Property, Plant And Equipment (Long-Lived Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Long-lived assets	$ 617,960	$ 553,732
United States
Property, Plant and Equipment [Line Items]
Long-lived assets	366,059	346,343
Germany
Property, Plant and Equipment [Line Items]
Long-lived assets	86,881	81,218
Russia
Property, Plant and Equipment [Line Items]
Long-lived assets	84,471	76,359
China
Property, Plant and Equipment [Line Items]
Long-lived assets	8,933	9,123
Other
Property, Plant and Equipment [Line Items]
Long-lived assets	$ 71,616	$ 40,689