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Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Sep. 30, 2021
Assets:    
Interest rate swap contract $ 1,112 $ 150
Liabilities:    
Contingent consideration liabilities 17,089 12,364
Level 2 [Member]    
Assets:    
Interest rate swap contract 1,112 150
Level 3 [Member]    
Liabilities:    
Contingent consideration liabilities $ 17,089 $ 12,364