Consolidated Condensed Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 96,288	$ 80,600
Receivables:
Trade, net	115,430	120,702
Other	7,988	7,218
Prepaid expenses and other	24,206	27,320
Total current assets	243,912	235,840
Property and equipment:
Revenue equipment, buildings and land, office equipment and other	1,082,361	1,074,832
Accumulated depreciation	(348,641)	(346,665)
Net property and equipment	733,720	728,167
Other noncurrent assets	1,641	1,672
Total assets	979,273	965,679
Current liabilities:
Accounts payable	41,558	37,299
Insurance and claims accruals	48,967	45,747
Accrued and other current liabilities	29,077	41,264
Total current liabilities	119,602	124,310
Deferred income taxes	137,825	137,041
Noncurrent operating lease liabilities	335	409
Total liabilities	257,762	261,760
Stockholders’ equity:
Preferred stock, $.01 par value per share; 2,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $.01 par value per share; 192,000,000 shares authorized; 81,233,741 shares at March 31, 2023, and 81,115,132 shares at December 31, 2022, issued and outstanding	812	811
Additional paid-in capital	47,151	47,188
Retained earnings	673,548	655,920
Total stockholders’ equity	721,511	703,919
Total liabilities and stockholders’ equity	$ 979,273	$ 965,679