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RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Related Party Transaction [Line Items]          
Related Party Transaction, Revenues from Transactions with Related Party $ 0.3 $ 0.3 $ 1.0 $ 1.3  
Related Party Transaction, Due from (to) Related Party 0.2   0.2   $ 0.2
Related Party Transaction, Expenses from Transactions with Related Party $ 0.4 0.7 $ 1.4 $ 1.4  
Equity Method Investment, Ownership Percentage 21.40%   21.40%    
OTR Group [Member]          
Related Party Transaction [Line Items]          
Related Party Transaction, Purchases from Related Party $ 0.1 $ 0.2 $ 0.4    
Valuepart and Track Solutions PTY Ltd. [Member]          
Related Party Transaction [Line Items]          
Related Party Transaction, Revenues from Transactions with Related Party $ 0.0   $ 0.2