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Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jul. 31, 2019	Oct. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,398,327	$ 1,395,571
Accumulated Amortization	1,115,022	1,035,167
Net Assets	283,305	360,404
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	773,147	773,147
Accumulated Amortization	642,185	598,956
Net Assets	130,962	174,191
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	358,667	358,524
Accumulated Amortization	232,784	204,382
Net Assets	125,883	154,142
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	184,321	183,953
Accumulated Amortization	180,349	177,191
Net Assets	3,972	6,762
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	42,929	42,929
Accumulated Amortization	24,803	21,944
Net Assets	18,126	20,985
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets	1,200	1,200
Accumulated Amortization	0	0
Net Assets	1,200	1,200
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	38,063	35,818
Accumulated Amortization	34,901	32,694
Net Assets	$ 3,162	$ 3,124

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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