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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Depreciation and Amortization) (Details)
12 Months Ended
Dec. 31, 2018
Acquired Intangibles | Minimum  
Property, Plant and Equipment [Line Items]  
Useful lives (in years) 7 years
Acquired Intangibles | Maximum  
Property, Plant and Equipment [Line Items]  
Useful lives (in years) 25 years
Furniture, equipment and capitalized software | Minimum  
Property, Plant and Equipment [Line Items]  
Estimated useful life (in years) 3 years
Furniture, equipment and capitalized software | Maximum  
Property, Plant and Equipment [Line Items]  
Estimated useful life (in years) 5 years