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Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share Basic and Diluted |
|  | Three Months Ended March 31, |
|  | 2016 |  |  | 2015 |
Numerator—basic and diluted |  |  |  |  |  |  |  |
Net income |  | $ | 30,181 |  |  | $ | 23,686 |
Denominator |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding — basic |  |  | 40,506 |  |  |  | 40,384 |
Effect of dilutive stock options |  |  | 131 |  |  |  | 376 |
Effect of dilutive restricted shares |  |  | 511 |  |  |  | 564 |
Weighted average number of common shares outstanding — diluted |  |  | 41,148 |  |  |  | 41,324 |
Earnings per common share — basic |  | $ | 0.75 |  |  | $ | 0.59 |
Earnings per common share — diluted |  | $ | 0.73 |  |  | $ | 0.57 |
Antidilutive stock options and restricted shares |  |  | 2,657 |  |  |  | 2,173 |

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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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