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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Net Earnings Per Share | The following is a reconciliation of net income and the shares of common stock used in the computation of basic and diluted net earnings per share (dollars in thousands, except per share amounts):
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 66,807 |  |  | $ | 43,840 |  |  | $ | 20,945 |
Less: income allocable to participating securities |  |  | (171 | ) |  |  | (333 | ) |  |  | (270 | )
Income allocable to common shares |  | $ | 66,636 |  |  | $ | 43,507 |  |  | $ | 20,675 |
Add back: undistributed earnings allocable to participating securities |  |  | 171 |  |  |  | 333 |  |  |  | 270 |
Less: undistributed earnings reallocated to participating securities |  |  | (168 | ) |  |  | (333 | ) |  |  | (264 | )
Numerator for diluted earnings per share |  | $ | 66,639 |  |  | $ | 43,507 |  |  | $ | 20,681 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 50,315,455 |  |  |  | 50,315,455 |  |  |  | 50,315,455 |
Weighted average common shares repurchased |  |  | (1,526,930 | ) |  |  | (286,699 | ) |  |  | — |
Adjustment for vested restricted stock |  |  | 9,050,630 |  |  |  | 7,521,448 |  |  |  | 6,179,715 |
Shares for calculating basic earnings per share |  |  | 57,839,155 |  |  |  | 57,550,204 |  |  |  | 56,495,170 |
Dilutive effect of unvested restricted stock |  |  | 950,864 |  |  |  | 1,417,895 |  |  |  | 1,424,530 |
Shares for calculating diluted earnings per share |  |  | 58,790,019 |  |  |  | 58,968,099 |  |  |  | 57,919,700 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.15 |  |  | $ | 0.76 |  |  | $ | 0.37 |
Diluted |  | $ | 1.13 |  |  | $ | 0.74 |  |  | $ | 0.36 |

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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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