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Earnings per share (Tables)
 12 Months Ended
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 )