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Income Taxes - Narrative (Details) - USD ($) | 3 Months Ended | 10 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 28, 2021 | May 31, 2020 | Feb. 29, 2020 | Dec. 31, 2020 | Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2019 | Aug. 31, 2020 | Nov. 30, 2018
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Effective income tax rate (in percent) |  |  |  |  | 18.80% | 18.60% | 22.80% |  |
Income tax credits and adjustments |  |  |  |  | $ 49,500,000 | $ 18,700,000 | $ 4,300,000 |  |
Tax benefits from share-based compensation |  |  |  |  | 7,100,000 | 12,000,000 | 5,300,000 |  |
Nondeductible expense |  |  |  |  | 11,300,000 | 5,700,000 | 5,300,000 |  |
Net Increase (decrease) in valuation allowance recorded against net deferred tax assets |  |  |  |  | 600,000 | 4,400,000 | 4,400,000 |  |
Valuation allowance for deferred tax assets |  |  |  |  | $ (600,000) | $ (1,200,000) | $ (4,400,000) |  |
Income tax benefit computed at statutory rate (percent) |  |  |  |  | 21.00% | 21.00% | 21.00% |  |
Income tax receivable due to AMT tax credit |  | $ 39,300,000 | $ 43,300,000 |  |  |  |  |  |
AMT credit refund |  |  |  |  |  |  |  | $ 43,300,000 |
AMT credit carryforwards |  |  |  |  | $ 4,634,000 | $ 75,108,000 |  |  |
CARES Act employee retention credit | $ 4,300,000 |  |  |  |  |  |  |  |
Deferred tax assets |  |  |  |  | 257,477,000 | 320,666,000 |  |  |
Valuation allowance |  |  |  |  | $ 17,400,000 | 18,000,000 |  |  |
Period for carry forward of tax benefits related to deferred tax assets |  |  |  |  | 20 years |  |  |  |
Expired state and local loss carryforwards |  |  |  |  | $ 200,000 | 400,000 |  |  |
Tax credit carryforwards |  |  |  |  | 4,600,000 |  |  |  |
Unrecognized tax benefits that would impact effective tax rate |  |  |  |  |  | 0 | $ 0 |  |
Amount of unrecorded benefit from significant change in unrecognized tax benefits is reasonably possible |  |  |  |  | 0 | 0 |  |  |
Total accrued interest and penalties related to unrecognized income tax benefits |  |  |  |  | 0 | 0 |  |  |
Deferred tax asset, net |  |  |  |  | (194,800,000) | (249,100,000) |  |  |
Unrecognized tax benefits |  |  |  |  | 930,000 | 0 | 0 |  | $ 0
State and Local Jurisdiction |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Valuation allowance for deferred tax assets |  |  |  |  |  | $ 1,200,000 | $ 1,900,000 |  |
Operating loss carryforwards |  |  |  |  | 73,700,000 |  |  |  |
Tax Credit Carryforward, Expiring in 2038 |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Future income from continuing operations before income taxes |  |  |  |  | $ 670,000,000 |  |  |  |
Maximum |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Refundable tax credit allowed per employee CARES act |  |  |  | $ 5,000 |  |  |  |  |

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