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FAIR VALUE (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Liabilities    
Fair value of long-term obligations $ 1,200,000 $ 739,000
Assets and liabilities measured at fair value on recurring basis    
Assets    
Foreign exchange contracts, assets 327 1,612
Total assets at fair value 327 1,612
Liabilities    
Foreign exchange contracts, liabilities 375 2,881
Cross currency swap contract, liability 12,097  
Total liabilities at fair value 12,472 2,881
Assets and liabilities measured at fair value on recurring basis | Level 2    
Assets    
Foreign exchange contracts, assets 327 1,612
Total assets at fair value 327 1,612
Liabilities    
Foreign exchange contracts, liabilities 375 2,881
Cross currency swap contract, liability 12,097  
Total liabilities at fair value $ 12,472 $ 2,881