Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2015		Jan. 31, 2014
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 33,214		$ 28,995
Core/developed technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	18,009		15,621
Customer relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	5,748		5,053
Contract rights intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	7,852		7,126
Covenants not to compete
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	0		17
Trademarks and trade names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	699		314
Capitalized software development costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 906	[1]	$ 864	[1]

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