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Earnings/(Loss) Per Share (Tables)
 6 Months Ended
Jun. 30, 2012
Earnings Per Share [Abstract]  
Loss per share
The following table sets forth the computation of basic and diluted earnings/(loss) per share for the periods presented (amounts in thousands, except per share data):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
Numerator for earnings per share — basic and diluted:
 
 
 
 
 
 
 
Net income/(loss) attributable to common stockholders
$
145,721

 
$
12,149

 
$
226,569

 
$
(18,094
)
Denominator for earnings per share — basic and diluted:
 
 
 
 
 
 
 
Weighted average common shares outstanding
234,657

 
191,758

 
228,697

 
187,832

Non-vested restricted stock awards
(626
)
 
(1,279
)
 
(931
)
 
(1,305
)
Denominator for basic and diluted earnings per share
234,031

 
190,479

 
227,766

 
186,527

Net income/(loss) attributable to common stockholders - basic and diluted
$
0.62

 
$
0.06

 
$
0.99

 
$
(0.10
)