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GOODWILL AND INTANGIBLES - Schedule of Amortization Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization expense $ 1.0  
2018 1.0  
2019 1.0  
2020 1.1  
2021 0.7  
2022 and after 0.6  
Net Book Value $ 4.4 $ 5.4