Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 64,185	$ 53,344
Trade accounts receivable, net	1,272,115	1,334,912
Prepaid expenses and other	613,260	696,656
Total current assets	1,949,560	2,084,912
Property and equipment, at cost	8,866,281	8,767,872
Less accumulated depreciation	3,071,485	2,993,959
Net property and equipment	5,794,796	5,773,913
Goodwill and intangible assets, net	262,173	267,953
Other assets	421,254	411,482
Total assets	8,427,783	8,538,260
Current liabilities:
Current portion of long-term debt	0	249,961
Trade accounts payable	731,741	737,364
Claims accruals	576,082	547,277
Accrued payroll	93,579	94,563
Other accrued expenses	142,582	150,256
Total current liabilities	1,543,984	1,779,421
Long-term debt	1,366,506	1,326,107
Other long-term liabilities	397,866	392,766
Deferred income taxes	952,996	936,208
Shareholders' equity	4,166,431	4,103,758
Total liabilities and shareholders' equity	$ 8,427,783	$ 8,538,260