Income Taxes - Significant Components of Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Jan. 31, 2023
Deferred Tax Assets, Net [Abstract]
Net operating loss carryforwards	$ 12,995	$ 14,788
Research and development credit carryforwards	16,610	12,792
Stock-based compensation	84,906	116,798
Accruals and reserves	39,295	42,271
Deferred revenue	308,152	303,167
Capitalized research expenditures	379,102	245,708
Operating lease liabilities	17,829	23,140
Other assets	4,105	10,541
Total deferred tax assets	862,994	769,205
Valuation allowance	(35,949)	(53,570)
Total deferred tax assets net of valuation allowance	827,045	715,635
Deferred Tax Liabilities, Net [Abstract]
Property and equipment and intangible assets	(35,007)	(36,274)
Deferred contract acquisition costs	(83,862)	(89,839)
Operating right-of-use assets	(14,396)	(19,352)
Other liabilities	(35,480)	(13,054)
Total deferred tax liabilities	(168,745)	(158,519)
Net deferred tax assets	$ 658,300	$ 557,116