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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Changes in accumulated other comprehensive loss [Abstract]        
Net foreign currency translation adjustment $ 550 $ (176) $ (2,130) $ (194)
Net change in postretirement benefit plan (see Note 13 for further information)        
Amortization of prior service credit (5) (5) (9) (9)
Amortization of loss 0 2 0 3
Total before tax (5) (3) (9) (6)
Tax 2 1 3 2
Net of tax (3) (2) (6) (4)
Other comprehensive income (loss) 547 (178) (2,136) (198)
Accumulated Other Comprehensive Loss [Line Items]        
Accumulated other comprehensive loss, at beginning of period     (2,651)  
Other comprehensive loss 547 $ (178) (2,136) $ (198)
Accumulated other comprehensive loss, at end of period (4,787)   (4,787)  
Foreign Currency Translation Adjustment [Member]        
Net change in postretirement benefit plan (see Note 13 for further information)        
Other comprehensive income (loss)     (2,130)  
Accumulated Other Comprehensive Loss [Line Items]        
Accumulated other comprehensive loss, at beginning of period     (2,702)  
Other comprehensive loss     (2,130)  
Accumulated other comprehensive loss, at end of period (4,832)   (4,832)  
Postretirement Benefit Plan [Member]        
Net change in postretirement benefit plan (see Note 13 for further information)        
Other comprehensive income (loss)     (6)  
Accumulated Other Comprehensive Loss [Line Items]        
Accumulated other comprehensive loss, at beginning of period     51  
Other comprehensive loss     (6)  
Accumulated other comprehensive loss, at end of period $ 45   $ 45