Accrued Closure Costs and ARO - Schedule of Asset Retirement Obligations (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Asset Retirement Obligation Disclosure [Abstract] | ||
| Balance at beginning | $ 4,148 | $ 2,575 |
| Amortization of closure and post-closure asset | (1,071) | (760) |
| Adjustment to closure and post-closure asset | 1,257 | 2,333 |
| Impairment of closure and post-closure asset | (413) | |
| Balance at end | $ 3,921 | $ 4,148 |
| X | ||||||||||
- Definition Represents the additions or adjustments for the period in the amount of closure and post-closure assets of disposal facilities. No definition available.
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| X | ||||||||||
- Definition Represents the amortization for the period in the amount of closure and post-closure asset of disposal facilities. No definition available.
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| X | ||||||||||
- Definition Represents the carrying amount of closure and post closure assets of disposal facilities. No definition available.
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| X | ||||||||||
- Definition Refers to impairment of closure and post-closure asset. No definition available.
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| X | ||||||||||
- References No definition available.
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