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Inventories (Schedule of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2012
Nov. 30, 2011
Inventories    
Homes under construction $ 528,532 $ 417,304
Land under development 545,423 587,582
Land held for future development 695,088 726,743
Total $ 1,769,043 $ 1,731,629