Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 30, 2020	Oct. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,466,960	$ 1,418,818
Accumulated Amortization	1,187,649	1,139,444
Net Assets	279,311	279,374	[1]
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	817,173	791,647
Accumulated Amortization	680,161	655,119
Net Assets	137,012	136,528
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	376,734	358,661
Accumulated Amortization	259,621	242,058
Net Assets	117,113	116,603
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	186,717	184,304
Accumulated Amortization	183,334	181,124
Net Assets	3,383	3,180
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	42,929	42,929
Accumulated Amortization	27,136	25,581
Net Assets	15,793	17,348
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	42,207	40,077
Accumulated Amortization	37,397	35,562
Net Assets	$ 4,810	$ 4,515

[1] Derived from audited financial statements.