Information Regarding Reportable Business Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jun. 25, 2022	Jul. 01, 2023	Jun. 25, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 1,373,857	$ 1,975,064	$ 2,809,532	$ 3,945,663
Investment income	2,484	586	3,852	1,307
Operating income	87,950	150,418	189,234	313,251
Expenditures on long-lived assets	6,398	3,858	12,631	7,467
Goodwill	42,166	40,977	42,166	40,977	$ 41,220
Internal revenue [Member]
Segment Reporting Information [Line Items]
Revenue	40,217	39,986	52,178	52,870
Transportation Logistics
Segment Reporting Information [Line Items]
Revenue	1,355,593	1,955,219	2,772,439	3,906,558
Operating income	72,691	139,944	158,853	291,890
Expenditures on long-lived assets	6,398	3,858	12,631	7,467
Goodwill	42,166	40,977	42,166	40,977
Insurance
Segment Reporting Information [Line Items]
Revenue	18,264	19,845	37,093	39,105
Investment income	2,484	586	3,852	1,307
Operating income	15,259	10,474	30,381	21,361
Insurance | Internal revenue [Member]
Segment Reporting Information [Line Items]
Revenue	$ 40,217	$ 39,986	$ 52,178	$ 52,870