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Supplemental Disclosure to Consolidated Statements of Cash Flows (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Aug. 31, 2012
Aug. 31, 2012
Aug. 31, 2011
Summary of cash and cash equivalents at end of period:      
Total cash and cash equivalents $ 423,124 $ 423,124 $ 480,273
Supplemental disclosures of cash flow information:      
Interest paid, net of amounts capitalized   53,359 52,251
Income taxes paid   723 278
Income taxes refunded 1,800 6,217 182
Supplemental disclosures of noncash activities:      
Increase (decrease) in consolidated inventories not owned   (3,861) 9,596
Acquired property securing note receivable   0 40,000
Cost of inventories acquired through seller financing   53,625 0
Homebuilding
      
Summary of cash and cash equivalents at end of period:      
Total cash and cash equivalents 420,392 420,392 477,406
Financial Services
      
Summary of cash and cash equivalents at end of period:      
Total cash and cash equivalents $ 2,732 $ 2,732 $ 2,867