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Income Taxes (Details) - USD ($)
3 Months Ended 9 Months Ended 10 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2021
Aug. 31, 2020
Dec. 31, 2020
Nov. 30, 2020
Income Tax Expense (Benefit), Continuing Operations [Abstract]            
Income tax expense $ 24,100,000 $ 22,900,000 $ 80,900,000 $ 47,800,000    
Effective tax rate 13.80% 22.60% 17.20% 20.10%    
Net (increase) reduction in valuation allowance $ 300,000          
Excess tax benefits related to stock-based compensation     $ (3,900,000) $ (5,600,000)    
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount 2,500,000 $ 1,200,000 5,800,000 3,200,000    
Income Taxes Receivable, Alternative Minimum Tax, CARES Act   39,300,000        
Tax credits (21,500,000) (3,100,000) (39,000,000) (10,100,000)    
Deferred tax assets 213,100,000   213,100,000     $ 249,100,000
Valuation allowance 18,300,000   18,300,000     18,000,000
Deferred Tax Assets, Tax Credit Carryforwards 0 $ 82,617,000 0 82,617,000    
Adjustments to deferred tax valuation allowance     0      
Gross unrecognized tax benefits (including interest and penalties) 900,000   900,000     0
CARES Act Employee Retention Credit     4,300,000      
Income Tax Contingency [Line Items]            
Share-based Payment Arrangement, Expense, Tax Benefit     3,900,000 $ 5,600,000    
Net (increase) reduction in valuation allowance 300,000          
Gross unrecognized tax benefits (including interest and penalties) $ 900,000   $ 900,000     $ 0
Maximum [Member]            
Income Tax Contingency [Line Items]            
RefundableTaxCreditAllowedPerEmployeeCARESAct         $ 5,000