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Leases - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Lessee, Lease, Description [Line Items]      
Expected rental payments $ 60,423    
Sublease income 975 $ 300 $ 400
Operating lease costs 7,843    
Monaca, Pennsylvania | Affiliated Entity      
Lessee, Lease, Description [Line Items]      
Expected rental payments $ 3,600    
Operating lease, term 10 years    
Extension option term 5 years    
Minimum      
Lessee, Lease, Description [Line Items]      
Operating lease, term 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Operating lease, term 15 years