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Basis of Presentation and Significant Accounting Policies (Narratives) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2019 | Aug. 31, 2018 | Nov. 30, 2018 | Dec. 01, 2018
Cash equivalents | $ 11,400 |  | $ 11,400 |  | $ 385,200 |
Other comprehensive income (loss) | 68,100 | $ 87,500 | 145,600 | $ 73,500 |  |
Retained earnings | 2,042,034 |  | 2,042,034 |  | 1,897,168 | $ 1,908,778
Customer deposits | 26,800 |  | 26,800 |  | $ 19,500 |
Financial Service [Member] |  |  |  |  |  |
Contract assets | 20,100 |  | 20,100 |  |  | 19,700
Home Building [Member] | Product Concentration Risk [Member] | Total Revenues [member] |  |  |  |  |  |
Percentage of total revenue |  |  |  |  | 99.70% |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |
Retained earnings | $ 10,387 |  | $ 10,387 |  |  | 11,610
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Financial Service [Member] |  |  |  |  |  |
Contract assets |  |  |  |  |  | $ 19,728

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