Incentive Plans and Stock-Based Compensation (Details 4) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Aug. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	2,545,348
Options Outstanding - Weighted Average Exercise Price	$ 39.54
Options Outstanding - Intrinsic Value	$ 37,408
Options Outstanding - Weighted Average Remaining Life in Years	6 years 6 months 18 days
Options Exercisable - Number	1,746,885
Options Exercisable - Weighted Average Exercise Price	$ 36.90
Options Exercisable - Intrinsic Value	30,284
Options Exercisable - Weighted Average Remaining Life in Years	5 years 7 months 24 days
$20.57 - $28.79 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	208,025
Options Outstanding - Weighted Average Exercise Price	$ 25.99
Options Outstanding - Intrinsic Value	5,877
Options Outstanding - Weighted Average Remaining Life in Years	2 years 7 months 13 days
Options Exercisable - Number	208,025
Options Exercisable - Weighted Average Exercise Price	$ 25.99
Options Exercisable - Intrinsic Value	5,877
Options Exercisable - Weighted Average Remaining Life in Years	2 years 7 months 13 days
$31.96 - $38.06 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	1,007,212
Options Outstanding - Weighted Average Exercise Price	$ 33.55
Options Outstanding - Intrinsic Value	20,844
Options Outstanding - Weighted Average Remaining Life in Years	4 years 11 months 19 days
Options Exercisable - Number	953,453
Options Exercisable - Weighted Average Exercise Price	$ 33.61
Options Exercisable - Intrinsic Value	19,666
Options Exercisable - Weighted Average Remaining Life in Years	4 years 10 months 24 days
$40.73 - $49.91 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	1,330,111
Options Outstanding - Weighted Average Exercise Price	$ 46.21
Options Outstanding - Intrinsic Value	10,687
Options Outstanding - Weighted Average Remaining Life in Years	8 years 4 months 13 days
Options Exercisable - Number	585,407
Options Exercisable - Weighted Average Exercise Price	$ 46.14
Options Exercisable - Intrinsic Value	$ 4,741
Options Exercisable - Weighted Average Remaining Life in Years	7 years 11 months 12 days