Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015	Dec. 27, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 186,065	$ 173,729
Property, plant and equipment, net	230,406		$ 234,646
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	37,396	43,619
Property, plant and equipment, net	42,691		44,274
MEXICO
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	148,669	$ 130,110
Property, plant and equipment, net	$ 187,715		$ 190,372