Income Taxes (Provisions For 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	$ 19,961	$ 11,536	$ 10,116
Current, State	1,982	1,925	1,383
Current, Foreign	5,131	5,392	7,293
Total current	27,074	18,853	18,792
Deferred, Federal	1,624	4,817	1,948
Deferred, State	71	48	(36)
Deferred, Foreign	174	(861)	(2,279)
Total deferred	1,869	4,004	(367)
Total	$ 28,943	$ 22,857	$ 18,425