Finance and Operating Leases - Finance leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Finance leases (ASC 842)
2020	$ 6,449
2021	13,316
2022	2,383
2023	1,532
Total minimum payments	23,680
Less: imputed interest	(427)
Finance lease liability	23,253
Less: current portion of finance lease liability	(17,988)
Long-term finance lease liability	$ 5,265
Finance leases (ASC 840)
2020		$ 20,070
2021		4,819
2022		340
Total minimum payments		25,229
Less: imputed interest		(581)
Finance lease liability		24,648
Less: current portion of finance lease liability		(19,588)
Long-term finance lease liability		$ 5,060