Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands		Oct. 31, 2015	Oct. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Assets		$ 1,030,594	$ 893,002
Accumulated Amortization		666,935	527,972
Net Assets		363,659	365,030
Core-developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets		584,293	490,242
Accumulated Amortization		375,395	298,705
Net Assets		208,898	191,537
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets		231,908	210,172
Accumulated Amortization		115,170	92,146
Net Assets		116,738	118,026
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets		165,623	146,364
Accumulated Amortization		141,763	109,067
Net Assets		23,860	37,297
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets		2,530	2,530
Accumulated Amortization		2,530	2,530
Net Assets		0	0
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets		20,729	18,779
Accumulated Amortization		10,665	7,765
Net Assets		10,064	11,014
In-process research and development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	[1]		3,086
Accumulated Amortization	[1]		0
Net Assets	[1]		3,086
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets		25,511	21,829
Accumulated Amortization		21,412	17,759
Net Assets		$ 4,099	$ 4,070

[1] IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.