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Basis of Presentation - Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Jun. 30, 2020
Fair Value of Financial Instruments    
Liabilities-contingent consideration $ 21,015 $ 13,867
Recurring    
Fair Value of Financial Instruments    
Assets - Insurance company contracts 39,724 37,155
Liabilities-contingent consideration 21,015 13,867
Recurring | Level 2    
Fair Value of Financial Instruments    
Assets - Insurance company contracts 39,724 37,155
Recurring | Level 3    
Fair Value of Financial Instruments    
Liabilities-contingent consideration $ 21,015 $ 13,867