Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2017	Oct. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,166,198	$ 1,068,428
Accumulated Amortization	912,355	801,767
Net Assets	253,843	266,661
Core-developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	647,975	610,812
Accumulated Amortization	526,796	460,722
Net Assets	121,179	150,090
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	278,811	235,997
Accumulated Amortization	166,886	139,932
Net Assets	111,925	96,065
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	174,615	171,248
Accumulated Amortization	172,178	162,183
Net Assets	2,437	9,065
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	25,329	20,729
Accumulated Amortization	17,401	13,821
Net Assets	7,928	6,908
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets	6,600
Accumulated Amortization	0
Net Assets	6,600
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	32,868	29,642
Accumulated Amortization	29,094	25,109
Net Assets	$ 3,774	$ 4,533