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INTANGIBLE ASSETS - Summary of future approximate aggregate amortization expense (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Finite-Lived Intangible Assets, Net [Abstract]    
2013 $ 3,475  
2014 2,438  
2015 1,779  
2016 1,094  
2017 1,029  
Beyond 1,205  
Intangible assets, net $ 11,020 $ 9,459