Income Taxes (Significant Components Of Provision For (Benefit From) Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 28, 2012	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Income Tax Disclosure [Abstract]
Current, Federal									$ 24,829	$ 29,554	$ 14,619
Deferred, Federal									(13,809)	(12,231)	2,364
Total Federal									11,020	17,323	16,983
Current, State									865	1,078	1,925
Deferred, State									(53)	(2,345)	1,341
Total State									812	(1,267)	3,266
Current, Foreign									17,103	22,919	19,490
Deferred, Foreign									(2,535)	(5,775)	(2,439)
Total Foreign									14,568	17,144	17,051
Provision for income taxes	$ 15,500	$ 7,900	$ 3,100	$ (100)	$ 15,300	$ 7,400	$ 7,200	$ 3,300	$ 26,400	$ 33,200	$ 37,300