Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2017	Oct. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,133,232	$ 1,068,428
Accumulated Amortization	831,310	801,767
Net Assets	301,922	266,661
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	622,954	610,812
Accumulated Amortization	479,000	460,722
Net Assets	143,954	150,090
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	276,625	235,997
Accumulated Amortization	146,731	139,932
Net Assets	129,894	96,065
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	173,249	171,248
Accumulated Amortization	164,730	162,183
Net Assets	8,519	9,065
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	25,129	20,729
Accumulated Amortization	14,763	13,821
Net Assets	10,366	6,908
In Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	4,600
Accumulated Amortization	0
Net Assets	4,600
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	30,675	29,642
Accumulated Amortization	26,086	25,109
Net Assets	$ 4,589	$ 4,533