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GOODWILL AND INTANGIBLE ASSETS (DETAILS) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2014
Goodwill [Roll Forward]      
Goodwill net balance, opening $ 47,148    
Acquisition of Ternian, goodwill 0    
Foreign currency translation adjustment, goodwill 0    
Goodwill net balance, closing 47,148    
Goodwill, gross   $ 42,237  
Accumulated foreign currency translation adjustment, goodwill   4,911  
Goodwill, net 47,148 47,148  
Intangible Assets with an Indefinite Life [Roll Forward]      
Intangible assets with an indefinite life net balance, opening 26,036    
Acquisition of Ternian, intangible assets with an indefinite life 0    
Foreign currency translation adjustment, intangible assets with an indefinite life 0    
Intangible assets with an indefinite life net balance, closing 26,036    
Intangible assets with an indefinite life, gross   26,036  
Accumulated foreign currency translation adjustment, intangible assets with an indefinite life   0  
Intangible assets with an indefinite life, net 26,036 26,036  
Intangible Assets with a Finite Life [Roll Forward]      
Intangible assets with a finite life net balance, opening 15,776    
Amortization, intangible assets with a finite life (1,280)    
Foreign currency translation adjustment, intangible assets with a finite life 43    
Intangible assets with a finite life net balance, closing 27,869    
Intangible assets with a finite life, gross   48,926  
Accumulated amortization, intangible assets with a finite life   (26,863)  
Accumulated foreign currency translation adjustment, intangible assets with a finite life   5,806  
Intangible assets with a finite life, net 15,776 27,869  
Goodwill and Intangible Assets [Roll Forward]      
Goodwill and intangible assets net balance, opening 88,960    
Amortization, intangible assets with a finite life (1,280)    
Foreign currency translation adjustment, goodwill and intangible assets 43    
Goodwill and intangible assets net balance, closing 101,053    
Goodwill and intangible assets, gross   117,199  
Accumulated amortization, intangible assets with a finite life   (26,863)  
Accumulated foreign currency translation, goodwill and intangible assets   10,717  
Goodwill and intangible assets, net 88,960 $ 101,053 $ 90,025
Ternian [Member]      
Intangible Assets with a Finite Life [Roll Forward]      
Acquisition of Ternian, intangible assets with a finite life 13,330    
Goodwill and Intangible Assets [Roll Forward]      
Acquisition of Ternian, goodwill and intangible assets $ 13,330