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Summary Of Significant Accounting Policies (Repurchase of Company's Common Stock) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Class A Common Stock    
Class of Stock [Line Items]    
Shares repurchased (in shares) 13,910,000 4,250,000
Principal $ 1,357,081 $ 282,274
Average price per share (in usd per share) $ 97.56 $ 66.42
Class B Common Stock    
Class of Stock [Line Items]    
Shares repurchased (in shares) 100,000 115,000
Principal $ 8,197 $ 6,155
Average price per share (in usd per share) $ 81.97 $ 53.52