Incentive Plans and Stock-Based Compensation (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Nov. 30, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number (in shares)	2,208,314
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 40.76
Options Outstanding - Intrinsic Value	$ 43,667
Options Outstanding - Weighted Average Remaining Life (in years)	6 years 6 months 27 days
Options Exercisable - Number (in shares)	1,413,100
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 38.19
Options Exercisable - Intrinsic Value	31,571
Options Exercisable - Weighted Average Remaining Life (in years)	5 years 6 months 16 days
$22.80 - $28.79 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number (in shares)	157,850
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 26.84
Options Outstanding - Intrinsic Value	5,318
Options Outstanding - Weighted Average Remaining Life (in years)	2 years 5 months 24 days
Options Exercisable - Number (in shares)	157,850
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 26.84
Options Exercisable - Intrinsic Value	5,318
Options Exercisable - Weighted Average Remaining Life (in years)	2 years 5 months 24 days
$31.96 - $38.06 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number (in shares)	726,403
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 33.83
Options Outstanding - Intrinsic Value	19,395
Options Outstanding - Weighted Average Remaining Life (in years)	4 years 6 months 5 days
Options Exercisable - Number (in shares)	672,844
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 33.95
Options Exercisable - Intrinsic Value	17,885
Options Exercisable - Weighted Average Remaining Life (in years)	4 years 4 months 22 days
$40.73 - $55.01 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number (in shares)	1,324,061
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 46.22
Options Outstanding - Intrinsic Value	18,954
Options Outstanding - Weighted Average Remaining Life (in years)	8 years 2 months 9 days
Options Exercisable - Number (in shares)	582,406
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 46.16
Options Exercisable - Intrinsic Value	$ 8,368
Options Exercisable - Weighted Average Remaining Life (in years)	7 years 8 months 13 days