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GOODWILL (NARRATIVE) (DETAILS) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 01, 2014
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Fair Value Measurements, Significant Assumptions                 The process of evaluating the fair value of the reporting units is highly subjective and requires significant judgment and estimates as the reporting units operate in a number of markets and geographical regions. We used an income approach to determine our best estimates of fair value which incorporated the following significant assumptions:Revenue projections, including revenue growth during the forecast periods ranging from 3% to 20%;EBITDA margin projections held relatively flat over the forecast periods ranging from 10% to 20%;Estimated income tax rates of 10% to 40%;Estimated capital expenditures ranging from $0.1 million to $30 million; andDiscount rates ranging from 11.6% to 15.8% based on various inputs, including the risks associated with the specific reporting units, the country of operations as well as their revenue growth and EBITDA margin assumptions.      
Impairment losses $ 5,034 $ 3,066 $ 0 $ 0 $ 373 $ 0 $ 0 $ 0 $ 8,100 $ 373 $ 1,205  
Revana [Member]                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Fair value of a reporting unit in excess of carrying value expressed as a percentage   23.00%                   6.00%
WebMetro [Member]                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Fair value of a reporting unit in excess of carrying value expressed as a percentage                       11.00%
Discount rate                 17.00%      
Impairment losses 600 $ 3,100     $ 2,300              
WebMetro [Member] | 2016 - 2019                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Growth rate                 20.00%      
WebMetro [Member] | After 2019                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Growth rate                 4.00%      
Latin America [Member]                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Discount rate                 15.80%      
Impairment losses $ 1,800                      
Latin America [Member] | 2016                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Growth rate                 22.00%      
Latin America [Member] | 2017 - 2020                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Growth rate                 6.00%      
Latin America [Member] | After 2020                        
ValuationAllowanceForImpairmentOfRecognizedServicingAssetsLineItems                        
Growth rate                 4.00%