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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Line Items]
Net operating loss carryforwards	$ 43,900	$ 37,300
Accrued interest payable related to uncertain tax positions	131	$ 163
Undistributed earnings of domestic subsidiaries	35,100
Additional taxes if interest in all businesses is sold rather than to effect a tax-free liquidation	$ 8,400
Maximum [Member]
Income Taxes [Line Items]
Net operating losses expiration year	2041
Minimum [Member]
Income Taxes [Line Items]
Net operating losses expiration year	2026

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Income Taxes [Line Items]

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Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of domestic subsidiaries.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of undistributed earnings of domestic subsidiaries or domestic joint ventures intended to be permanent.

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