Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2021	Oct. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,510,826	$ 1,489,314
Accumulated Amortization	1,256,451	1,234,992
Net Assets	254,375	254,322
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	846,611	827,232
Accumulated Amortization	714,026	703,009
Net Assets	132,585	124,223
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	381,686	380,838
Accumulated Amortization	285,019	277,219
Net Assets	96,667	103,619
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	193,087	192,812
Accumulated Amortization	187,758	186,763
Net Assets	5,329	6,049
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	43,095	43,096
Accumulated Amortization	29,325	28,716
Net Assets	13,770	14,380
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets	1,214	1,214
Accumulated Amortization	0	0
Net Assets	1,214	1,214
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	45,133	44,122
Accumulated Amortization	40,323	39,285
Net Assets	$ 4,810	$ 4,837