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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
Summary of basic and diluted earnings per share
The following table sets forth the calculations of basic and diluted earnings per share (in thousands except share amounts and per share data):

         
  
Three months ended September 30,
  
Nine months ended September 30,
 
  
2015
  
2014
  
2015
  
2014
 
Net (loss) income
 
$
(23,651
)
 
$
(63
)
 
$
(53,634
)
 
$
243
 
                 
Basic weighted-average common shares outstanding
  
28,051,066
   
27,899,505
   
28,048,808
   
27,808,231
 
Add:  dilutive effect of stock options
  
--
   
--
   
--
   
392,157
 
Add:  dilutive effect of unvested restricted stock
  
--
   
--
   
--
   
--
 
Diluted weighted-average common shares outstanding
  
28,051,066
   
27,899,505
   
28,048,808
   
28,200,388
 
                 
Basic net (loss) income per share
 
$
(0.84
)
 
$
(0.00
)
 
$
(1.91
)
 
$
0.01
 
Diluted net (loss) income per share
 
$
(0.84
)
 
$
(0.00
)
 
$
(1.91
)
 
$
0.01
 
Schedule of anti-dilutive securities
The following options and unvested restricted stock, which could be potentially dilutive in future periods, were not included in the computation of diluted net loss per share because the effect would have been anti-dilutive for the periods indicated:

         
  
Three months ended September 30,
  
Nine months ended September 30,
 
  
2015
  
2014
  
2015
  
2014
 
Weighted-average anti-dilutive stock options
  
2,616,790
   
1,067,341
   
2,615,542
   
1,059,176
 
Weighted-average anti-dilutive restricted stock awards
  
334,189
   
--
   
239,829
   
--
 
   
2,950,979
   
1,067,341
   
2,855,371
   
1,059,176