SEGMENT INFORMATION - Schedule of Revenues and Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Total revenues and long-lived assets associated with business operations
Total Revenues	$ 294,885	$ 300,801	$ 308,515	$ 309,873	$ 320,902	$ 313,478	$ 315,249	$ 318,831	$ 1,214,074	$ 1,268,460	$ 1,291,933
Property and Equipment, Net	105,860				123,281				105,860	123,281	152,160
U.S.
Total revenues and long-lived assets associated with business operations
Total Revenues									1,112,155	1,174,408	1,198,227
Property and Equipment, Net	102,528				119,649				102,528	119,649	146,722
Other countries
Total revenues and long-lived assets associated with business operations
Total Revenues									101,919	94,052	93,706
Property and Equipment, Net	$ 3,332				$ 3,632				$ 3,332	$ 3,632	$ 5,438