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DEBT OBLIGATIONS (Details)
¥ in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2016
CNY (¥)
Mar. 31, 2016
USD ($)
Mar. 31, 2016
USD ($)
Jan. 08, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Obligations          
Current borrowings     $ 21,947   $ 9,860
Unamortized debt issuance costs     (1,276)   (1,388)
Long-term debt     55,037   57,518
Maturities of long-term debt          
Remainder of 2016     21,947    
2017     10,374    
2018     15,939    
2019     30,000    
Total     78,260    
Senior Credit Facilities          
Debt Obligations          
Average outstanding borrowings   $ 47,500      
Available borrowing capacity     18,600    
Senior Credit Facilities | Base Rate          
Debt Obligations          
Applicable margin (as a percent) 1.50% 1.50%      
Senior Credit Facilities | Base Rate | Minimum          
Debt Obligations          
Applicable margin (as a percent) 0.25% 0.25%      
Senior Credit Facilities | Base Rate | Maximum          
Debt Obligations          
Applicable margin (as a percent) 2.00% 2.00%      
Senior Credit Facilities | Eurocurrency Rate          
Debt Obligations          
Applicable margin (as a percent) 2.00% 2.00%      
Senior Credit Facilities | Eurocurrency Rate | Minimum          
Debt Obligations          
Applicable margin (as a percent) 1.25% 1.25%      
Senior Credit Facilities | Eurocurrency Rate | Maximum          
Debt Obligations          
Applicable margin (as a percent) 3.00% 3.00%      
Revolving Credit Facility          
Debt Obligations          
Current borrowings     11,357    
Maximum borrowing capacity     30,000 $ 30,000  
Debt instrument term 5 years 5 years      
Revolving Credit Facility | Foreign          
Debt Obligations          
Maximum borrowing capacity sublimit       25,000  
Revolving Credit Facility | Amount before increase          
Debt Obligations          
Maximum borrowing capacity       15,000  
Revolving Credit Facility | Amount before increase | Foreign          
Debt Obligations          
Maximum borrowing capacity sublimit       $ 10,000  
Term Loan          
Debt Obligations          
Current borrowings     $ 8,938   8,219
Interest rate at period end (as a percent) 2.40%   2.40%    
Long-term debt     $ 26,313   28,906
Effective rate (as a percent) 2.67%   2.67%    
Maximum borrowing capacity     $ 50,000    
Debt instrument term 5 years 5 years      
China Credit Facility          
Debt Obligations          
Current borrowings     $ 1,652   1,641
Interest rate at period end (as a percent) 6.40%   6.40%    
Maximum borrowing capacity ¥ 12,000   $ 1,860    
Average outstanding borrowings 10,650 $ 1,630      
Available borrowing capacity ¥ 1,350   210    
Subordinated Notes          
Debt Obligations          
Long-term debt     $ 30,000   $ 30,000
Interest rate (as a percent) 14.50%   14.50%   14.50%
Interest rate payable in cash (as a percent) 13.00%   13.00%   13.00%
Interest rate payable in-kind (as a percent) 1.50%   1.50%   1.50%
Principal amount of debt borrowed     $ 30,000    
Percentage of principal amount of notes that may prepay 100.00% 100.00%