Consolidated Condensed Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Condensed Statements Of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ (290)	$ 1,903	$ (4,544)	$ 4,679
Realized foreign currency translation loss from discontinued operations previously unrealized, net of taxes of $0			280
Unrealized foreign currency translation adjustment from continuing operations, net of taxes of $0	9	9	(10)	(171)
Interest rate swap, net of taxes of $0		(4)		(1)
Investment in partnerships, net of taxes of $0			118
Pension and postretirement obligations, net of taxes of $0	5	5	15	15
Comprehensive income (loss)	$ (276)	$ 1,913	$ (4,141)	$ 4,522

Other Comprehensive Income Loss Investment in Partnership, Net of Tax

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Realized Foreign Currency Translation Loss From Discontinued Operations Previously Unrealized, Net Of Taxes

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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