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Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Net Earnings Per Share | The computations of basic earnings per share and diluted earnings per share are as follows:
|  | Three Months Ended March 31, 2016
| Income (Numerator) |  | Shares (Denominator) |  | Per-share Amount
| Net income | $ | 18,626,000 |  |  |  |  |
| Basic earnings per common share | $ | 18,626,000 |  |  | 72,364,000 |  |  | $ | 0.26 |
| Effect of dilutive securities: |  |  |  |  |
| Stock options and restricted stock |  |  | 650,000 |  |  | — |
| Diluted earnings per common share | $ | 18,626,000 |  |  | 73,014,000 |  |  | $ | 0.26 |
|  | Three Months Ended March 31, 2015
| Income (Numerator) |  | Shares (Denominator) |  | Per-share Amount
| Net income | $ | 15,516,000 |  |  |  |  |
| Basic earnings per common share | $ | 15,516,000 |  |  | 71,469,000 |  |  | $ | 0.22 |
| Effect of dilutive securities: |  |  |  |  |
| Stock options and restricted stock |  |  | 690,000 |  |  | — |
| Diluted earnings per common share | $ | 15,516,000 |  |  | 72,159,000 |  |  | $ | 0.22 |

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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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