SEGMENT INFORMATION - Schedule of Revenues and Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Total revenues and long-lived assets associated with business operations
Total revenue	$ 60,143	$ 153,783	$ 208,765	$ 247,038	$ 248,190	$ 258,343	$ 274,671	$ 287,835	$ 669,729	$ 1,069,039	$ 1,235,479
Property and Equipment, Net	57,176				78,090				57,176	78,090	99,288
U.S.
Total revenues and long-lived assets associated with business operations
Total revenue									613,652	972,994	1,132,041
Property and Equipment, Net	56,532				75,789				56,532	75,789	95,956
Other countries
Total revenues and long-lived assets associated with business operations
Total revenue									56,077	96,045	103,438
Property and Equipment, Net	$ 644				$ 2,301				$ 644	$ 2,301	$ 3,332