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Earnings Per Share
 3 Months Ended
Mar. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings (Loss) Per Share
Basic net income (loss) per share (EPS) is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income (loss) by the weighted average number of common and dilutive potential common shares outstanding during the period. Basic and diluted EPS (in thousands, except per share amounts):
 
 
Quarters Ended
March 31,
 
2014
 
2013
Net income (loss) available to common shareholders
$
(7,770
)
 
$
(11,674
)
Weighted average common shares outstanding used to compute basic EPS
35,840

 
35,343

Dilutive effect of stock based awards
—

 
—

Weighted average common shares outstanding used to compute diluted EPS
35,840

 
35,343

Basic EPS
$
(0.22
)
 
$
(0.33
)
Diluted EPS
$
(0.22
)
 
$
(0.33
)

During the quarters ended March 31, 2014, and March 31, 2013, 6.1 million and 4.2 million shares of common stock, respectively, of potentially issuable shares from stock awards were excluded from the calculation of diluted EPS because of their antidilutive effect.