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Leases - Components of Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Lease, Cost [Abstract]    
Operating lease expense $ 2,488 $ 3,117
Short-term lease expense 5,975 9,608
Total lease expense $ 8,463 $ 12,725