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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

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