INCOME TAXES - Income Taxes Accounting for Uncertainty in Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized tax benefits	$ 7,544
Unrecognized tax benefits that would impact effective tax rate	7,255
Interest on income taxes accrued	746
Income tax penalties accrued	916
Non-U.S
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income tax penalties accrued		$ 2,692
Income tax settlements	1,166
Favorable adjustment to tax expense	1,526
Payments for income tax settlements	2,988
Income tax settlement accrual	$ 844
Non-U.S | Minimum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income tax examination, open tax years	3 years
Non-U.S | Maximum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income tax examination, open tax years	6 years