Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details)	3 Months Ended
	Feb. 29, 2020 $ / shares shares
Options
Options outstanding at beginning of period, options (in shares) | shares	4,163,481
Granted, options (in shares) | shares	0
Exercised, options (in shares) | shares	(698,372)
Cancelled, options (in shares) | shares	(6,000)
Options outstanding at end of period, options (in shares) | shares	3,459,109
Options exercisable at end of period (in shares) | shares	3,459,109
Weighted Average Exercise Price in dollars per share
Options outstanding at beginning of period, weighted average exercise price (in dollars per share) | $ / shares	$ 13.00
Granted, weighted average exercise price (in dollars per share) | $ / shares	0
Exercised, weighted average exercise price (in dollars per share) | $ / shares	11.78
Cancelled, weighted average exercise price (in dollars per share) | $ / shares	45.16
Options outstanding at end of period, weighted average exercise price (in dollars per share) | $ / shares	13.20
Options exercisable at end of period (in dollars per share) | $ / shares	$ 13.20