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Earnings per share (Tables) | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Schedule of Computations of Basic and Diluted Earnings Per Share | The computations of basic and diluted earnings (loss) per share as of December 31, 2015, 2014 and 2013, were as follows:
|  | 2015 |  |  | 2014 |  |  | 2013 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 14,278 |  |  | $ | 23,726 |  |  | $ | (18,760 | )
Change in the value of Private Placement Warrants |  |  | (9,299 | ) |  |  | (6,169 | ) |  |  | — |
|  | $ | 4,979 |  |  | $ | 17,557 |  |  | $ | (18,760 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding-basic |  |  | 10,808,005 |  |  |  | 10,706,780 |  |  |  | 9,779,457 |
Incremental shares from assumed exercise of Private Placement Warrants, SAR, restricted stock |  |  | 265,642 |  |  |  | 424,837 |  |  |  | — |
Weighted average common shares outstanding-diluted |  |  | 11,073,647 |  |  |  | 11,131,617 |  |  |  | 9,779,457 |
Earnings (loss) per share of common stock — basic and diluted: |  |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share of common stock — basic |  | $ | 1.32 |  |  | $ | 2.22 |  |  | $ | (1.92 | )
Earnings (loss) per share of common stock — diluted |  | $ | 0.45 |  |  | $ | 1.58 |  |  | $ | (1.92 | )

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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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