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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2014
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,
 
2014
 
2013
 
2014
 
2013
Net income (loss)
$
(21,029
)
 
$
(18,471
)
 
$
(28,799
)
 
$
(30,145
)
Weighted average common shares outstanding used to compute basic EPS
35,890

 
35,455

 
35,865

 
35,399

Dilutive effect of stock based awards
—

 
—

 
—

 
—

Weighted average common shares outstanding used to compute diluted EPS
35,890

 
35,455


35,865


35,399

Basic EPS
$
(0.59
)
 
$
(0.52
)
 
$
(0.80
)
 
$
(0.85
)
Diluted EPS
$
(0.59
)
 
$
(0.52
)
 
$
(0.80
)
 
$
(0.85
)