Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												4 Months Ended				12 Months Ended
	Jan. 01, 2022		Oct. 09, 2021		Jul. 17, 2021		Jan. 02, 2021		Oct. 03, 2020		Jul. 11, 2020		Apr. 24, 2021		Apr. 18, 2020		Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 983,490		$ 1,027,800		$ 1,017,309		$ 1,023,036		$ 989,650		$ 1,025,861		$ 1,302,168		$ 1,349,444		$ 4,330,767	$ 4,387,991	$ 4,123,974
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately below)	512,531	[1]	515,078	[1]	504,062	[1]	521,577	[1]	497,659	[1]	506,033	[1]	643,576	[1]	670,873	[1]	2,175,247	2,196,142	2,155,709
Net income (loss)	$ 39,322		$ 38,852		$ 56,358		$ 55,824		$ 44,347		$ 57,919		$ 71,655		$ (5,772)		$ 206,187	$ 152,318	$ 164,538
Basic net income (loss) per share	$ 0.19		$ 0.18		$ 0.27		$ 0.26		$ 0.21		$ 0.27		$ 0.34		$ (0.03)		$ 0.97	$ 0.72	$ 0.78
Diluted net income (loss) per share	$ 0.18		$ 0.18		$ 0.26		$ 0.26		$ 0.21		$ 0.27		$ 0.34		$ (0.03)		$ 0.97	$ 0.72	$ 0.78

[1] The company does not report gross margin.  This line item presents our material, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately) under an alternative presentation.