INTANGIBLE ASSETS - Summary of intangible assets other than goodwill (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 45,227 $ 28,893
Accumulated Amortization (19,150) (16,895)
Net Book Value 26,077 11,998
Purchased and developed software
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted Remaining Average Useful Lives 1 year 9 months 18 days  
Gross Carrying Amount 9,710 8,836
Accumulated Amortization (5,048) (3,706)
Net Book Value 4,662 5,130
Software in development
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,556 1,251
Accumulated Amortization      
Net Book Value 1,556 1,251
Total software
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 11,266 10,087
Accumulated Amortization (5,048) (3,706)
Net Book Value 6,218 6,381
Licenses
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted Remaining Average Useful Lives 6 months  
Gross Carrying Amount 12,728 12,646
Accumulated Amortization (11,744) (11,415)
Net Book Value 984 1,231
Customer relationships
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted Remaining Average Useful Lives 9 years 1 month 6 days  
Gross Carrying Amount 8,287 2,231
Accumulated Amortization (885) (602)
Net Book Value 7,402 1,629
Technologies
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted Remaining Average Useful Lives 13 years 10 months 24 days  
Gross Carrying Amount 4,998   
Accumulated Amortization (57)   
Net Book Value 4,941   
Patents and trademarks
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted Remaining Average Useful Lives 4 years 6 months  
Gross Carrying Amount 4,005 3,260
Accumulated Amortization (1,416) (1,172)
Net Book Value 2,589 2,088
Trade names
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted Remaining Average Useful Lives Indefinite  
Gross Carrying Amount 3,632   
Net Book Value 3,632   
Other
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 311 669
Accumulated Amortization      
Net Book Value 311 669
Total Other Intangibles
   
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 33,961 18,806
Accumulated Amortization (14,102) (13,189)
Net Book Value $ 19,859 $ 5,617