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Investments in Unconsolidated Joint Ventures (Financial Information for Unconsolidated Joint Ventures) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Aug. 31, 2013
Aug. 31, 2012
Nov. 30, 2012
Statements of operations of unconsolidated joint venture          
Revenues $ 5,552 $ 27,859 $ 11,908 $ 27,859  
Construction and land costs (3,463) (19,309) (7,391) (19,303)  
Other expenses, net (1,183) (442) (3,074) (1,189)  
Income (loss) 906 8,108 1,443 7,367  
Assets          
Cash 22,332   22,332   29,721
Receivables 7,763   7,763   6,104
Inventories 359,180   359,180   352,791
Other assets 1,183   1,183   1,175
Total assets 390,458   390,458   389,791
Liabilities and equity          
Accounts payable and other liabilities 85,722   85,722   88,027
Equity 304,736   304,736   301,764
Total liabilities and equity $ 390,458   $ 390,458   $ 389,791