Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Revenue	$ 1,213,867	$ 1,289,345	$ 3,609,915	$ 4,098,877
Investment income	3,922	3,022	10,988	6,874
Costs and expenses:
Purchased transportation	943,805	986,743	2,799,384	3,141,234
Commissions to agents	98,703	115,244	295,801	363,397
Other operating costs, net of gains on asset sales/dispositions	15,144	15,158	44,138	40,998
Insurance and claims	30,398	29,540	83,830	86,971
Selling, general and administrative	51,252	50,975	162,613	159,071
Depreciation and amortization	15,371	14,359	44,001	44,498
Total costs and expenses	1,154,673	1,212,019	3,429,767	3,836,169
Operating income	63,116	80,348	191,136	269,582
Interest and debt (income) expense	(1,169)	(1,046)	(4,455)	(2,079)
Income before income taxes	64,285	81,394	195,591	271,661
Income taxes	14,252	19,741	45,838	65,254
Net income	$ 50,033	$ 61,653	$ 149,753	$ 206,407
Basic earnings per share	$ 1.41	$ 1.71	$ 4.21	$ 5.74
Diluted earnings per share	$ 1.41	$ 1.71	$ 4.21	$ 5.74
Average basic shares outstanding	35,420,000	35,951,000	35,608,000	35,958,000
Average diluted shares outstanding	35,420,000	35,951,000	35,608,000	35,958,000
Dividends per common share	$ 0.36	$ 0.33	$ 1.02	$ 0.93