Stockholders' Equity - Summary of Changes in Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,845,762	$ 2,016,114
Other comprehensive income (loss)	42,389	(14,284)
Tax benefit (expenses)	(898)	569
Ending balance	2,082,587	1,845,762
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(4,890)	8,825
Ending balance	36,601	(4,890)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(4,518)	8,925
Other comprehensive income (loss)	41,672	(14,012)
Tax benefit (expenses)	(898)	569
Ending balance	36,256	(4,518)
Unrealized Gain (Loss) on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(372)	(100)
Other comprehensive income (loss)	717	(272)
Tax benefit (expenses)	0	0
Ending balance	$ 345	$ (372)