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Revenue (Revenue by Segment and Geographical Location) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | $ 208,853 | $ 203,582 | $ 655,385 | $ 617,004
North America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 119,475 | 113,402 | 364,789 | 358,275
South America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 18,864 | 25,386 | 59,742 | 70,519
Europe [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 62,489 | 55,199 | 205,004 | 164,179
Asia Pacific [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 8,025 | 9,595 | 25,850 | 24,031
Control Devices [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 108,402 | 106,842 | 333,715 | 339,716
Control Devices [Member] | North America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 97,017 | 96,314 | 300,024 | 312,320
Control Devices [Member] | Europe [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 4,174 | 2,009 | 10,734 | 5,657
Control Devices [Member] | Asia Pacific [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 7,211 | 8,519 | 22,957 | 21,739
Electronics [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 81,587 | 71,354 | 261,928 | 206,769
Electronics [Member] | North America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 22,458 | 17,088 | 64,765 | 45,955
Electronics [Member] | Europe [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 58,315 | 53,190 | 194,270 | 158,522
Electronics [Member] | Asia Pacific [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 814 | 1,076 | 2,893 | 2,292
PST [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | 18,864 | 25,386 | 59,742 | 70,519
PST [Member] | South America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales | $ 18,864 | $ 25,386 | $ 59,742 | $ 70,519

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