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Cash, Cash Equivalents and Short-Term Investments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Oct. 31, 2022
Oct. 31, 2021
Jan. 31, 2022
Cash and Cash Equivalents [Line Items]          
Cash         $ 884,700
Interest and investment income $ 4,700 $ 100 $ 8,200 $ 200  
Net amortization of premiums or discounts on short-term investments $ 2,100 $ 0 $ 3,346 $ 0  
Certificates of Deposit          
Cash and Cash Equivalents [Line Items]          
Short-term investments         $ 50,000