Significant Components of Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Deferred tax assets:
Accrued expenses	$ 2,484	$ 6,488
Stock-based compensation expense	4,175	5,929
Inventory	435	1,117
Other	2,598	4,097
Total deferred tax assets	9,692	17,631
Valuation allowance	(439)	(669)
Total deferred tax assets net of valuation allowance	9,253	16,962
Deferred tax liabilities:
Property, plant and equipment	(42,076)	(72,140)
Prepaid expenses	(1,341)	(1,204)
Goodwill	(655)	(879)
Total deferred tax liabilities	(44,072)	(74,223)
Net deferred tax liabilities	$ (34,819)	$ (57,261)