Income Taxes - Summary of Reconciliation of Beginning and Ending Balance of Gross Unrecognized Tax Benefit (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Income Tax Disclosure [Abstract]
Beginning balance	$ 117,760	$ 109,680
Increases in unrecognized tax benefits related to prior year tax positions	2,037	4,189
Decreases in unrecognized tax benefits related to prior year tax positions	(23,271)	(3,328)
Increases in unrecognized tax benefits related to current year tax positions	35,277	14,128
Decreases in unrecognized tax benefits related to settlements with taxing authorities	(1,858)	(4,967)
Reductions in unrecognized tax benefits due to lapse of applicable statute of limitations	(8,816)	(7,728)
Increases in unrecognized tax benefits acquired	3,575	5,718
Changes in unrecognized tax benefits due to foreign currency translation	(602)	68
Ending Balance	$ 124,102	$ 117,760