Income Taxes - Significant Components of Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2025	Jan. 31, 2024
Deferred tax assets:
Net operating loss carryforwards	$ 7,362	$ 12,995
Research and development credit carryforwards	6,586	16,610
Stock-based compensation	59,565	84,906
Accruals and reserves	43,953	39,295
Deferred revenue	328,114	308,152
Capitalized research expenditures	514,667	379,102
Operating lease liabilities	16,551	17,829
Other assets	2,957	4,105
Total deferred tax assets	979,755	862,994
Valuation allowance	(28,990)	(35,949)
Total deferred tax assets net of valuation allowance	950,765	827,045
Deferred tax liabilities:
Property and equipment and intangible assets	(38,343)	(35,007)
Deferred contract acquisition costs	(76,439)	(83,862)
Operating right-of-use assets	(14,233)	(14,396)
Strategic investments	(75,290)	(35,480)
Total deferred tax liabilities	(204,305)	(168,745)
Net deferred tax assets	$ 746,460	$ 658,300