ACCRUED ENVIRONMENTAL REMEDIATION COSTS (Accrued Environmental Remediation Costs) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accrued Environmental Remediation Costs [Line Items]
Accrued Environmental Remediation Costs	$ 9,048	$ 10,683
Continuing Operations [Member]
Accrued Environmental Remediation Costs [Line Items]
Accrued Environmental Remediation Costs	4,919	5,505
Discontinued Operations [Member]
Accrued Environmental Remediation Costs [Line Items]
Accrued Environmental Remediation Costs	$ 4,129	$ 5,178