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Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Tax Credit Carryforward [Line Items]
Increase (decrease) of valuation allowance	$ 327,957	$ 0	$ 0
Deferred tax asset valuation allowance	12,605	335,051
Unrecognized tax benefits	19,171	14,884	8,106	$ 2,778
Unrecognized tax benefits, if recognized, would impact effective tax rate	19,600	15,000	8,400
Interest and penalties	400	$ 100	$ 300
State Income Tax
Tax Credit Carryforward [Line Items]
Operating loss carryforward	122,300
State Income Tax \| Research and Development Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	18,400
Foreign Tax
Tax Credit Carryforward [Line Items]
Operating loss carryforward	$ 44,200