SEGMENT INFORMATION - Schedule of Revenues and Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Total revenues and long-lived assets associated with business operations
Total Revenues	$ 248,190	$ 258,343	$ 274,671	$ 287,835	$ 300,383	$ 305,783	$ 313,849	$ 315,464	$ 1,069,039	$ 1,235,479	$ 1,292,800
Property and Equipment, Net	78,090				99,288				78,090	99,288	123,281
U.S.
Total revenues and long-lived assets associated with business operations
Total Revenues									972,994	1,132,041	1,197,085
Property and Equipment, Net	75,789				95,956				75,789	95,956	119,649
Other countries
Total revenues and long-lived assets associated with business operations
Total Revenues									96,045	103,438	95,715
Property and Equipment, Net	$ 2,301				$ 3,332				$ 2,301	$ 3,332	$ 3,632