Amortization Expense Related to Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Apr. 30, 2013		Apr. 30, 2012		Apr. 30, 2013		Apr. 30, 2012
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 33,072		$ 29,350		$ 66,262		$ 47,001
Developed And Core Technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	17,222		16,520		34,356		27,896
Customer Relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	5,363		4,539		10,736		7,739
Contract Rights Intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	9,171		7,175		18,549		9,182
Covenants Not To Compete
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	33		70		66		141
Trademarks Trade Names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	484		300		970		555
Capitalized Software Development Costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 799	[1]	$ 746	[1]	$ 1,585	[1]	$ 1,488	[1]

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