Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 84,334	$ 355,549
Trade accounts receivable, net	1,726,155	1,506,619
Prepaid expenses and other	341,927	451,201
Total current assets	2,152,416	2,313,369
Property and equipment, at cost	7,680,238	6,680,316
Less accumulated depreciation	2,972,231	2,612,661
Net property and equipment	4,708,007	4,067,655
Goodwill and intangible assets, net	241,443	191,093
Other assets	329,693	222,231
Total assets	7,431,559	6,794,348
Current liabilities:
Current portion of long-term debt	0	355,972
Trade accounts payable	838,859	772,736
Claims accruals	340,207	307,210
Accrued payroll	208,707	190,950
Other accrued expenses	112,951	102,732
Total current liabilities	1,500,724	1,729,600
Long-term debt	1,243,814	945,257
Other long-term liabilities	346,007	256,233
Deferred income taxes	835,905	745,442
Stockholders' equity	3,505,109	3,117,816
Total liabilities and stockholders' equity	$ 7,431,559	$ 6,794,348