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GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Amortization of acquired intangible assets $ 2,940 $ 5,400
Minimum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 1 year  
Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 5 years