Information Regarding Reportable Business Segments (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Segment Reporting Information [Line Items]
External revenue	$ 7,436,562,000	$ 6,537,568,000	$ 4,132,981,000
Internal revenue	79,229,000	62,558,000	54,003,000
Investment income	3,162,000	2,857,000	3,399,000
Interest and debt expense	3,620,000	3,976,000	3,953,000
Depreciation and amortization	57,453,000	49,609,000	45,855,000
Operating income	571,083,000	505,668,000	252,950,000
Expenditures on long-lived assets	26,005,000	23,261,000	30,626,000
Goodwill	41,220,000	40,768,000	40,949,000
Finance lease additions	30,659,000	48,674,000	31,633,000
Total assets	1,931,879,000	2,045,465,000	1,653,799,000
Transportation Logistics
Segment Reporting Information [Line Items]
External revenue	7,358,008,000	6,465,711,000	4,076,519,000
Interest and debt expense	3,620,000	3,976,000	3,953,000
Depreciation and amortization	57,453,000	49,609,000	45,855,000
Operating income	524,500,000	464,282,000	221,210,000
Expenditures on long-lived assets	26,005,000	23,261,000	30,626,000
Goodwill	41,220,000	40,768,000	40,949,000
Finance lease additions	30,659,000	48,674,000	31,633,000
Total assets	1,704,557,000	1,736,854,000	1,301,991,000
Insurance
Segment Reporting Information [Line Items]
External revenue	78,554,000	71,857,000	56,462,000
Internal revenue	79,229,000	62,558,000	54,003,000
Investment income	3,162,000	2,857,000	3,399,000
Operating income	46,583,000	41,386,000	31,740,000
Total assets	$ 227,322,000	$ 308,611,000	$ 351,808,000