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Supplemental Disclosure to Consolidated Statements of Cash Flows (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Nov. 30, 2012
Summary of cash and cash equivalents at end of period:      
Cash and cash equivalents $ 386,465 $ 423,124 $ 525,688
Supplemental disclosures of cash flow information:      
Interest paid, net of amounts capitalized 34,902 53,359  
Income taxes paid 623 723  
Income taxes refunded 61 6,217  
Supplemental disclosures of noncash activities:      
Increase (decrease) in consolidated inventories not owned 4,831 (3,861)  
Cost of inventories acquired through seller financing 27,600 53,625  
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures 8,346 0  
Homebuilding
      
Summary of cash and cash equivalents at end of period:      
Cash and cash equivalents 383,314 420,392 524,765
Financial Services
      
Summary of cash and cash equivalents at end of period:      
Cash and cash equivalents $ 3,151 $ 2,732 $ 923