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Business Combinations - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 07, 2019
Jun. 30, 2019
Jun. 30, 2019
Term Loans | Secured Debt      
Business Acquisition [Line Items]      
Borrowings   $ 70,000,000 $ 70,000,000
SSS      
Business Acquisition [Line Items]      
Percentage of equity interest acquired 100.00%    
Net purchase price $ 66,500,000    
Consideration paid 69,558,000    
Cash on hand acquired 3,100,000    
Transaction expenses and financing costs 4,700,000    
Escrow funds 1,200,000    
Revenue contributed since the acquisition date   4,500,000 4,500,000
Income from operations contributed since the acquisition date   $ 200,000 $ 300,000
SSS | Term Loans | Secured Debt      
Business Acquisition [Line Items]      
Borrowings $ 70,000,000