Consolidated Condensed Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 75,323	$ 31,461
Receivables:
Trade, net	83,854	90,712
Other	12,639	11,055
Prepaid expenses and other	22,906	20,938
Total current assets	194,722	154,166
Property and equipment:
Revenue equipment, buildings and land, office equipment and other	920,608	904,237
Accumulated depreciation	(276,412)	(263,843)
Net property and equipment	644,196	640,394
Other noncurrent assets	1,916	2,026
Total assets	840,834	796,586
Current liabilities:
Accounts payable	26,176	22,917
Insurance and claims accruals	35,834	31,729
Accrued and other current liabilities	25,569	21,680
Total current liabilities	87,579	76,326
Deferred income taxes	123,285	122,022
Noncurrent operating lease liabilities	572	649
Total liabilities	211,436	198,997
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; 55,107,805 shares at June 30, 2020, and 54,703,466 shares at December 31, 2019, issued and outstanding	551	547
Additional paid-in capital	83,816	79,465
Retained earnings	545,031	517,577
Total stockholders’ equity	629,398	597,589
Total liabilities and stockholders’ equity	$ 840,834	$ 796,586