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Restructuring and Business Realignment (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 2,617 $ 1,029 $ 1,578  
Electronics [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring reserve 273 458 733 $ 780
Restructuring charges 59 183 494  
Control Devices [Member]        
Restructuring Cost and Reserve [Line Items]        
Business realignment charges 0 0 0  
Restructuring expense 0 0 0  
Facility Closing [Member] | Electronics [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring reserve 273 458    
Facility Closing [Member] | Other Noncurrent Liabilities [Member] | Electronics [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring reserve 0 313    
Selling, General and Administrative Expenses [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 1,080 528 559  
Selling, General and Administrative Expenses [Member] | Electronics [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 59 183 494  
Selling, General and Administrative Expenses [Member] | Corporate [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges   309    
Cost of Sales [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 437 $ 172 $ 847