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Business Realignment and Restructuring (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2022
Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense $ 21 $ 220  
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense 285 1,654  
Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member] | Maximum [Member]      
Restructuring Cost and Reserve [Line Items]      
Estimated total cost     $ 4,200
Canton Facility Restructuring Plan [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   13  
Employee Severance [Member] | Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   50  
Employee Severance [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   76  
Fixed Asset Impairment [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   1,654  
Fixed Asset Impairment [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   185  
Other Restructuring [Member] | Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   170  
Other Restructuring [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   1,393  
Other Restructuring [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   13  
Selling, General and Administrative Expenses [Member] | Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense 19 174  
Selling, General and Administrative Expenses [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense 35 673  
Cost of Goods Sold [Member] | Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense 5 3  
Cost of Goods Sold [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense 250 900  
Design and Development Expense [Member] | Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   43  
Business realignment charges $ (3)    
Design and Development Expense [Member] | Particulate Matter Product Line Strategic Exit [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   81  
Design and Development Expense [Member] | Canton Facility Restructuring Plan [Member] | Control Devices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring expense   $ 13