Segment Information (Revenue From External Customers From Different Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Feb. 29, 2012	Feb. 28, 2011
Revenue from External Customer [Line Items]
Total revenue	$ 124,426	$ 134,237
North America [Member]
Revenue from External Customer [Line Items]
Total revenue	60,067	64,478
EMEA [Member]
Revenue from External Customer [Line Items]
Total revenue	44,417	51,415
Latin America [Member]
Revenue from External Customer [Line Items]
Total revenue	9,329	9,159
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue	$ 10,613	$ 9,185

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration