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ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Accumulated Other Comprehensive Income    
Balances $ 87,347  
Balances 95,111  
Accumulated Other Comprehensive Income    
Accumulated Other Comprehensive Income    
Balances (5,586) $ (12,003)
Unrealized gain on cash flow hedges 568 (134)
Amounts reclassified from AOCI 36 48
Foreign currency translation gain 1,687 674
Balances (3,295) (11,415)
Pension Adjustments    
Accumulated Other Comprehensive Income    
Balances (945) (822)
Balances (945) (822)
Accumulated income (loss) on derivatives    
Accumulated Other Comprehensive Income    
Balances 196 (30)
Unrealized gain on cash flow hedges 568 (134)
Amounts reclassified from AOCI 36 48
Balances 800 (116)
Foreign Currency Translation Adjustments    
Accumulated Other Comprehensive Income    
Balances (4,837) (11,151)
Foreign currency translation gain 1,687 674
Balances $ (3,150) $ (10,477)