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Basis of Presentation and Significant Accounting Policies (Impacts of Adopting ASC 606) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2020 | Aug. 31, 2019 | Dec. 01, 2019 | Nov. 30, 2019 | Dec. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |  |
Lease right-of-use assets | $ 33,291 |  | $ 33,291 |  |  |  |
Total revenues | 999,013 | $ 1,160,786 | 2,988,918 | $ 2,994,072 |  |  |
Total pretax income | 101,315 | 91,936 | 237,952 | 183,208 |  |  |
Income tax expense | (22,900) | (23,800) | (47,800) | (37,600) |  |  |
Net income | $ 78,415 | $ 68,136 | $ 190,152 | $ 145,608 |  |  |
Diluted earnings per share (in dollars per share) | $ 0.83 | $ 0.73 | $ 2.02 | $ 1.55 |  |  |
Assets |  |  |  |  |  |  |
Inventories | $ 3,671,129 |  | $ 3,671,129 |  |  | $ 3,704,602 |
Property and equipment, net | 64,619 |  | 64,619 |  |  | 65,043 |
Total assets | 5,177,427 |  | 5,177,427 |  |  | 5,015,482 |
Stockholders’ equity: |  |  |  |  |  |  |
Retained earnings | 2,326,060 |  | 2,326,060 |  |  | 2,157,183 |
Financial Service [Member] |  |  |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |  |
Lease right-of-use assets | 300 |  | 300 |  |  |  |
Contract assets | 21,600 |  | 21,600 |  |  | 20,600 |
Total revenues | 3,865 | $ 3,931 | 11,108 | $ 9,758 |  |  |
Selling, general and administrative expenses | (1,056) | (1,003) | (2,901) | (3,067) |  |  |
Operating income | 2,809 | 2,928 | 8,207 | 6,691 |  |  |
Total pretax income | 9,664 | 6,644 | 23,081 | 13,709 |  |  |
Assets |  |  |  |  |  |  |
Total assets | 34,761 |  | 34,761 |  |  | 38,396 |
Home Building [Member] |  |  |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |  |
Lease right-of-use assets | 32,992 |  | 32,992 |  |  | 0 |
Total revenues | 995,148 | 1,156,855 | 2,977,810 | 2,984,314 |  |  |
Construction and land costs | (798,495) | (943,754) | (2,429,001) | (2,458,353) |  |  |
Selling, general and administrative expenses | (107,710) | (127,626) | (348,082) | (357,048) |  |  |
Operating income | 88,943 | 85,475 | 200,727 | 168,913 |  |  |
Total pretax income | 91,651 | 85,292 | 214,871 | 169,499 |  |  |
Assets |  |  |  |  |  |  |
Inventories | 3,671,129 |  | 3,671,129 |  |  | 3,704,602 |
Deferred tax assets, net | 241,171 |  | 241,171 |  |  | 364,493 |
Property and equipment, net | 64,619 |  | 64,619 |  |  | 65,043 |
Total assets | $ 5,142,666 |  | $ 5,142,666 |  |  | $ 4,977,086 |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |  |
Lease right-of-use assets |  | $ 0 |  | $ 0 | $ 31,199 |  |
Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  | $ (35,288)
Property and equipment, net |  |  |  |  |  |  | $ 31,194

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