Investments and Fair Value Measurements - Carrying Values for Publicly Traded and Privately Held Equity Securities (Details) - USD ($) $ in Thousands |
Jul. 31, 2024 |
Jan. 31, 2024 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Initial total cost | $ 53,842 | $ 51,373 |
| Cumulative net gains | 4,404 | 4,871 |
| Carrying amount, end of period | 58,246 | 56,244 |
| Privately held equity securities | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Initial total cost | 52,842 | 50,373 |
| Cumulative net gains | 4,404 | 4,871 |
| Carrying amount, end of period | 57,246 | 55,244 |
| 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 |