Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands		3 Months Ended
		Jan. 31, 2020	Jan. 31, 2019
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		$ 23,434	$ 28,999
Core/developed technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		12,318	16,359
Customer relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		8,562	9,580
Contract rights intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		875	1,116
Trademarks and trade names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets		778	1,172
Capitalized software development costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	[1]	$ 901	$ 772

[1] Amortization of capitalized software development costs is included in cost of products revenue in the unaudited condensed consolidated statements of operations.