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Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Sep. 30, 2024
Assets:    
Interest rate swap contract $ 667 $ 716
Liabilities:    
Contingent consideration liabilities 4,873 81,311
Level 2 [Member]    
Assets:    
Interest rate swap contract 667 716
Level 3 [Member]    
Liabilities:    
Contingent consideration liabilities $ 4,873 $ 81,311