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Revenue (Revenue by Segment and Geographical Location) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Disaggregation of Revenue [Line Items]    
Total net sales $ 218,297 $ 225,930
North America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 119,367 124,429
South America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 17,332 20,545
Europe [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 71,354 71,435
Asia Pacific [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 10,244 9,521
Control Devices [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 110,119 115,357
Control Devices [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 96,720 104,443
Control Devices [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 4,412 2,891
Control Devices [Member] | Asia Pacific [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 8,987 8,023
Electronics [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 90,846 90,028
Electronics [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 22,647 19,986
Electronics [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 66,942 68,544
Electronics [Member] | Asia Pacific [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 1,257 1,498
PST [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 17,332 20,545
PST [Member] | South America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales $ 17,332 $ 20,545