Income Taxes (Summary of Valuation Allowance) (Details) - Deferred Tax Valuation Allowance - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of January 1	$ 111	$ 298	$ 206
Cost charged to the tax provision	13	70	100
Currency translation	(41)	(248)	(10)
Currency translation	0	(9)	2
Reclassification from discontinued operations upon sale of industrial group	26,498	0	0
Balance as of December 31	$ 26,581	$ 111	$ 298