INTANGIBLE ASSETS - Summary of Intangible assets other than goodwill (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 28,893 $ 24,147
Accumulated Amortization (16,895) (13,494)
Net Book Value 11,998 10,653
Purchased and developed software
   
Finite-Lived Intangible Assets [Line Items]    
Remaining Useful Lives 2 years 1 month 6 days  
Gross Carrying Amount 8,836 5,411
Accumulated Amortization (3,706) (1,815)
Net Book Value 5,130 3,596
Patents and trademarks
   
Finite-Lived Intangible Assets [Line Items]    
Remaining Useful Lives 5 years 3 months 18 days  
Gross Carrying Amount 3,260 2,456
Accumulated Amortization (1,172) (803)
Net Book Value 2,088 1,653
Customer relationships
   
Finite-Lived Intangible Assets [Line Items]    
Remaining Useful Lives 4 years 8 months 12 days  
Gross Carrying Amount 2,231 1,966
Accumulated Amortization (602) (294)
Net Book Value 1,629 1,672
Licenses and other intangible assets
   
Finite-Lived Intangible Assets [Line Items]    
Remaining Useful Lives 1 year  
Gross Carrying Amount 12,646 12,816
Accumulated Amortization (11,415) (10,582)
Net Book Value 1,231 2,234
Software and other intangible assets in development and not in service
   
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,920 1,498
Accumulated Amortization      
Net Book Value $ 1,920 $ 1,498