Basis of Presentation (Additional Cash Flow Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Non-cash operating items:
Equity in net (income) loss of affiliates	$ (5,094)	$ (139,714)
Deferred taxes	(1,141)	12,171
Depreciation and amortization	5	15
Amortization of prior service credit and actuarial (gain) loss	269	239
Net non-cash operating items - continuing operations	(5,961)	(127,289)
Continuing Operations [Member]
Supplemental information:
Interest paid	5	5
Tax payments (refunds)	$ (181)	(144)
Discontinued Operations [Member]
Supplemental information:
Interest paid		$ 55