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Earnings Per Common Share (Tables)
12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table presents a reconciliation of the numerators and denominators of the basic income per share and diluted income per share computations (amounts in thousands, except per share data):
 
Year ended December 31,
 
2015
 
2014
 
2013
Basic
 
 
 
 
 
Net income (loss)
$
(155,140
)
 
$
(38,018
)
 
$
(35,932
)
 
 
 
 
 
 
Weighted-average shares
64,310

 
63,161

 
62,213

 
 
 
 
 
 
Income (loss) per common share—Basic
$
(2.41
)
 
$
(0.60
)
 
$
(0.58
)
 
 
 
 
 
 
Diluted
 
 
 
 
 
Net income (loss)
$
(155,140
)
 
$
(38,018
)
 
$
(35,932
)
 
 
 
 
 
 
Weighted-average shares
 
 
 
 
 
Outstanding
64,310

 
63,161

 
62,213

Diluted effect of outstanding stock options, restricted stock and restricted stock unit awards

 

 

 
64,310

 
63,161

 
62,213

 
 
 
 
 
 
Income (loss) per common share—Diluted
$
(2.41
)
 
$
(0.60
)
 
$
(0.58
)