ACCRUED ENVIRONMENTAL REMEDIATION COSTS (Accrued Environmental Remediation Costs) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	$ 32,488	$ 19,852
Continuing Operations [Member]
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	21,784	9,136
Retained From Former Chemicals Business [Member]
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	$ 10,704	$ 10,716