Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		$ 32,445	$ 33,807	$ 103,321	$ 99,979
Core/developed technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		21,673	18,822	65,536	54,639
Customer relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		6,333	5,443	18,820	16,906
Contract rights intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		2,720	7,917	13,827	23,595
Trademarks and trade names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		792	709	2,374	2,107
Capitalized software development costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	[1]	$ 927	$ 916	$ 2,764	$ 2,732

[1] Amortization of capitalized software development costs is included in cost of license revenue in the unaudited condensed consolidated statements of operations.