Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Nov. 30, 2021
Aug. 31, 2021
May 31, 2021
Feb. 28, 2021
Nov. 30, 2020
Aug. 31, 2020
May 31, 2020
Feb. 29, 2020
Nov. 30, 2019
Aug. 31, 2019
May 31, 2019
Feb. 28, 2019
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2019
Jul. 08, 2021
Jul. 07, 2021
Jul. 17, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Purchase price for right holders (per right) $ 85.00                       $ 85.00          
Calendar days after a public announcement during which rights to be exercised                         10 days          
Business days after the commencement of a tender or exchange offer during which rights to be exercised                         10 days          
Beneficially ownership in company's outstanding common stock to be held by person or group to exercise rights                         4.90%          
Price at which company may redeem all of the then outstanding rights (per right) $ 0.001                       $ 0.001          
Stock repurchases                         $ 188,175          
Shares of common stock authorized (in shares) 290,000,000       290,000,000               290,000,000 290,000,000        
Shares of common stock issued (in shares) 100,711,153       99,868,625               100,711,153 99,868,625        
Cash dividends paid per common share (in dollars per share) $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.09 $ 0.09 $ 0.09 $ 0.09 $ 0.09 $ 0.025 $ 0.025            
Value of treasury stock acquired                         $ 12,337 $ 9,503 $ 7,288      
Cash dividends declared per common share (in dollars per share) $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.09 $ 0.09 $ 0.09 $ 0.09 $ 0.09 $ 0.025 $ 0.025            
Retirement of treasury stock, shares                           23,487,966        
Director Plan SARs                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Authorized repurchase of common stock (in shares)                                   680,000
Shares of common stock authorized (in shares)                                   680,000
Shares of common stock issued (in shares) 0                       0          
Treasury Stock                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Stock repurchases (in shares)                         4,669,000          
Stock repurchases                         $ 188,175          
Value of treasury stock acquired                         $ 12,337 $ 9,503 7,288      
Retirement of treasury stock, shares                           (23,488,000)        
Stock Repurchased During Period, Shares                         4,668,600          
Stock Repurchased During Period, Value                         $ 188,200          
July 2021 Stock Repurchase Program                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Authorized repurchase of common stock (in shares)                               5,000,000    
Remaining authorized number of shares available for repurchases 331,400                       331,400          
May 2018 Stock Repurchase Program                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Remaining authorized number of shares available for repurchases                                 2,193,947  
Not Part of a Share Repurchase Program                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Value of treasury stock acquired                         $ 12,300 $ 9,500 $ 7,300