Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015		Oct. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 892,976		$ 893,002
Accumulated Amortization	560,591		527,972
Net Assets	332,385		365,030	[1]
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	490,929		490,242
Accumulated Amortization	316,714		298,705
Net Assets	174,215		191,537
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	209,984		210,172
Accumulated Amortization	97,829		92,146
Net Assets	112,155		118,026
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	145,616		146,364
Accumulated Amortization	116,389		109,067
Net Assets	29,227		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	18,779		18,779
Accumulated Amortization	8,464		7,765
Net Assets	10,315		11,014
In-process research and development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,400	[2]	3,086	[2]
Accumulated Amortization	0	[2]	0	[2]
Net Assets	2,400	[2]	3,086	[2]
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	22,738		21,829
Accumulated Amortization	18,665		17,759
Net Assets	$ 4,073		$ 4,070

[1] Derived from audited financial statements.

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