Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jul. 31, 2020	Oct. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,488,228	$ 1,418,818
Accumulated Amortization	1,212,890	1,139,444
Net Assets	275,338	279,374	[1]
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	827,232	791,647
Accumulated Amortization	692,545	655,119
Net Assets	134,687	136,528
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	380,817	358,661
Accumulated Amortization	268,574	242,058
Net Assets	112,243	116,603
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	192,757	184,304
Accumulated Amortization	185,357	181,124
Net Assets	7,400	3,180
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	43,096	42,929
Accumulated Amortization	28,070	25,581
Net Assets	15,026	17,348
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets	1,214	1,200
Accumulated Amortization	0	0
Net Assets	1,214	1,200
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	43,112	40,077
Accumulated Amortization	38,344	35,562
Net Assets	$ 4,768	$ 4,515

[1] Derived from audited financial statements.