Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	$ 2,100
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	437,200
Debt and equity securities	188,069	$ 528,127
Strategic Investments member
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Unrealized gain (loss) on investments	800
Realized investment gains (losses)	3,500
Fair Value, Inputs, Level 3 [Member] | Strategic Investments member
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Debt and equity securities	$ 16,100	$ 12,500