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Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
May 31, 2018 USD ($) lot delivery | May 31, 2017 USD ($) delivery | May 31, 2018 USD ($) lot delivery property | May 31, 2017 USD ($) delivery property | Nov. 30, 2017 USD ($) property
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Real Estate Inventory, Capitalized Interest Costs, Cost of Sales | [1] | $ 52,433,000 | $ 50,471,000 | $ 94,783,000 | $ 89,855,000 |
Impairment of Real Estate |  | 5,993,000 | 4,302,000 | $ 10,692,000 | $ 7,519,000 |
Number of land parcels or communities evaluated for recoverability | property |  |  |  | 42 | 43 |
Carrying Value of Communities or Land Parcels Evaluated for Impairment |  | 284,100,000 | 381,100,000 | $ 284,100,000 | $ 381,100,000 |
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges |  | $ 169,800,000 |  | $ 169,800,000 |  | $ 177,800,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges |  | 18 |  | 18 |  | 24
Maximum [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Estimate Input at Average Selling Price |  | $ 460,500 | $ 399,800 | $ 774,100 | $ 399,800 |
Fair Value Estimate Input, Delivery For Period | delivery |  | 5 | 4 | 5 | 4 |
Fair Value Inputs, Discount Rate |  | 17.00% | 18.00% | 18.00% | 18.00% |
Minimum [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Fair Value Estimate Input at Average Selling Price |  | $ 339,400 | $ 231,000 | $ 339,400 | $ 231,000 |
Fair Value Estimate Input, Delivery For Period | delivery |  | 4 | 3 | 3 | 3 |
Fair Value Inputs, Discount Rate |  | 17.00% | 18.00% | 17.00% | 17.00% |
Land Option Contract Abandonment [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Payments to Acquire Land |  | $ (533,000) | $ (1,699,000) | $ (819,000) | $ (2,490,000) |
West Coast [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Impairment of Real Estate |  | 5,993,000 | 3,144,000 | 10,692,000 | 3,144,000 |
West Coast [Member] | Land Option Contract Abandonment [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Payments to Acquire Land |  | (388,000) | (1,044,000) | (596,000) | (1,835,000) |
Central [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Impairment of Real Estate |  | 0 | 0 | 0 | 0 |
Central [Member] | Land Option Contract Abandonment [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Payments to Acquire Land |  | (145,000) | (518,000) | (223,000) | (518,000) |
Southeast [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Impairment of Real Estate |  | 0 | 1,158,000 | 0 | 3,032,000 |
Southeast [Member] | Land Option Contract Abandonment [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Payments to Acquire Land |  | 0 | (137,000) | 0 | (137,000) |
Land [Member] |  |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |
Real Estate Inventory, Capitalized Interest Costs, Cost of Sales |  | $ 3,100,000 | $ 1,100,000 | $ 4,100,000 | $ 1,600,000 |
[1] | Interest amortized to construction and land costs for the three months ended May 31, 2018 and 2017 included $3.1 million and $1.1 million, respectively, related to land sales during those periods.

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