Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 727,946	$ 745,447	$ 789,564
Property, plant and equipment, net	234,646	255,035
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	177,198	261,478	286,380
Property, plant and equipment, net	44,274	55,120
MEXICO
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	550,748	483,969	$ 503,184
Property, plant and equipment, net	$ 190,372	$ 199,915