SEGMENT INFORMATION - Summary of Revenue by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 28, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 237,790	$ 225,702
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	117,654	107,604
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	9,761	9,526
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	127,415	117,130
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	21,988	24,404
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	63,435	64,473
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	85,423	88,877
APJ
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 24,952	$ 19,695