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Earnings (Loss) Per Share (Tables)
 6 Months Ended
Jun. 30, 2016
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Earnings Per Share
Basic and diluted EPS (in thousands, except per share amounts):
 
 
Quarters Ended
June 30,
 
Six Months Ended
June 30,
 
2016
 
2015
 
2016
 
2015
Net income (loss)
$
(8,347
)
 
$
(27,781
)
 
$
(23,518
)
 
$
(52,250
)
Weighted average common shares outstanding used to compute basic EPS
36,755

 
36,106

 
36,637

 
36,105

Dilutive effect of stock based awards
—

 
—

 
—

 
—

Weighted average common shares outstanding used to compute diluted EPS
36,755

 
36,106


36,637


36,105

 
 
 
 
 
 
 
 
Basic EPS
$
(0.23
)
 
$
(0.77
)
 
$
(0.64
)
 
$
(1.45
)
Diluted EPS
$
(0.23
)
 
$
(0.77
)
 
$
(0.64
)
 
$
(1.45
)