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FAIR VALUE (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Liabilities    
Fair value of long-term obligations $ 749,000 $ 739,000
Assets and liabilities measured at fair value on recurring basis    
Assets    
Forward exchange contracts, assets 748 1,612
Total assets at fair value 748 1,612
Liabilities    
Forward exchange contracts, liabilities 51,295 2,881
Total liabilities at fair value 51,295 2,881
Assets and liabilities measured at fair value on recurring basis | Level 2    
Assets    
Forward exchange contracts, assets 748 1,612
Total assets at fair value 748 1,612
Liabilities    
Forward exchange contracts, liabilities 51,295 2,881
Total liabilities at fair value $ 51,295 $ 2,881