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Earnings Per Share
 12 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
The calculation of basic and diluted EPS follows. 
 
Year ended December 31,
 
2011
 
2010 (1)
 
(In thousands, except per-share amounts)
Basic EPS:
 
 
 
Numerator:
 
 
 
Net income
$
157,191

 
$
232,456

Income attributable to unvested participating securities
(4,906
)
 
(9,408
)
Net income used in calculating basic EPS
$
152,285

 
$
223,048

Denominator:
 
 
 
Weighted-average vested shares
72,283

 
72,099

Basic EPS
$
2.11

 
$
3.09

 
 
 
 
Diluted EPS:
 
 
 
Numerator:
 
 
 
Net income
$
157,191

 
$
232,456

Income attributable to unvested participating securities
(4,855
)
 
(9,312
)
Net income used in calculating diluted EPS
$
152,336

 
$
223,144

Denominator:
 
 
 
Weighted-average vested shares
73,107

 
72,882

Diluted EPS
$
2.08

 
$
3.06

____________________
(1) Pro forma basis using weighted-average shares, including the shares issued or issuable upon lapse of restrictions following our April 1, 2010 corporate reorganization as though they had been issued and outstanding on January 1, 2010.