  | 9 |
Weighted average dilutive common shares outstanding |  | 20,522 |  |  | 21,070 |  |  | 20,609 |  |  | 21,762 |
Basic: |  |  |  |  |  |  |  |
Net Income |  | $ | 39,133 |  |  | $ | 46,580 |  |  | $ | 73,072 |  |  | $ | 80,871 |
Less: Earnings allocated to participating securities |  | 1,389 |  |  | 1,885 |  |  | 2,645 |  |  | 3,224 |
Earnings available to basic common shares |  | $ | 37,744 |  |  | $ | 44,695 |  |  | $ | 70,427 |  |  | $ | 77,647 |
Basic earnings per common share |  | $ | 1.84 |  |  | $ | 2.12 |  |  | $ | 3.42 |  |  | $ | 3.57 |
Diluted: |  |  |  |  |  |  |  |
Net Income |  | $ | 39,133 |  |  | $ | 46,580 |  |  | $ | 73,072 |  |  | $ | 80,871 |
Less: Earnings allocated to participating securities |  | 1,389 |  |  | 1,884 |  |  | 2,645 |  |  | 3,223 |
Earnings available to diluted common shares |  | $ | 37,744 |  |  | $ | 44,696 |  |  | $ | 70,427 |  |  | $ | 77,648 |
Diluted earnings per common share |  | $ | 1.84 |  |  | $ | 2.12 |  |  | $ | 3.42 |  |  | $ | 3.57 |

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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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