Income Taxes (Significant Components Of Provision For (Benefit From) Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2009
Income Taxes [Abstract]
Current, Federal	$ 14,619	$ 25,140	$ 23,547
Deferred, Federal	2,364	(1,353)	(992)
Total Federal	16,983	23,787	22,555
Current, State	1,925	3,425	2,934
Deferred, State	1,341	(1,155)	(1,050)
Total State	3,266	2,270	1,884
Current, Foreign	19,490	12,314	13,246
Deferred, Foreign	(2,439)	(5,970)	(10,588)
Total Foreign	17,051	6,344	2,658
Provision for income taxes	$ 37,300	$ 32,401	$ 27,097