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Acquisition-Related Intangible Assets, Net - Schedule of Acquired Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021	Jan. 31, 2022
Acquisition-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 684,900		$ 684,900		$ 684,900
Less accumulated amortization	(358,230)		(358,230)		(293,898)
Total	326,670		326,670		391,002
Amortization of intangible assets	21,000	$ 19,000	64,000	$ 57,000
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	346,300		346,300		346,300
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	311,100		311,100		311,100
Backlog
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	15,000		15,000		15,000
Trade name
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 12,500		$ 12,500		$ 12,500