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Supplemental Cash Flow Disclosure (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Conversion [Line Items]
Interest paid		$ 5,300	$ 3,919
Income taxes paid		36	47
Income tax refunds		8	83
Legal and financial advisory fees	$ 24	72
8.00% Contingent Convertible Senior Notes Due 2022 [Member]
Debt Conversion [Line Items]
Debt Instrument, Fee Amount			600
Discount on debt	600	600	600
Additional paid-in capital [Member]
Debt Conversion [Line Items]
Redemption of non-controlling interest, net		(139)	153
Accumulated Other Comprehensive Income (Loss) [Member]
Debt Conversion [Line Items]
Redemption of non-controlling interest, net		14	(14)
Non-controlling Interest [Member]
Debt Conversion [Line Items]
Redemption of non-controlling interest, net		125	(139)
Daniel G. Cohen [Member]
Debt Conversion [Line Items]
Legal and financial advisory fees			$ 600
Contingent Convertible Senior Notes [Member] | 8.00% Contingent Convertible Senior Notes Due 2022 [Member]
Debt Conversion [Line Items]
Principal amount of debt outstanding	$ 15,000	15,000		$ 15,000
Daniel G. Cohen [Member]
Debt Conversion [Line Items]
Legal and financial advisory fees		$ 600

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