Consolidated Condensed Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating revenue	$ 237,366	$ 279,538	$ 733,276	$ 863,233
Operating expenses (income):
Salaries, wages and benefits	83,442	92,620	258,723	287,468
Purchased transportation	44,862	49,673	129,911	152,075
Fuel and fuel taxes	35,781	48,695	114,151	137,706
Supplies and maintenance	16,464	17,896	49,006	51,291
Depreciation	27,392	29,017	84,125	87,974
Operating taxes and licenses	2,505	2,821	7,619	8,345
Insurance and claims	13,759	13,254	37,975	40,805
Communications and utilities	2,166	2,584	6,834	7,625
Gain on disposition of revenue equipment	(881)	(3,014)	(4,584)	(11,810)
Other	7,607	8,762	23,023	27,301
Total operating expenses	233,097	262,308	706,783	788,780
Operating income	4,269	17,230	26,493	74,453
Other	(922)	(1,017)	(2,732)	(2,938)
Income before income taxes	5,191	18,247	29,225	77,391
Income taxes expense	1,437	4,649	7,936	19,417
Net income	$ 3,754	$ 13,598	$ 21,289	$ 57,974
Basic earnings per common share (in dollars per share)	$ 0.05	$ 0.17	$ 0.26	$ 0.71
Diluted earnings per common share (in dollars per share)	0.05	0.17	0.26	0.71
Dividends declared per common share (in dollars per share)	$ 0.06	$ 0.06	$ 0.18	$ 0.18