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FAIR VALUE (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Liabilities    
Fair value of long-term obligations $ 760,000 $ 606,000
Assets and liabilities measured at fair value on recurring basis | Total    
Assets    
Forward exchange contracts, assets 2,036 1,044
Total assets at fair value 2,036 1,044
Liabilities    
Forward exchange contracts, liabilities 1,197 2,493
Total liabilities at fair value 1,197 2,493
Assets and liabilities measured at fair value on recurring basis | Level 2    
Assets    
Forward exchange contracts, assets 2,036 1,044
Total assets at fair value 2,036 1,044
Liabilities    
Forward exchange contracts, liabilities 1,197 2,493
Total liabilities at fair value $ 1,197 $ 2,493