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Reporting Segments and Related Information - Major Customers & Products (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Sales Revenue, Goods, Net [Member] | Turbochargers [Member] |  |  |
Revenue from External Customer [Line Items] |  |  |
Concentration Risk, Percentage | 28.00% | 28.00% | 31.00%
Sales Revenue, Goods, Net [Member] | Volkswagen [Member] |  |  |
Revenue from External Customer [Line Items] |  |  |
Concentration Risk, Percentage | 13.00% | 13.00% | 15.00%
Sales Revenue, Goods, Net [Member] | Ford [Member] |  |  |
Revenue from External Customer [Line Items] |  |  |
Concentration Risk, Percentage | 15.00% | 15.00% | 15.00%
Maximum [Member] |  |  |
Revenue from External Customer [Line Items] |  |  |
Percentage of net sales | 10.00% | 10.00% | 10.00%

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