SEGMENT INFORMATION - Summary of Revenue by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 245,846	$ 247,363	$ 483,636	$ 473,065
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	130,450	121,588	248,104	229,192
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	12,180	9,860	21,941	19,386
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	142,630	131,448	270,045	248,578
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	18,095	21,929	40,083	46,333
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	59,429	62,589	122,865	127,062
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	77,524	84,518	162,948	173,395
APJ
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 25,692	$ 31,397	$ 50,643	$ 51,092