Consolidated Condensed Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 36,136	$ 31,461
Receivables:
Trade, net	94,276	90,712
Other	10,077	11,055
Prepaid expenses and other	19,058	20,938
Total current assets	159,547	154,166
Property and equipment:
Revenue equipment, buildings and land, office equipment and other	937,389	904,237
Accumulated depreciation	(274,047)	(263,843)
Net property and equipment	663,342	640,394
Other noncurrent assets	2,029	2,026
Total assets	824,918	796,586
Current liabilities:
Accounts payable	34,821	22,917
Insurance and claims accruals	34,424	31,729
Accrued and other current liabilities	21,881	21,680
Total current liabilities	91,126	76,326
Deferred income taxes	123,790	122,022
Noncurrent operating lease liabilities	622	649
Total liabilities	215,538	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; 54,840,652 shares at March 31, 2020, and 54,703,466 shares at December 31, 2019, issued and outstanding	548	547
Additional paid-in capital	79,730	79,465
Retained earnings	529,102	517,577
Total stockholders’ equity	609,380	597,589
Total liabilities and stockholders’ equity	$ 824,918	$ 796,586