Incentive Plans and Stock-Based Compensation - Stock Options Exercise Prices (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Feb. 28, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number (in shares)	2,545,641
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 47.97
Options Outstanding - Intrinsic Value	$ 45,418
Options Outstanding - Weighted Average Remaining Life in Years	6 years 9 months 23 days
Options Exercisable - Number (in shares)	1,661,021
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 42.68
Options Exercisable - Intrinsic Value	38,412
Options Exercisable - Weighted Average Remaining Life in Years	5 years 8 months 15 days
$25.31 - $28.79 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, minimum	$ 25.31
Exercise price range, maximum	$ 28.79
Options Outstanding - Number (in shares)	61,750
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 26.51
Options Outstanding - Intrinsic Value	2,427
Options Outstanding - Weighted Average Remaining Life in Years	2 years 6 months 10 days
Options Exercisable - Number (in shares)	61,750
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 26.51
Options Exercisable - Intrinsic Value	2,427
Options Exercisable - Weighted Average Remaining Life in Years	2 years 6 months 10 days
$31.96 - $38.46 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, minimum	$ 31.96
Exercise price range, maximum	$ 38.46
Options Outstanding - Number (in shares)	500,009
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 33.64
Options Outstanding - Intrinsic Value	16,085
Options Outstanding - Weighted Average Remaining Life in Years	3 years 5 months 8 days
Options Exercisable - Number (in shares)	500,009
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 33.64
Options Exercisable - Intrinsic Value	16,085
Options Exercisable - Weighted Average Remaining Life in Years	3 years 5 months 8 days
$42.86 - $49.91 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, minimum	$ 42.86
Exercise price range, maximum	$ 49.91
Options Outstanding - Number (in shares)	1,234,119
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 46.21
Options Outstanding - Intrinsic Value	24,194
Options Outstanding - Weighted Average Remaining Life in Years	6 years 11 months 1 day
Options Exercisable - Number (in shares)	986,313
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 46.12
Options Exercisable - Intrinsic Value	19,421
Options Exercisable - Weighted Average Remaining Life in Years	6 years 8 months 16 days
$55.01 - $63.22 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, minimum	$ 55.10
Exercise price range, maximum	$ 63.22
Options Outstanding - Number (in shares)	749,763
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 62.19
Options Outstanding - Intrinsic Value	2,712
Options Outstanding - Weighted Average Remaining Life in Years	9 years 3 months
Options Exercisable - Number (in shares)	112,949
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 61.57
Options Exercisable - Intrinsic Value	$ 479
Options Exercisable - Weighted Average Remaining Life in Years	8 years 9 months 15 days