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Stock-Based Compensation (Tables)
 6 Months Ended
May 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Outstanding and Exercisable Stock Options
The following table summarizes stock option transactions for the six months ended May 31, 2019:
 
Options
 
Weighted
Average Exercise
Price
Options outstanding at beginning of period
7,237,544

 
$
16.02

Granted
—

 
—

Exercised
(1,097,927
)
 
14.95

Cancelled
(30,000
)
 
38.24

Options outstanding at end of period
6,109,617

 
$
16.11

Options exercisable at end of period
5,820,743

 
$
16.10