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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Financing arrangements - Credit Facility) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2014
Dec. 31, 2016
Credit Facility    
Financing Arrangements    
Term loan balance refinanced with revolving credit facility $ 70.0  
Maximum borrowing capacity   $ 150.0
Additional borrowing capacity that may be requested   75.0
Letters of Credit, Sub-Facility    
Financing Arrangements    
Maximum borrowing capacity   $ 20.0