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Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Mar. 31, 2023
Sep. 30, 2022
Mar. 31, 2022
Indefinite Lived Intangible Assets By Major Class [Line Items]      
Cost $ 128,617 $ 128,617  
Accumulated Amortization 55,167 52,861  
Net $ 73,450 $ 75,756 $ 96,364
Completed technologies      
Indefinite Lived Intangible Assets By Major Class [Line Items]      
Weighted Average Amortization Period (in years) 6 years 10 months 24 days 6 years 10 months 24 days  
Cost $ 95,761 $ 95,761  
Accumulated Amortization 32,601 32,265  
Net $ 63,160 $ 63,496  
Customer relationships      
Indefinite Lived Intangible Assets By Major Class [Line Items]      
Weighted Average Amortization Period (in years) 4 years 8 months 12 days 4 years 8 months 12 days  
Cost $ 25,168 $ 25,168  
Accumulated Amortization 20,038 18,241  
Net $ 5,130 $ 6,927  
Trade names      
Indefinite Lived Intangible Assets By Major Class [Line Items]      
Weighted Average Amortization Period (in years) 5 years 5 years  
Cost $ 7,088 $ 7,088  
Accumulated Amortization 2,299 2,174  
Net $ 4,789 $ 4,914  
Covenants not to compete      
Indefinite Lived Intangible Assets By Major Class [Line Items]      
Weighted Average Amortization Period (in years) 3 years 3 years  
Cost $ 600 $ 600  
Accumulated Amortization 229 181  
Net $ 371 $ 419