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Revenue (Revenue by Segment and Geographical Location) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue [Line Items]        
Total net sales $ 203,386 $ 208,853 $ 643,924 $ 655,385
North America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 115,816 119,475 358,476 364,789
South America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 16,542 18,864 50,488 59,742
Europe [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 59,634 62,489 201,242 205,004
Asia Pacific [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 11,394 8,025 33,718 25,850
Control Devices [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 108,690 108,402 332,876 333,715
Control Devices [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 92,743 97,017 287,529 300,024
Control Devices [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 6,046 4,174 15,914 10,734
Control Devices [Member] | Asia Pacific [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 9,901 7,211 29,433 22,957
Electronics [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 78,154 81,587 260,560 261,928
Electronics [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 23,073 22,458 70,947 64,765
Electronics [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 53,588 58,315 185,328 194,270
Electronics [Member] | Asia Pacific [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 1,493 814 4,285 2,893
PST [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 16,542 18,864 50,488 59,742
PST [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 16,542 $ 18,864 $ 50,488 $ 59,742