ACCRUED ENVIRONMENTAL REMEDIATION COSTS (Accrued Environmental Remediation Costs) (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
---|---|---|
Loss Contingencies [Line Items] | ||
Accrued Environmental Remediation Costs | $ 36,515 | $ 41,401 |
Continuing Operations [Member] | ||
Loss Contingencies [Line Items] | ||
Accrued Environmental Remediation Costs | 25,544 | 30,429 |
Retained From Former Chemicals Business [Member] | ||
Loss Contingencies [Line Items] | ||
Accrued Environmental Remediation Costs | $ 10,971 | $ 10,972 |