Income Taxes (Expense (Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 453	$ 189	$ (425)
State and local	(130)	162	89
Foreign	6,378	8,982	4,615
Current Income Tax Expense (Benefit)	6,701	9,333	4,279
Deferred:
Federal	(2,638)	197	(257)
State and local	(123)	(35)	(1)
Foreign	205	849	2,148
Deferred income tax expense (benefit)	(2,556)	1,011	1,890
Total income tax expense	$ 4,145	$ 10,344	$ 6,169