Segments (Percentage of Net Sales by Product Line) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Product Information [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%
Supply Technologies
Product Information [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%
Supply Technologies | Supply Technologies
Product Information [Line Items]
Percentage of net sales	85.00%	87.00%	88.00%
Supply Technologies | Engineered specialty products
Product Information [Line Items]
Percentage of net sales	15.00%	13.00%	12.00%
Assembly Components
Product Information [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%
Assembly Components | Fuel, rubber and plastic products
Product Information [Line Items]
Percentage of net sales	67.00%	59.00%	57.00%
Assembly Components | Aluminum products
Product Information [Line Items]
Percentage of net sales	33.00%	41.00%	43.00%
Engineered Products
Product Information [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%
Engineered Products | Industrial equipment business
Product Information [Line Items]
Percentage of net sales	79.00%	81.00%	78.00%
Engineered Products | Forged and machined products
Product Information [Line Items]
Percentage of net sales	21.00%	19.00%	22.00%