Accumulated Other Comprehensive Income Loss - Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 352,097	$ 318,452	$ 270,678
Tax effect	$ 63	$ 11,800	15,297
Income tax allocation			1,600
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			126
Tax effect			(50)
Amounts Reclassified From Accumulated Other Comprehensive Loss [Member] | Interest Rate Swap [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax allocation			$ 1,595