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Net Income Per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share Reconciliation Table
The following summarizes the elements included in the calculation of basic and diluted net (loss) income per share for 2012, 2011 and 2010:
 
 
Year ended December 31,
 
2012
 
2011
 
2010
Net (loss) income
$
(26,169
)
 
$
48,150

 
$
190,837

Weighted average shares outstanding—Basic
164,366

 
164,256

 
155,870

Dilutive securities
—

 
8,254

 
7,616

Weighted average shares outstanding—Dilutive
164,366

 
172,510

 
163,486

Net (loss) income per common share:
 
 
 
 
 
Basic
$
(0.16
)
 
$
0.29

 
$
1.22

Diluted
$
(0.16
)
 
$
0.28

 
$
1.17