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DERIVATIVES (Fair Value of Derivative Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets $ 2,943 $ 2,776
Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 3,585 4,351
Other Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities 8,393 5,085
Designated as Hedging Instrument | Foreign exchange contracts | Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets 1,023 519
Designated as Hedging Instrument | Foreign exchange contracts | Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 229 604
Designated as Hedging Instrument | Foreign exchange contracts | Other Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities 0 0
Designated as Hedging Instrument | Interest Rate Swap [Member] | Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets 0 0
Designated as Hedging Instrument | Interest Rate Swap [Member] | Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 0 0
Designated as Hedging Instrument | Interest Rate Swap [Member] | Other Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities 8,393 5,085
Not designated as hedging instruments | Foreign exchange contracts | Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets 1,920 2,257
Not designated as hedging instruments | Foreign exchange contracts | Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 3,356 3,747
Not designated as hedging instruments | Foreign exchange contracts | Other Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities $ 0 $ 0