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Revenue (Revenue by Segment and Geographical Location) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Disaggregation of Revenue [Line Items]        
Total net sales $ 222,241 $ 220,602 $ 440,538 $ 446,532
North America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 123,293 120,885 242,660 245,314
South America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 16,614 20,333 33,946 40,878
Europe [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 70,254 71,080 141,608 142,515
Asia Pacific [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 12,080 8,304 22,324 17,825
Control Devices [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 114,067 109,956 224,186 225,313
Control Devices [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 98,066 98,564 194,786 203,007
Control Devices [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 5,456 3,669 9,868 6,560
Control Devices [Member] | Asia Pacific [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 10,545 7,723 19,532 15,746
Electronics [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 91,560 90,313 182,406 180,341
Electronics [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 25,227 22,321 47,874 42,307
Electronics [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 64,798 67,411 131,740 135,955
Electronics [Member] | Asia Pacific [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 1,535 581 2,792 2,079
PST [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 16,614 20,333 33,946 40,878
PST [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 16,614 $ 20,333 $ 33,946 $ 40,878