Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 414,375		$ 385,544
Change in fair value of derivatives	(1,136)	$ (649)	(2,083)	$ (1,122)
Tax effect	(102)	151	(406)	283
Other comprehensive income (loss), net of tax	294	(440)	1,181	(824)
Ending Balance	425,632	376,348	425,632	376,348
Aluminum Forward Contracts [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in fair value of derivatives	(1,136)	(649)	(2,083)	(1,122)
Amounts reclassified from other comprehensive loss	1,532	58	3,670	15
Tax effect	(102)	151	(406)	283
Other comprehensive income (loss), net of tax	294	(440)	1,181	(824)
Accumulated Other Comprehensive Loss [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,178)		(3,065)
Other comprehensive income (loss), net of tax	294	(440)	1,181	(824)
Ending Balance	(1,884)	(824)	(1,884)	(824)
Accumulated Other Comprehensive Loss [Member] | Aluminum Forward Contracts [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,178)	(384)	(3,065)
Ending Balance	$ (1,884)	$ (824)	$ (1,884)	$ (824)