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Earnings Per Common Share (Tables) | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share Basic and Diluted |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Numerator—basic and diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 26,547 |  |  | $ | 21,709 |  |  | $ | 56,728 |  |  | $ | 45,395 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding — basic |  |  | 40,820 |  |  |  | 40,792 |  |  |  | 40,663 |  |  |  | 40,607 |
Effect of dilutive stock options |  |  | 316 |  |  |  | 451 |  |  |  | 223 |  |  |  | 414 |
Effect of dilutive restricted shares |  |  | 463 |  |  |  | 453 |  |  |  | 487 |  |  |  | 508 |
Weighted average number of common shares outstanding — diluted |  |  | 41,599 |  |  |  | 41,696 |  |  |  | 41,373 |  |  |  | 41,529 |
Earnings per common share — basic |  | $ | 0.65 |  |  | $ | 0.53 |  |  | $ | 1.40 |  |  | $ | 1.12 |
Earnings per common share — diluted |  | $ | 0.64 |  |  | $ | 0.52 |  |  | $ | 1.37 |  |  | $ | 1.09 |
Antidilutive stock options and restricted shares |  |  | 1,374 |  |  |  | 1,524 |  |  |  | 2,016 |  |  |  | 1,849 |

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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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