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GOODWILL AND OTHER INTANGIBLE ASSETS (Future Amortization) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization expense, intangible assets $ 2.2 $ 2.1
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2018 8.8  
2019 8.6  
2020 8.5  
2021 8.1  
2022 $ 7.9