ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Environmental Remediation Obligations [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Environmental Loss Contingencies and Asset Retirement Obligations [Table Text Block] |
The following is a summary of our environmental and mine closure obligations:
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| Asset Retirement Obligations |
The following represents a roll forward of our asset retirement obligation liability for the years ended:
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- Definition Schedule of Environmental Loss Contingencies and Asset Retirement Obligations [Table Text Block] No definition available.
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- References No definition available.
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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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