Summary of Revenue by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2012	Aug. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 255,021	$ 228,973	$ 728,086	$ 630,735
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	129,001	113,469	358,193	313,005
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	17,177	9,355	36,563	29,147
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	146,178	122,824	394,756	342,152
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	19,640	18,244	65,974	56,605
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	63,037	64,459	190,098	168,431
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	82,677	82,703	256,072	225,036
APJ
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 26,166	$ 23,446	$ 77,258	$ 63,547