Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		$ 32,500	$ 32,959	$ 70,876	$ 66,172
Core/developed technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		21,607	17,808	43,863	35,817
Customer relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		6,295	5,715	12,488	11,462
Contract rights intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		2,885	7,826	11,106	15,678
Trademarks and trade names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		792	699	1,583	1,398
Capitalized software development costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	[1]	$ 921	$ 911	$ 1,836	$ 1,817

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