FAIR VALUE (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Liabilities
Fair value of long-term obligations	$ 1,100,000	$ 1,100,000
Assets and liabilities measured at fair value on recurring basis
Assets
Foreign exchange contracts, assets	262	663
Total assets at fair value	262	663
Liabilities
Foreign exchange contracts, liabilities	881	1,604
Cross currency swap contract, liability	4,712	16,309
Total liabilities at fair value	5,593	17,913
Assets and liabilities measured at fair value on recurring basis | Level 2
Assets
Foreign exchange contracts, assets	262	663
Total assets at fair value	262	663
Liabilities
Foreign exchange contracts, liabilities	881	1,604
Cross currency swap contract, liability	4,712	16,309
Total liabilities at fair value	$ 5,593	$ 17,913