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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

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