INCOME TAXES - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Income before income taxes
United States	$ 35,446	$ (3,776)	$ (39,662)
Foreign	157,150	110,353	(64,917)
Income (loss) before income taxes	192,596	106,577	(104,579)
Current:
Federal	18,320	(6,974)	24,621
State	347	(13)	253
Foreign	10,078	26,230	22,741
Total current income tax expenses	28,745	19,243	47,615
Deferred and others:
Federal	(1,047)	916	(2,253)
State	(19)	17	(223)
Foreign	(31,333)	(2,678)	(30,367)
Total deferred and other income tax expenses	(32,399)	(1,745)	(32,843)
Total income tax (benefit) expense	$ (3,654)	$ 17,498	$ 14,772