Summary of Revenue by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2012	May 31, 2011	May 31, 2012	May 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 247,363	$ 216,421	$ 473,065	$ 401,762
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	121,588	103,849	229,192	199,537
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	9,860	8,867	19,386	19,792
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	131,448	112,716	248,578	219,329
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	21,929	22,019	46,333	38,361
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	62,589	59,249	127,062	103,972
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	84,518	81,268	173,395	142,333
APJ
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 31,397	$ 22,437	$ 51,092	$ 40,100