Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2020	Oct. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,445,032	$ 1,418,818
Accumulated Amortization	1,162,887	1,139,444
Net Assets	282,145	279,374	[1]
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	814,173	791,647
Accumulated Amortization	667,437	655,119
Net Assets	146,736	136,528
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	359,360	358,661
Accumulated Amortization	250,630	242,058
Net Assets	108,730	116,603
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	186,228	184,304
Accumulated Amortization	181,998	181,124
Net Assets	4,230	3,180
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	42,929	42,929
Accumulated Amortization	26,358	25,581
Net Assets	16,571	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	41,142	40,077
Accumulated Amortization	36,464	35,562
Net Assets	$ 4,678	$ 4,515

[1] Derived from audited financial statements.