Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 421,282	$ 393,843
Less allowances for depreciation	(347,651)	(323,110)
Net property, plant and equipment	73,631	70,733
Depreciation expense	25,801	27,284	$ 29,024
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,686	2,686
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	62,781	55,076
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	302,241	285,869
Dies and Tools [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 53,574	$ 50,212