Quarterly Financial Information (parenthetical) (Detail) - USD ($)	3 Months Ended		4 Months Ended	12 Months Ended
	Oct. 07, 2017	Jul. 15, 2017	Apr. 22, 2017	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Schedule Of Quarterly Financial Information [Line Items]
Net cash provided by operating activities				$ 297,389,000	$ 356,562,000	$ 335,674,000
Understatement of cash flows used in investing activities				$ (35,395,000)	(76,714,000)	(469,815,000)
Revisions
Schedule Of Quarterly Financial Information [Line Items]
Net cash provided by operating activities	$ (12,800)	$ (12,100)	$ (5,900)		6,667,000	8,239,000
Understatement of cash flows used in investing activities	$ (12,800)	$ (12,100)	$ (5,900)		$ (6,667,000)	$ (8,239,000)