Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Revenue	$ 1,816,132	$ 1,734,299	$ 5,761,795	$ 4,592,551
Investment income	716	706	2,023	2,138
Costs and expenses:
Purchased transportation	1,416,323	1,356,671	4,512,341	3,583,197
Commissions to agents	154,125	135,295	465,759	356,997
Other operating costs, net of gains on asset sales/dispositions	13,356	10,572	34,878	27,117
Insurance and claims	31,445	29,569	96,265	75,198
Selling, general and administrative	53,519	59,198	165,199	158,720
Depreciation and amortization	14,582	12,288	42,627	36,532
Total costs and expenses	1,683,350	1,603,593	5,317,069	4,237,761
Operating income	133,498	131,412	446,749	356,928
Interest and debt expense	1,047	965	3,275	2,974
Income before income taxes	132,451	130,447	443,474	353,954
Income taxes	32,233	31,772	105,862	85,745
Net income	$ 100,218	$ 98,675	$ 337,612	$ 268,209
Diluted earnings per share	$ 2.76	$ 2.58	$ 9.15	$ 7
Average diluted shares outstanding	36,334,000	38,218,000	36,886,000	38,342,000
Dividends per common share	$ 0.3	$ 0.25	$ 0.8	$ 0.67