PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
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| Property, Plant and Equipment [Abstract] | ||||
| Depreciation and depletion | $ 21.2 | $ 25.7 | $ 43.8 | $ 59.5 |
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets or depleting assets to periods that benefit from use of the assets. No definition available.
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| X | ||||||||||
- References No definition available.
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