Employee Benefit and Stock Plans - Stock Options Outstanding and Exercisable (Details)	12 Months Ended
	Nov. 30, 2020 $ / shares shares
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 6.32
Range of Exercise Price in dollars per share, Maximum	$ 29.51
Options Outstanding, Options | shares	2,462,714
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 15.32
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 6 months
Options Exercisable, Options | shares	2,462,714
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 15.32
$6.32 to $14.62
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	6.32
Range of Exercise Price in dollars per share, Maximum	$ 14.62
Options Outstanding, Options | shares	808,187
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 14.52
Options Outstanding, Weighted Average Remaining Contractual Life	3 years 9 months 18 days
Options Exercisable, Options | shares	808,187
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 14.52
Range Two [Member]
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	14.63
Range of Exercise Price in dollars per share, Maximum	$ 14.92
Options Outstanding, Options | shares	723,000
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 14.92
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 10 months 24 days
Options Exercisable, Options | shares	723,000
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 14.92
Range Three [Member]
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	14.93
Range of Exercise Price in dollars per share, Maximum	$ 16.21
Options Outstanding, Options | shares	644,527
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 16.21
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 9 months 18 days
Options Exercisable, Options | shares	644,527
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 16.21
Range Four [Member]
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	16.22
Range of Exercise Price in dollars per share, Maximum	$ 29.51
Options Outstanding, Options | shares	287,000
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 16.63
Options Outstanding, Weighted Average Remaining Contractual Life	2 years 10 months 24 days
Options Exercisable, Options | shares	287,000
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 16.63