Business Realignment and Restructuring (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Control Devices [Member] | Particulate Matter Product Line Strategic Exit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		$ 35	$ 0
Charge to expense	$ 285		1,654
Cash payments		(35)	(1,469)
Utilization, Non-Cash			(185)
Restructuring Reserve, Ending Balance	0	0	0
Control Devices [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		93	165
Charge to expense			13
Cash payments		(93)	(38)
Restructuring Reserve, Ending Balance	140	0	140
Control Devices [Member] | Cost of Goods Sold [Member] | Particulate Matter Product Line Strategic Exit [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	250		900
Control Devices [Member] | Selling, General and Administrative Expenses [Member] | Particulate Matter Product Line Strategic Exit [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	35		673
Control Devices [Member] | Design and Development Expense [Member] | Particulate Matter Product Line Strategic Exit [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense			81
Control Devices [Member] | Design and Development Expense [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense			13
Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			227
Charge to expense	21		220
Cash payments			(382)
Restructuring Reserve, Ending Balance	65		65
Electronics [Member] | Cost of Goods Sold [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	5		3
Electronics [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense	19		174
Electronics [Member] | Design and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense			43
Employee Severance [Member] | Control Devices [Member] | Particulate Matter Product Line Strategic Exit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		35	0
Charge to expense			76
Cash payments		(35)	(76)
Restructuring Reserve, Ending Balance	0	0	0
Employee Severance [Member] | Control Devices [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		93	165
Cash payments		(93)	(25)
Restructuring Reserve, Ending Balance	140	0	140
Employee Severance [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			227
Charge to expense			50
Cash payments			(212)
Restructuring Reserve, Ending Balance	65		65
Fixed Asset Impairment [Member] | Control Devices [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense			1,654
Fixed Asset Impairment [Member] | Control Devices [Member] | Particulate Matter Product Line Strategic Exit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		0	0
Charge to expense			185
Utilization, Non-Cash			(185)
Restructuring Reserve, Ending Balance	0	0	0
Other Restructuring [Member] | Control Devices [Member] | Particulate Matter Product Line Strategic Exit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		0	0
Charge to expense			1,393
Cash payments			(1,393)
Restructuring Reserve, Ending Balance	0	0	0
Other Restructuring [Member] | Control Devices [Member] | Canton Facility Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance		0	0
Charge to expense			13
Cash payments			(13)
Restructuring Reserve, Ending Balance	$ 0	$ 0	0
Other Restructuring [Member] | Electronics [Member]
Restructuring Cost and Reserve [Line Items]
Charge to expense			170
Cash payments			$ (170)