Segment Information (Revenue From External Customers From Different Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2012	May 31, 2011	May 31, 2012	May 31, 2011
Revenue from External Customer [Line Items]
Total revenue	$ 114,596	$ 134,684	$ 239,022	$ 268,921
North America [Member]
Revenue from External Customer [Line Items]
Total revenue	54,703	60,448	114,770	124,926
EMEA [Member]
Revenue from External Customer [Line Items]
Total revenue	43,040	52,908	87,457	104,323
Latin America [Member]
Revenue from External Customer [Line Items]
Total revenue	8,324	9,415	17,653	18,574
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue	$ 8,529	$ 11,913	$ 19,142	$ 21,098