Stock-Based Compensation (Summary Of RSU Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year, Shares	192	233	289
Granted, Shares	89	113	133
Vested, Shares	(116)	(147)	(183)
Forfeited, Shares	(4)	(7)	(6)
Outstanding at end of year, Shares	161	192	233
Outstanding at beginning of year, Weighted-average price (usd per share)	$ 49.65	$ 43.23	$ 35.42
Granted, Weighted-average price (usd per share)	$ 71.60	$ 54.30	$ 47.40
Vested, Weighted-average price (usd per share)	$ 50.91	$ 42.82	$ 34.04
Forfeited, Weighted-average price (usd per share)	$ 59.25	$ 47.88	$ 40.91
Outstanding at end of year, Weighted-average price (usd per share)	$ 60.86	$ 49.65	$ 43.23
Mid-term Incentive Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year, Shares	240	120
Granted, Shares	94	120	120
Outstanding at end of year, Shares	334	240	120
Outstanding at beginning of year, Weighted-average price (usd per share)	$ 46.63	$ 44.47
Granted, Weighted-average price (usd per share)	$ 64.74	$ 48.78	$ 44.47
Outstanding at end of year, Weighted-average price (usd per share)	$ 51.73	$ 46.63	$ 44.47