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Basis of Presentation and Significant Accounting Policies (Narrative) (Details) (USD $)
 12 Months Ended 0 Months Ended
Nov. 30, 2013
Rate
Nov. 30, 2012
Rate
Nov. 30, 2011
Rate
Nov. 30, 2013
Minimum
Nov. 30, 2013
Maximum
Jun. 30, 2011
KBA Mortgage
Jan. 29, 2013
Convertible senior notes due February 1, 2019 at 1.375%
Jan. 29, 2013
Convertible senior notes due February 1, 2019 at 1.375%
Convertible Notes Payable [Member]
Debt Instrument [Line Items]                
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (17,516,000) $ (27,958,000)            
Defined Benefit Plan, Amortization of Gains (Losses) (1,800,000) 1,400,000 600,000          
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 1,500,000 1,600,000 1,500,000          
Other comprehensive loss before reclassifications 7,083,000 (4,765,000) (5,646,000)          
Debt Instrument, Face Amount               230,000,000
Debt Instrument, Interest Rate, Stated Percentage             1.375%  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 5,200,000              
Other Comprehensive Income (Loss), Net of Tax 10,442,000 (1,806,000) (3,495,000)          
Debt Conversion, Converted Instrument, Shares Issued               36.5297
Cash equivalents 436,200,000 396,300,000            
Restricted Cash and Cash Equivalents 41,906,000 42,362,000            
Homebuilding Closing Costs Allowances 10,600,000 14,500,000 27,100,000          
Homebuilding Closing Costs Allowances as a Percentage of Housing Revenues 0.50% 0.90% 2.10%          
Schedule of Equity Method Investments [Line Items]                
Ownership interest in joint venture           50.00%    
Estimated useful life for depreciation of property and equipment       2 years 10 years      
Property and equipment amount 8,460,000 7,920,000            
Accumulated depreciation 14,400,000 18,500,000            
Depreciation expense 1,857,000 1,622,000 2,031,000          
Advertising costs incurred 25,300,000 24,600,000 32,400,000          
Expensed legal fees $ 10,100,000 $ 12,600,000 $ 16,900,000