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Earnings per share (Tables) | 9 Months Ended
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Sep. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Computations of Basic and Diluted Earnings Per Share | The computations of basic and diluted earnings per share for the three and nine months ended September 30, 2015 and 2014, were as follows:
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 9,109 |  |  | $ | 7,148 |  |  | $ | 12,574 |  |  | $ | 13,405 |
Change in the value of Private Placement Warrants |  |  | (8,750 | ) |  |  | (858 | ) |  |  | (8,040 | ) |  |  | (1,190 | )
|  | $ | 359 |  |  | $ | 6,290 |  |  | $ | 4,534 |  |  | $ | 12,215 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding-basic |  |  | 10,814,765 |  |  |  | 10,794,229 |  |  |  | 10,804,720 |  |  |  | 10,676,792 |
Incremental shares from assumed exercise of Private Placement Warrants, SAR and restricted stock, if applicable |  |  | 254,160 |  |  |  | 373,369 |  |  |  | 316,001 |  |  |  | 448,324 |
Weighted average common shares outstanding-diluted |  |  | 11,068,925 |  |  |  | 11,167,598 |  |  |  | 11,120,721 |  |  |  | 11,125,116 |
Earnings per share of common stock – basic and diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings per share of common stock – basic |  | $ | 0.84 |  |  | $ | 0.66 |  |  | $ | 1.16 |  |  | $ | 1.26 |
Earnings per share of common stock – diluted |  | $ | 0.03 |  |  | $ | 0.56 |  |  | $ | 0.41 |  |  | $ | 1.10 |

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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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