Derivative Financial Instruments - Summary of Fair Values and Classification in Consolidated Balance Sheets of Derivative Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Jan. 01, 2017
Assets:
Total assets	$ 4,420	$ 1,289
Commodity Contract [Member] | Not Designated as Hedging Instruments [Member] | Prepaid Expenses and Other Current Assets [Member]
Assets:
Total assets	$ 4,420	$ 1,289