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REMEDIAL LIABILITIES (Anticipated Payments) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Accrual for Environmental Loss Contingencies, Net [Abstract] |  |  |
2019 | $ 13,975 |  |
2020 | 15,467 |  |
2021 | 14,593 |  |
2022 | 9,560 |  |
2023 | 8,688 |  |
Thereafter | 81,453 |  |
Undiscounted remedial liabilities | 143,736 |  |
Less: Discount | (22,719) |  |
Total remedial liabilities | $ 121,017 | $ 124,468 | $ 128,007

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- Definition Undiscounted amount of the accrual for environmental loss contingencies expected to be paid after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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