Annual report pursuant to Section 13 and 15(d)

Per Share Information (Details)

v2.4.0.6
Per Share Information (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
NET INCOME:                      
Net income attributable to common stock $ 66,314 $ 51,994 $ 31,801 $ (17,594) $ 33,666 $ 62,780 $ 32,986 $ 23,744 $ 132,515 $ 153,176 $ 162,162
Net income attributable to common stock for diluted earnings per share                 $ 132,515 $ 153,176 $ 162,162
WEIGHTED AVERAGE SHARES:                      
Weighted average shares outstanding for basic earnings per share                 212,648 210,046 200,733
Effect of dilutive stock options                 126 218 192
Effect of shares in escrow                 394 1,532 386
Weighted average shares outstanding for diluted earnings per share                 213,168 211,796 201,311