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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Computation of basic and diluted earnings per share | The following table sets forth the computation of basic and diluted earnings per share (unaudited, in thousands, except per share data):
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
Numerator: |  |  |  |  |  |  |  |
Net income |  | $ | 11,673 |  |  | $ | 13,339 |  |  | $ | 24,847 |  |  | $ | 30,127 |
Denominator: |  |  |  |  |  |  |  |
Weighted-average common shares for calculating basic earnings per share |  | 28,243 |  |  | 28,196 |  |  | 28,242 |  |  | 28,299 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock options and nonvested awards |  | — |  |  | 215 |  |  | — |  |  | 216 |
Weighted-average common shares for calculating diluted earnings per share |  | 28,243 |  |  | 28,411 |  |  | 28,242 |  |  | 28,515 |
Net income per share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.41 |  |  | $ | 0.47 |  |  | $ | 0.88 |  |  | $ | 1.06 |
Diluted |  | $ | 0.41 |  |  | $ | 0.47 |  |  | $ | 0.88 |  |  | $ | 1.06 |

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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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