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CLOSURE AND POST-CLOSURE LIABILITIES (Anticipated Payments) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Environmental Property Sale, Disposal or Abandonment Costs |  |  |
2019 | $ 10,574 |  |
2020 | 9,424 |  |
2021 | 10,941 |  |
2022 | 7,626 |  |
2023 | 9,264 |  |
Thereafter | 271,314 |  |
Undiscounted closure and post-closure liabilities | 319,143 |  |
Less: Discount at credit-adjusted risk-free rate | (155,999) |  |
Less: Undiscounted estimated closure and post-closure liabilities relating to airspace not yet consumed | (93,213) |  |
Present value of closure and post-closure liabilities | $ 69,931 | $ 61,037 | $ 58,331

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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- References No definition available. + Details
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