Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)

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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Impairment of intangible assets, indefinite-lived $ 0  
Amortization expense related to purchased intangible assets $ 34,100,000 $ 42,200,000