Stock-Based Compensation (Activity Stock Options And Stock Awards) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of restricted stock awards, restricted stock units and deferred units on date vested	$ 13,886	$ 9,160	$ 6,333
Total intrinsic value of stock options on date exercised	9,601	31,566	47,395
Deferred Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of restricted stock awards, restricted stock units and deferred units on date vested	114	40	0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of restricted stock awards, restricted stock units and deferred units on date vested	0	0	131
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of restricted stock awards, restricted stock units and deferred units on date vested	$ 13,772	$ 9,120	$ 6,202