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GOODWILL AND INTANGIBLE ASSETS - TEXTUALS (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill [Line Items]        
Goodwill, Purchase Accounting Adjustments $ 15.2      
Finite-Lived Intangible Assets, Amortization Expense   $ 39.1 $ 36.9 $ 39.0