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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2013
Financial instruments        
Cash and cash equivalents $ 18,535 $ 16,293 $ 15,005 $ 34,722
Restricted cash 2,782 3,151    
Foreign currency forward contracts, net 1,022 322    
Recurring | Level 1        
Financial instruments        
Cash and cash equivalents 18,535 16,293    
Cash and cash equivalents, fair value 18,535 16,293    
Restricted cash 2,782 3,151    
Restricted cash, fair value 2,782 3,151    
Recurring | Level 2        
Financial instruments        
Foreign currency forward contracts, assets 299 307    
Variable interest rate debt 13,185 16,225    
Variable interest rate debt, fair value 13,185 16,225    
Foreign currency forward contracts, net $ 1,321 $ 629