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Inventory Impairments and Land Option Contract Abandonments (Details)
 12 Months Ended
Nov. 30, 2016
USD ($)
lot
community
delivery
property
Nov. 30, 2015
USD ($)
lot
community
delivery
property
Nov. 30, 2014
USD ($)
lot
delivery
property
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impairment of Real Estate $ 49,580,000 $ 8,030,000 $ 37,628,000
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts 56,000,000 65,600,000  
Carrying Value of Communities of Land Parcels Evaluated for Impairment $ 423,100,000 $ 286,300,000 $ 266,900,000
Number of land parcels or communities associated with non cash inventory impairment charges | property 30 4 8
Number of land parcels or communities evaluated for recoverability | property 68 35 32
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges $ 215,300,000 $ 254,200,000  
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community 28 28  
Number of Lots on which abandonment charges are recognized | lot 744 1,166 1,306
Remaining useful life in addition to specified useful lives 1 year    
Specified period of remaining useful lives 10 years    
Expected realization period of inventory maximum 5 years    
Land Held for Sale [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impairment of Real Estate $ 36,700,000    
Land Held for Future Development [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impairment of Real Estate 12,900,000 $ 11,000,000  
Land [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impairment of Real Estate   $ 26,600,000  
Number of land parcels or communities associated with non cash inventory impairment charges | property   2  
Communities [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Number of land parcels or communities associated with non cash inventory impairment charges | property   6  
Minimum      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value Estimate Input at Average Selling Price [1] $ 216,200 $ 178,100 $ 216,100
Fair Value Estimate Input at Sales for Period | delivery [1] 1 2 1
Fair Value Inputs, Discount Rate [1] 17.00% 17.00% 17.00%
Maximum      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Fair Value Estimate Input at Average Selling Price [1] $ 977,400 $ 509,400 $ 316,800
Fair Value Estimate Input at Sales for Period | delivery [1] 4 4 4
Fair Value Inputs, Discount Rate [1] 20.00% 20.00% 19.00%
Estimate of Fair Value Measurement [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Assets, Fair Value Disclosure $ 39,500,000 $ 12,000,000 $ 30,600,000
Land Option Contract Abandonment [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Loss on Contract Termination 3,232,000 1,561,000 1,803,000
West Coast [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impairment of Real Estate 8,209,000 645,000 27,285,000
West Coast [Member] | Land Option Contract Abandonment [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Loss on Contract Termination 769,000 352,000 554,000
Southeast [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impairment of Real Estate 27,547,000 4,132,000 3,951,000
Southeast [Member] | Land Option Contract Abandonment [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Loss on Contract Termination 1,750,000 $ 984,000 $ 254,000
Metro Washington, D.C. [Member] | Southeast [Member] | Land Option Contract Abandonment [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Loss on Contract Termination $ 1,400,000    
[1] The ranges of inputs used in each period primarily reflect differences between the housing markets where each of the impacted communities are located, rather than fluctuations in prevailing market conditions.