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Consolidated Financial Statements (Tables)
 6 Months Ended
Jun. 30, 2012
Consolidated Financial Statements [Abstract]  
Reconciliation of the numerator and denominator used in computing the basic and diluted net (loss) income per share
The following represents a reconciliation of the numerator and denominator used in computing basic and diluted net (loss) income per share available to common stockholders for the three and six months ended June 30, 2012 and 2011:
 
    
 
 
Three Months Ended
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2012

2011
 
2012
 
2011
Income (numerator)
 
 

 
 

 
 
 
 
Net (loss) income
 
$
(12,589
)
 
$
7,019

 
$
(10,770
)
 
$
87

Shares (denominator)
 
 

 
 

 
 
 
 
Weighted average basic common shares outstanding
 
92,767

 
92,069

 
92,625

 
91,978

Effect of dilutive securities-stock rights
 
—

 
496

 
—

 
540

Weighted average diluted common shares outstanding
 
92,767

 
92,565

 
92,625

 
92,518

Basic and diluted per share amounts
 
 

 
 

 
 
 
 
Basic net (loss) income per share
 
$
(0.14
)
 
$
0.08

 
$
(0.12
)
 
$
0.00

Diluted net (loss) income per share
 
$
(0.14
)
 
$
0.08

 
$
(0.12
)
 
$
0.00