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Revenue (Revenue by Segment and Geographical Location) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disaggregation of Revenue [Line Items]    
Total net sales $ 225,930 $ 204,311
North America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 124,429 123,386
South America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 20,545 21,633
Europe [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 71,435 51,783
Asia Pacific [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 9,521 7,509
Control Devices [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 115,357 118,873
Control Devices [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 104,443 110,521
Control Devices [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 2,891 1,709
Control Devices [Member] | Asia Pacific [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 8,023 6,643
Electronics [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 90,028 63,805
Electronics [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 19,986 12,865
Electronics [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 68,544 50,074
Electronics [Member] | Asia Pacific [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 1,498 866
PST [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 20,545 21,633
PST [Member] | South America [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales $ 20,545 $ 21,633