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Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details) (USD $)
 3 Months Ended 12 Months Ended
Feb. 28, 2014
property
lot
Feb. 28, 2013
property
Nov. 30, 2013
property
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts $ 34,700,000   $ 31,000,000
Number of land parcels or communities evaluated for recoverability 11 20  
Pretax, noncash inventory impairment charges 0 0 400,000
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges 284,500,000   293,100,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges 39   42
Land Option Contract Abandonment Charges 433,000 0  
Land Option Contract Abandonment Lots Associated with Projects Less Than $100,000 3,380    
Land Option Contract Abandonment Lots 650    
Remaining useful life in addition to specified useful lives (in years) 1 year    
Specified period of remaining useful lives (in years) 10 years    
Expected Realization Period of Inventory (in years) 5 years    
Estimate of Fair Value, Fair Value Disclosure [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Post impairment fair value     1,100,000
Maximum [Member]
      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts     $ 100,000