Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021
Revenue	$ 5,303,322	$ 7,436,562	$ 6,537,568
Investment income	10,141	3,162	2,857
Costs and expenses:
Purchased transportation	4,068,262	5,804,017	5,114,667
Commissions to agents	462,668	614,865	507,209
Other operating costs, net of gains on asset sales/dispositions	54,191	45,192	36,531
Insurance and claims	114,241	125,835	105,463
Selling, general and administrative	211,799	221,279	221,278
Depreciation and amortization	58,153	57,453	49,609
Total costs and expenses	4,969,314	6,868,641	6,034,757
Operating income	344,149	571,083	505,668
Interest and debt (income) expense	(3,946)	3,620	3,976
Income before income taxes	348,095	567,463	501,692
Income taxes	83,701	136,549	120,168
Net income	$ 264,394	$ 430,914	$ 381,524
Basic earnings per share	$ 7.36	$ 11.76	$ 9.98
Diluted earnings per share	$ 7.36	$ 11.76	$ 9.98
Average basic shares outstanding	35,920,000	36,633,000	38,235,000
Average diluted shares outstanding	35,920,000	36,633,000	38,235,000
Dividends per common share	$ 3.26	$ 3.1	$ 2.92