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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, 2014
Aug. 31, 2013
Aug. 31, 2014
Aug. 31, 2013
Nov. 30, 2013
Statements of operations of unconsolidated joint venture          
Revenues $ 0 $ 5,552 $ 6,118 $ 11,908  
Construction and land costs 0 (3,463) (3,523) (7,391)  
Other expenses, net (1,050) (1,183) (3,088) (3,074)  
Income (loss) (1,050) 906 (493) 1,443  
Assets          
Cash 22,040   22,040   18,752
Receivables 4,872   4,872   4,902
Inventories 148,899   148,899   381,195
Other assets 149   149   1,183
Total assets 175,960   175,960   406,032
Liabilities and equity          
Accounts payable and other liabilities 11,973   11,973   85,386
Equity 163,987   163,987   320,646
Total liabilities and equity $ 175,960   $ 175,960   $ 406,032