Supplemental Disclosures of Cash Flow Information - Significant Noncash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Noncash Investing And Financing Activities [Line Items]
Estimated fair value related to the divestiture of the Deep South and Somerset Exchange Business and the Florence and Laurel Distribution Business	$ 151,434
Additions to property, plant and equipment accrued and recorded in accounts payable, trade	22,329	$ 15,704	$ 14,006
Gain on acquisition of Southeastern Container preferred shares in CCR redistribution	6,012
Accounts receivable from The Coca-Cola Company for adjustments to the cash purchase price for the April 2017 Transactions	4,707
Capital lease obligations incurred	2,233		3,361
Class B Common Stock [Member]
Noncash Investing And Financing Activities [Line Items]
Issuance of Class B Common Stock in connection with stock award	$ 3,669	$ 3,726	$ 2,225