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Supplemental Disclosure to Consolidated Statements of Cash Flows (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
May 31, 2012
May 31, 2012
May 31, 2011
Summary of cash and cash equivalents at end of period:      
Total $ 317,961 $ 317,961 $ 627,196
Supplemental disclosure of cash flow information      
Interest paid, net of amounts capitalized   28,711 22,544
Income taxes paid   647 226
Income taxes refunded 4,100 4,376 182
Supplemental disclosure of noncash activities:      
Increase (decrease) in consolidated inventories not owned   (3,611) 12,813
Acquired property securing note receivable     40,000
Homebuilding [Member]
      
Summary of cash and cash equivalents at end of period:      
Total 314,258 314,258 621,304
Financial services [Member]
      
Summary of cash and cash equivalents at end of period:      
Total $ 3,703 $ 3,703 $ 5,892