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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Financial instruments        
Cash and cash equivalents $ 22,778 $ 16,293 $ 22,290 $ 34,722
Restricted cash 2,887 3,151    
Foreign currency forward contracts, net 199 (322)    
Recurring | Level 1        
Financial instruments        
Cash and cash equivalents 22,778 16,293    
Cash and cash equivalents, fair value 22,778 16,293    
Restricted cash 2,887 3,151    
Restricted cash, fair value 2,887 3,151    
Recurring | Level 2        
Financial instruments        
Foreign currency forward contracts, assets 572 307    
Variable interest rate debt 14,400 16,225    
Variable interest rate debt, fair value 14,400 16,225    
Foreign currency forward contracts, net $ 373 $ 629