Property, Plant and Equipment (Schedule of Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 532,324	$ 517,711
Less: accumulated depreciation	(240,004)	(229,167)
Total property, plant and equipment, net	292,320	288,544
Land
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	7,171	7,333
Buildings and Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 128,387	126,576
Buildings and Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Buildings and Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 375,860	377,782
Machinery and Equipment | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Machinery and Equipment | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	25 years
Construction in Progress
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 20,906	$ 6,020