Stockholders' Equity - Changes in Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,016,114	$ 1,920,158	$ 1,921,917
Other comprehensive income, net of tax	(13,715)	1,213	(3,287)
Other comprehensive loss	(14,284)
Tax benefit	569
Ending balance	1,845,762	2,016,114	1,920,158
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	8,825	7,612	10,899
Other comprehensive income, net of tax	(13,715)	1,213	(3,287)
Ending balance	(4,890)	8,825	7,612
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	8,925	8,231
Other comprehensive income, net of tax		694
Other comprehensive loss	(14,012)
Tax benefit	569
Ending balance	(4,518)	8,925	8,231
Unrealized Gain (Loss) on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(100)	(619)
Other comprehensive income, net of tax		519
Other comprehensive loss	(272)
Tax benefit	0
Ending balance	$ (372)	$ (100)	$ (619)