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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Net Income (Loss) Per Share
The following table sets forth the computation of basic and diluted earnings per share:
 
 
Years ended December 31:
 
 
2011
 
2012
 
2013
 
 
(In thousands, except per share data)
Numerator:
 
 
 
 
 
 
Net income (loss)
 
$
13,743

 
$
(18,791
)
 
$
38,647

Denominator:
 
 

 
 

 
 

Denominator for basic earnings per share – weighted-average common shares outstanding
 
90,151

 
91,914

 
92,451

Effect of dilutive securities:
Stock options, restricted shares and warrants
 
2,093

 
—

 
1,087

Denominator for diluted earnings per share – adjusted weighted-average shares and assumed exercise of options, restricted shares and warrants
 
92,244

 
91,914

 
93,538

 
 
 
 
 
 
 
Net income (loss) per common share  – basic
 
$
0.15

 
$
(0.20
)
 
$
0.42

 
 
 
 
 
 
 
Net income (loss) per common share – diluted
 
$
0.15

 
$
(0.20
)
 
$
0.41