Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Lease, Cost [Abstract]
Operating lease expense	$ 1,743	$ 3,229	$ 6,542	$ 9,601
Short-term lease expense	6,772	9,808	19,020	30,423
Total lease expense	$ 8,515	$ 13,037	$ 25,562	$ 40,024