Cash and Cash Equivalents, Investments and Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Oct. 31, 2023	Oct. 31, 2023	Oct. 31, 2023	Jan. 31, 2023
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Investments, weighted average maturity			18 months
Investments, term	2 years
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	$ 4,300	$ 4,300	$ 4,300
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	395,900	395,900	395,900
Debt and equity securities	314,388	314,388	314,388	$ 528,127
Strategic Investments
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Unrealized loss on investments		800	800
Realized investment gains (losses)		1,500	3,500
Level 3 | Strategic Investments
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Debt and equity securities	$ 13,000	$ 13,000	$ 13,000	$ 12,500