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Earnings (Loss) Per Common Share (Tables)
 3 Months Ended
Mar. 31, 2017
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 earnings per share and diluted earnings per share computations (amounts in thousands, except per share data):
 
Three months ended March 31,
 
2017
 
2016
Numerator (both basic and diluted):
 
 
 
Net loss
$
(25,124
)
 
$
(27,699
)
Denominator:
 
 
 
Weighted-average shares (denominator for basic earnings (loss) per share)
77,072

 
64,576

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

 
—

Denominator for diluted earnings (loss) per share
77,072

 
64,576

Loss per common share—Basic
$
(0.33
)
 
$
(0.43
)
Loss per common share—Diluted
$
(0.33
)
 
$
(0.43
)
Potentially dilutive securities excluded as anti-dilutive
4,944

 
5,909