Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Apr. 30, 2021		Apr. 30, 2020		Apr. 30, 2021	Apr. 30, 2020
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 20,793		$ 25,028		$ 42,107	$ 48,462
Core/developed technology
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	10,969		12,724		21,986	25,042
Customer relationships
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	7,703		8,912		15,482	17,474
Contract rights intangible
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	439		1,681		1,309	2,557
Trademarks and trade names
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	610		778		1,220	1,555
Capitalized software development costs
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization expense of intangible assets	$ 1,072	[1]	$ 933	[1]	$ 2,110	$ 1,834

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