Employee Benefit and Stock Plans (Details 1) - $ / shares	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
$ 6.32 to $10.54
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	$ 11.06
Options Outstanding, Options	2,771,667
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 8.33
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 5 months 1 day
Options Exercisable, Options	2,771,667
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 8.33
$10.55 to $14.96
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	11.07
Range of Exercise Price in dollars per share, Maximum	$ 14.95
Options Outstanding, Options	3,166,036
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 14.49
Options Outstanding, Weighted Average Remaining Contractual Life	7 years 7 months 31 days
Options Exercisable, Options	1,088,448
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 13.89
$14.97 to $20.08
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	14.96
Range of Exercise Price in dollars per share, Maximum	$ 19.90
Options Outstanding, Options	2,652,671
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 17.31
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 2 months 1 day
Options Exercisable, Options	2,484,337
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 17.35
$20.09 to $33.92
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	19.91
Range of Exercise Price in dollars per share, Maximum	$ 33.92
Options Outstanding, Options	2,092,746
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 26.99
Options Outstanding, Weighted Average Remaining Contractual Life	2 years 1 month 1 day
Options Exercisable, Options	2,092,746
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 26.99
$33.93 to $69.63
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	33.93
Range of Exercise Price in dollars per share, Maximum	$ 69.63
Options Outstanding, Options	1,952,524
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 37.73
Options Outstanding, Weighted Average Remaining Contractual Life	2 years 6 months 31 days
Options Exercisable, Options	1,952,524
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 37.73
$ 6.32 to $69.63
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	$ 69.63
Options Outstanding, Options	12,635,644.000
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 19.39
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 8 months 15 days
Options Exercisable, Options	10,389,722.000
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 20.35
Options Exercisable, Weighted Average Remaining Contractual Life		3 years 9 months 1 day