Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 2,294	$ 68,665
Accounts receivable, net of allowance of $2,449 in 2023 and $2,934 in 2022	142,504	119,770
Drivers' advances and other receivables, net of allowance of $591 in 2023 and $585 in 2022	4,367	3,798
Inventory and supplies	4,848	3,516
Prepaid expenses	17,880	15,746
Assets held for sale	6,782	5,956
Income taxes receivable	6,739	4,838
Other short-term assets	531	367
Total current assets	185,945	222,656
Property and equipment, at cost	692,532	619,686
Less: accumulated depreciation and amortization	(177,877)	(211,951)
Net property and equipment	514,655	407,735
Goodwill	75,747	58,217
Other intangibles, net	99,615	48,169
Other assets	78,067	58,843
Noncurrent assets from discontinued operations	409	1,025
Total assets	954,438	796,645
Current liabilities:
Accounts payable	33,155	33,896
Accrued expenses	59,067	58,763
Current maturities of long-term debt	47,651	18,897
Current portion of finance lease obligations	781	5,326
Current portion of operating lease obligations	11,950	18,179
Current portion of insurance and claims accrual	17,687	21,060
Total current liabilities	170,291	156,121
Long-term debt	196,894	90,367
Long-term portion of finance lease obligations	5,296	432
Long-term portion of operating lease obligations	30,892	46,428
Insurance and claims accrual	15,746	15,859
Deferred income taxes	116,095	98,716
Other long-term liabilities	14,169	7,494
Other long-term liabilities of discontinued operations	1,635	4,100
Total liabilities	551,018	419,517
Commitments and contingencies
Stockholders' equity:
Additional paid-in-capital	155,846	152,886
Treasury stock at cost; 5,404,269 and 4,918,216 shares as of December 31, 2023 and December 31, 2022, respectively	(132,346)	(106,500)
Accumulated other comprehensive income	816	1,086
Retained earnings	378,919	329,471
Total stockholders' equity	403,420	377,128
Total liabilities and stockholders' equity	954,438	796,645
Common Class A [Member]
Stockholders' equity:
Common stock	161	161
Common Class B [Member]
Stockholders' equity:
Common stock	$ 24	$ 24