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Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 31, 2014 property lot | Aug. 31, 2013 property lot | Aug. 31, 2014 property lot | Aug. 31, 2013 lot property | Nov. 30, 2013 property
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts | $ 50,100,000 |  | $ 50,100,000 |  | $ 31,000,000
Number of land parcels or communities evaluated for recoverability | 20 | 16 | 42 | 54 |
Pretax, noncash inventory impairment charges | (3,408,000) | 0 | (3,408,000) | 0 | (400,000)
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges | 292,000,000 |  | 292,000,000 |  | 293,100,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | 34 |  | 34 |  | 42
Land Option Contract Abandonment Lots Associated with Projects Less Than $100,000 |  |  | 7,018 | 4,681 |
Land Option Contract Abandonment Lots | 624 | 0 | 1,306 | 82 |
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 |  |
Maximum [Member] |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts | 100,000 |  | 100,000 |  |
Land Option Contract Abandonment [Member] |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Payments to Acquire Land | $ (1,013,000) | $ 0 | $ (1,803,000) | $ (284,000) |

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
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