Income Taxes - Reconciliation of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Assets:
Inventories	$ 8,685	$ 7,989
Accounts receivable	18,954	15,652
Accrued expenses	2,435	1,780
Other	214	197
Gross deferred tax assets	30,288	25,618
Liabilities:
Depreciation	13,207	13,406
Goodwill and intangible assets	9,524	9,761
Gross deferred tax liabilities	22,731	23,167
Net deferred tax assets	$ 7,557	$ 2,451