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DERIVATIVES (Fair Value of Derivative Instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets $ 2,776 $ 1,185
Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 4,351 2,452
Other Noncurrent Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities 5,085 5,439
Designated as Hedging Instruments | Foreign exchange contracts | Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets 519 439
Designated as Hedging Instruments | Foreign exchange contracts | Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 604 923
Designated as Hedging Instruments | Foreign exchange contracts | Other Noncurrent Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities 0 0
Designated as Hedging Instruments | Interest Rate Swap [Member] | Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets 0 0
Designated as Hedging Instruments | Interest Rate Swap [Member] | Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 0 0
Designated as Hedging Instruments | Interest Rate Swap [Member] | Other Noncurrent Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities 5,085 5,439
Not designated as hedging instruments | Foreign exchange contracts | Other Current Assets    
Fair values of derivative instruments    
Fair value of derivative assets 2,257 746
Not designated as hedging instruments | Foreign exchange contracts | Other Current Liabilities    
Fair values of derivative instruments    
Fair value of derivative liabilities 3,747 1,529
Not designated as hedging instruments | Foreign exchange contracts | Other Noncurrent Liabilities [Member]    
Fair values of derivative instruments    
Fair value of derivative liabilities $ 0 $ 0