Investments and Fair Value Measurements - Privately Held Equity Securities (Details) - USD ($) $ in Thousands |
Apr. 30, 2025 |
Jan. 31, 2025 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Initial total cost | $ 69,514 | $ 69,140 |
| Cumulative net gains | 1,825 | 3,404 |
| Carrying amount, end of period | 71,339 | 72,544 |
| Privately held equity securities | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Initial total cost | 68,514 | 68,140 |
| Cumulative net gains | 1,825 | 3,404 |
| Carrying amount, end of period | 70,339 | 71,544 |
| Privately held debt and other securities | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Initial total cost | 1,000 | 1,000 |
| Cumulative net gains | 0 | 0 |
| Carrying amount, end of period | $ 1,000 | $ 1,000 |