Business Segments - Net Sales by Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 25, 2017	Jun. 30, 2018	Jun. 25, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES	$ 388,944	$ 240,628	$ 775,392	$ 414,848
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES	30,527	34,435	61,010	66,223
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES	174,231	152,463	347,898	294,895
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES	70,968	19,913	142,193	19,913
Poland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES	$ 113,218	$ 33,817	$ 224,291	$ 33,817