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