Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Apr. 30, 2015		Apr. 30, 2014		Apr. 30, 2015		Apr. 30, 2014
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 32,959		$ 32,935		$ 66,172		$ 61,930
Core/developed technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	17,808		17,989		35,817		33,611
Customer relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	5,715		5,787		11,462		10,839
Contract rights intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	7,826		7,680		15,678		14,807
Covenants not to compete
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	0		17		0		33
Trademarks and trade names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	699		577		1,398		891
Capitalized software development costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 911	[1]	$ 885	[1]	$ 1,817	[1]	$ 1,749	[1]

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