Annual report pursuant to Section 13 and 15(d)

Per Share Information - Basic and Diluted Earnings Per Share (Detail)

v2.4.0.6
Per Share Information - Basic and Diluted Earnings Per Share (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
AMOUNTS ATTRIBUTABLE TO COMMON STOCK:                      
Net income from continuing operations $ 102,350 $ 83,628 $ 57,918 $ 45,798 $ 58,715 $ 44,256 $ 28,674 $ (13,134) $ 289,694 $ 118,511 $ 142,693
Net income from discontinued operations                 16,935 14,004 10,483
Net income attributable to common stock $ 98,986 $ 96,398 $ 65,538 $ 45,707 $ 66,314 $ 51,994 $ 31,801 $ (17,594) $ 306,629 $ 132,515 $ 153,176
WEIGHTED AVERAGE SHARES:                      
Weighted average shares outstanding for basic earnings per share                 212,777 212,648 210,046
Effect of dilutive stock options                 58 126 218
Effect of shares in escrow                   394 1,532
Weighted average shares outstanding for diluted earnings per share                 212,835 213,168 211,796