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Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2017 USD ($) property lot delivery | Feb. 29, 2016 USD ($) property lot delivery | Nov. 30, 2016 USD ($) property
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impairment of Real Estate | $ 3,217,000 | $ 1,346,000 | $ 49,600,000
Number of Land Parcels or Communities Associated with Non Cash Inventory Impairment Charges | property | 2 |  |
Number of land parcels or communities evaluated for recoverability | property | 39 | 20 |
Carrying Value of Communities or Land Parcels Evaluated for Impairment | $ 366,400,000 | $ 179,400,000 |
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges | $ 205,500,000 |  | $ 215,300,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | 27 |  | 28
Land Option Contract Abandonment Lots | lot | 386 | 180 |
Maximum [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Fair Value Estimate Input at Average Selling Price | $ 307,900 | $ 310,000 |
Fair Value Estimate Input, Delivery For Period | delivery | 4 | 1 |
Fair Value Inputs, Discount Rate | 17.00% | 17.00% |
Minimum [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Fair Value Estimate Input at Average Selling Price | $ 299,800 | $ 310,000 |
Fair Value Estimate Input, Delivery For Period | delivery | 3 | 1 |
Fair Value Inputs, Discount Rate | 17.00% | 17.00% |
Land Option Contract Abandonment [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Payments to Acquire Land | $ (791,000) | $ (620,000) |
West Coast [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impairment of Real Estate | 0 | 0 |
West Coast [Member] | Land Option Contract Abandonment [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Payments to Acquire Land | (791,000) | (160,000) |
Central [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impairment of Real Estate | 0 | 787,000 |
Central [Member] | Land Option Contract Abandonment [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Payments to Acquire Land | 0 | (460,000) |
Southeast [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impairment of Real Estate | 1,874,000 | 559,000 |
Southeast [Member] | Land Option Contract Abandonment [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Payments to Acquire Land | $ 0 | $ 0 |

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