Reporting Segments and Related Information - Major Customers & Products (Details)	12 Months Ended
	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%