Segment Reporting (Details 2) (USD $) In Thousands	3 Months Ended		8 Months Ended	9 Months Ended
	Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2010	Aug. 31, 2011
Net revenues by geographic region
Net revenues	$ 509,282	$ 517,269	$ 1,512,437	$ 1,994,830
United States [Member]
Net revenues by geographic region
Net revenues	372,727	428,037	1,294,118	1,611,117
Europe [Member]
Net revenues by geographic region
Net revenues	127,229	85,485	215,034	363,114
Asia (including Middle East) [Member]
Net revenues by geographic region
Net revenues	$ 9,326	$ 3,747	$ 3,285	$ 20,599