INCOME TAXES - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income before income taxes
United States	$ (3,776)	$ (39,662)	$ 15,253
Foreign	110,353	(64,917)	103,613
Income (loss) before income taxes	106,577	(104,579)	118,866
Current:
Federal	(6,974)	24,621	13,975
State	(13)	253	308
Foreign	26,230	22,741	10,602
Total current income tax expenses	19,243	47,615	24,885
Deferred and others:
Federal	916	(2,253)	(1,443)
State	17	(223)	(18)
Foreign	(2,678)	(30,367)	3,017
Total deferred and other income tax expenses	(1,745)	(32,843)	1,556
Total income tax expenses	$ 17,498	$ 14,772	$ 26,441