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Fair Value Measurements - Summary of Changes in Fair Value of Contingent Consideration Liabilities Which Reflect Level 3 Inputs (Parenthetical) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent consideration | $ (25,712) | $ 1,167
Contingent Consideration Liabilities [Member] | Level 3 [Member] |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent consideration | $ 50,000 |

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