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