Accumulated Other Comprehensive Loss - Reclassification Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 81,563	$ 67,894	$ 151,786	$ 132,148
Tax expense	$ 4,223	6,316	$ 5,077	10,035
Amounts Reclassified From Accumulated Other Comprehensive Loss [Member] | Aluminum Forward Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		71		126
Tax expense		(28)		(50)
Amounts Reclassified From Accumulated Other Comprehensive Loss [Member] | Aluminum Forward Contracts [Member] | Reversal of Income Tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax expense		$ 1,595		$ 1,595