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Employee Benefit and Stock Plans (Stock Option Transactions) (Details) - $ / shares
 12 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2019
Stock Options      
Options outstanding at beginning of year (in shares) 2,462,714 4,163,481 7,237,544
Options outstanding at beginning of year, Weighted Average Exercise Price in dollars per share (in dollars per share) $ 15.32 $ 13.00 $ 16.02
Granted (in shares) 0 0 0
Granted, Weighted Average Exercise Price (in dollars per share) $ 0 $ 0 $ 0
Exercised (in shares) (788,321) (1,694,767) (2,300,004)
Exercised, Weighted Average Exercise Price (in dollars per share) $ 14.83 $ 9.52 $ 13.27
Cancelled (in shares) 0 (6,000) (774,059)
Cancelled, Weighted Average Exercise Price (in dollars per share) $ 0 $ 45.16 $ 40.43
Options outstanding at end of year (in shares) 1,674,393 2,462,714 4,163,481
Options outstanding at end of year, Weighted Average Exercise Price in dollars per share (in dollars per share) $ 15.56 $ 15.32 $ 13.00
Options exercisable at end of year (in shares) 1,674,393 2,462,714 4,163,481
Options exercisable at end of period, Weighted Average Exercise Price (in dollars per share) $ 15.56 $ 15.32 $ 13.00
Options available for grant at end of year (in shares) 4,096,427 4,888,526 5,567,467