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Fair Value Measurements - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Apr. 30, 2019
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Acquisition earn-out contingency   $ 0 $ 4,608 $ 0  
Other investments   24,220 $ 0    
Carrying Value          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Other investments   $ 24,220      
2.89% promissory note receivable due April 2024          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Fair value of notes receivable $ 1,100       $ 1,100
Interest on note receivable 2.89% 2.89% 2.89%    
2.89% promissory note receivable due April 2024 | Carrying Value          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Fair value of notes receivable   $ 1,215 $ 1,181    
Founders One LLC          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Other investments   15,000      
Rich Data Corp          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Other investments   $ 6,200      
Percentage of ownership   14.60%