ACCRUED ENVIRONMENTAL REMEDIATION COSTS (Accrued Environmental Remediation Costs) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	$ 17,864	$ 9,048
Continuing Operations [Member]
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	6,876	4,919
Discontinued Operations [Member]
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	$ 10,988	$ 4,129