DERIVATIVE FINANCIAL INSTRUMENTS (Details 1) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
|---|---|---|---|
| Copper Commodity Forward Contracts | |||
| Derivative [Line Items] | |||
| Notional amount | $ 37.3 | $ 43.6 | $ 45.7 |
| Zinc Commodity Forward Contracts | |||
| Derivative [Line Items] | |||
| Notional amount | 7.1 | 8.7 | 9.0 |
| Lead Commodity Forward Contracts | |||
| Derivative [Line Items] | |||
| Notional amount | 5.5 | 9.3 | 12.8 |
| Natural Gas Commodity Forward Contracts | |||
| Derivative [Line Items] | |||
| Notional amount | $ 51.4 | $ 2.0 | $ 3.3 |