INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2018
Income tax benefit (expense)	$ 45,859		$ (6,492)	$ (10,044)	$ (18,724)
Effective tax rate (as a percent)	22.90%		23.20%	(7.50%)	19.90%
Non-cash functional currency election	$ 18,000			$ 18,000
Net reduction in income tax expense due to Tax Cuts and Jobs Act		$ 26,400		26,400
Mandatory transition tax due to tax legislation		$ 12,200		$ 12,200
Mandatory transition tax payment period		8 years		8 years
Re-measurement of net deferred tax assets and liabilities due to tax legislation		$ 2,700		$ 2,700
Re-measurement of foreign uncertain tax positions due to tax legislation		$ 16,900		$ 16,900
Forecast
Effective tax rate (as a percent)						28.10%