INCOME TAXES - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Income before income taxes
United States	$ (39,662)	$ 15,253	$ (230)
Foreign	(64,917)	103,613	(21,528)
(Loss) income before income taxes	(104,579)	118,866	(21,758)
Current:
Federal	24,621	13,975	45,878
State	253	308	135
Foreign	22,741	10,602	19,650
Total current income tax expenses	47,615	24,885	65,663
Deferred and others:
Federal	(2,253)	(1,443)	(6,986)
State	(223)	(18)	(78)
Foreign	(30,367)	3,017	2,081
Total deferred and other income tax expenses	(32,843)	1,556	(4,983)
Total income tax expenses	$ 14,772	$ 26,441	$ 60,680