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Fair Value Measurements - Fair Value of Convertible Notes (Details) - Convertible Debt - USD ($) $ in Thousands | Oct. 31, 2023 | Jan. 31, 2023 | Jan. 31, 2021 | Sep. 30, 2018
--- | --- | --- | --- | ---
0.5% Convertible Senior Notes due in 2023 |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Debt interest rate percentage |  |  |  | 0.50%
Aggregate principal amount | $ 0 | $ 37,083 |  |
Fair value amount | 0 | 38,981 |  |
0% Convertible Senior Notes due in 2024 |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Debt interest rate percentage |  |  | 0.00% |
Aggregate principal amount | 690,000 | 690,000 |  |
Fair value amount | $ 680,326 | $ 655,666 |  |

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