Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		$ 33,807	$ 33,715	$ 99,979	$ 95,645
Core/developed technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		18,822	18,354	54,639	51,966
Customer relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		5,443	5,816	16,906	16,655
Contract rights intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		7,917	7,913	23,595	22,719
Covenants not to compete
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		0	17	0	50
Trademarks and trade names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		709	709	2,107	1,600
Capitalized software development costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	[1]	$ 916	$ 906	$ 2,732	$ 2,655

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