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DERIVATIVE FINANCIAL INSTRUMENTS (Details 1) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Copper Commodity Forward Contracts      
Derivative [Line Items]      
Notional amount $ 38.9 $ 35.8 $ 43.1
Zinc Commodity Forward Contracts      
Derivative [Line Items]      
Notional amount 8.0 8.0 8.5
Lead Commodity Forward Contracts      
Derivative [Line Items]      
Notional amount 1.4 3.4 9.1
Natural Gas Commodity Forward Contracts      
Derivative [Line Items]      
Notional amount $ 53.0 $ 54.4 $ 0.9