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Information Regarding Reportable Business Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023	Dec. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 1,225,005	$ 1,373,857	$ 2,396,048	$ 2,809,532
Investment income	3,654	2,484	7,066	3,852
Operating income	68,059	87,950	128,020	189,234
Expenditures on long-lived assets	7,497	6,398	16,778	12,631
Goodwill	41,607	42,166	41,607	42,166	$ 42,275
Related Party
Segment Reporting Information [Line Items]
Revenue	41,277	40,217	53,346	52,178
Transportation Logistics
Segment Reporting Information [Line Items]
Revenue	1,209,075	1,355,593	2,363,607	2,772,439
Operating income	50,771	72,691	93,452	158,853
Expenditures on long-lived assets	7,497	6,398	16,778	12,631
Goodwill	41,607	42,166	41,607	42,166
Insurance
Segment Reporting Information [Line Items]
Revenue	15,930	18,264	32,441	37,093
Investment income	3,654	2,484	7,066	3,852
Operating income	17,288	15,259	34,568	30,381
Insurance | Related Party
Segment Reporting Information [Line Items]
Revenue	$ 41,277	$ 40,217	$ 53,346	$ 52,178

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