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Acquisitions - Narrative (Details) $ in Thousands					12 Months Ended
Acquisitions - Narrative (Details) $ in Thousands	Sep. 26, 2025 USD ($) reporting_unit	Sep. 12, 2025 USD ($) reporting_unit	Nov. 20, 2024 USD ($)	Mar. 26, 2024 USD ($)	Jan. 31, 2026 USD ($) reporting_unit	Jan. 31, 2025 USD ($)
Intangible Asset, Acquired, Finite-Lived [Line Items]
Goodwill					$ 1,363,294	$ 912,805
Number of reporting units \| reporting_unit	1	1			1
Developed technology
Intangible Asset, Acquired, Finite-Lived [Line Items]
Weighted-Average Remaining Useful Life					54 months	55 months
Pangea Cyber Corporation
Intangible Asset, Acquired, Finite-Lived [Line Items]
Voting equity interest acquired (as a percent)	100.00%
Business combination, consideration transferred	$ 212,100
Cash acquired	9,400
Fair value of replacement equity awards	300
Liability awards	10,300
Fair Value	$ 13,200
Weighted-Average Remaining Useful Life	72 months
Net tangible liabilities acquired	$ 400
Goodwill	$ 209,900
Acquisition related costs					$ 3,100
Onum Technology, Inc.
Intangible Asset, Acquired, Finite-Lived [Line Items]
Voting equity interest acquired (as a percent)		100.00%
Business combination, consideration transferred		$ 252,700
Cash acquired		15,200
Fair value of replacement equity awards		2,000
Fair Value		21,400
Net tangible liabilities acquired		200
Goodwill		233,100
Acquisition related costs					$ 4,100
Onum Technology, Inc. \| Developed technology
Intangible Asset, Acquired, Finite-Lived [Line Items]
Fair Value		$ 20,600
Weighted-Average Remaining Useful Life		84 months
A.S. Adaptive Shield Ltd.
Intangible Asset, Acquired, Finite-Lived [Line Items]
Voting equity interest acquired (as a percent)			100.00%
Business combination, consideration transferred			$ 213,700
Cash acquired			13,700
Fair value of replacement equity awards			700
Fair Value			31,100
Net tangible liabilities acquired			7,700
Goodwill			191,000
A.S. Adaptive Shield Ltd. \| Developed technology
Intangible Asset, Acquired, Finite-Lived [Line Items]
Fair Value			$ 23,600
Weighted-Average Remaining Useful Life			72 months
Flow Security
Intangible Asset, Acquired, Finite-Lived [Line Items]
Voting equity interest acquired (as a percent)				100.00%
Business combination, consideration transferred				$ 96,400
Cash acquired				800
Fair value of replacement equity awards				500
Fair Value				13,500
Net tangible liabilities acquired				600
Goodwill				$ 84,000
Flow Security \| Developed technology
Intangible Asset, Acquired, Finite-Lived [Line Items]
Weighted-Average Remaining Useful Life				72 months