Segments (Company’s approximate percentage of net sales by geographic region) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of net sales	65.00%	71.00%	72.00%
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of net sales	10.00%	8.00%	7.00%
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of net sales	9.00%	8.00%	8.00%
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of net sales	8.00%	6.00%	6.00%
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of net sales	7.00%	6.00%	6.00%
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of net sales	1.00%	1.00%	1.00%