Stock Benefit Plans and Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Nov. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares Underlying Stock Options, Outstanding at November 30, 2011	15,964
Number of Shares Underlying Stock Options, Granted	193
Number of Shares Underlying Stock Options, Exercised	(3,560)
Number of Shares Underlying Stock Options, Forfeited or expired	(398)
Number of Shares Underlying Stock Options, Outstanding at November 30, 2012	12,199
Number of Shares Underlying Stock Options, Vested and expected to vest at November 30, 2012	11,973
Number of Shares Underlying Stock Options, Exercisable at November 30, 2012	10,488
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Outstanding at November 30, 2011	$ 10.16
Weighted-Average Exercise Price, Granted	$ 24.21
Weighted-Average Exercise Price, Exercised	$ 9.00
Weighted-Average Exercise Price, Forfeited or expired	$ 18.63
Weighted-Average Exercise Price, Outstanding at November 30, 2012	$ 10.45
Weighted-Average Exercise Price, Vested and expected to vest at November 30, 2012	$ 10.48
Weighted-Average Exercise Price, Exercisable at Outstanding, Exercisable at November 30, 2012	$ 7.78
Weighted-Average Remaining Contractual Term, Outstanding at November 30, 2012	2 years 5 months 35 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest at November 30, 2012 (in years)	2 years 5 months 15 days
Weighted-Average Remaining Contractual Term, Exercisable at November 30, 2012 (in years)	2 years 0 months 28 days
Aggregate Intrinsic Value, Outstanding at November 30, 2012	$ 180,399
Aggregate Intrinsic Value, Vested and expected to vest at November 30, 2012	179,799
Aggregate Intrinsic Value, Exercisable at November 30, 2012	$ 172,886