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Business Realignment and Restructuring (Schedule of Business Realignment Charges Classified by Statement of Operations) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges $ 1,135 $ 222
Selling, General and Administrative Expenses [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges 1,125 222
Severance costs 613  
Design and Development Expense [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges 10  
Control Devices [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges 522  
Electronics [Member] | Selling, General and Administrative Expenses [Member]    
Restructuring Cost and Reserve [Line Items]    
Severance costs 512  
Electronics [Member] | Design and Development Expense [Member]    
Restructuring Cost and Reserve [Line Items]    
Severance costs 10  
PST Segment [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges   222
Unallocated Corporate [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges $ 613  
Unallocated Corporate [Member] | Selling, General and Administrative Expenses [Member]    
Restructuring Cost and Reserve [Line Items]    
Severance costs   $ 222