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Restructuring (Schedule Of Restructuring Charges) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Restructuring and Related Activities [Abstract]      
Employee severance benefits $ 10,841 $ 24,850 $ 47,525 [1]
Lease exit costs 5,923 27,356 23,208 [1]
Other 4,089 3,929 2,283 [1]
Restructuring Charges $ 20,853 $ 56,135 $ 73,016 [1]
[1] Includes $65.4 million of restructuring costs related to the Centex merger.