Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 68,665	$ 8,412
Accounts receivable, net of allowance of $2,934 in 2022 and $4,112 in 2021	119,770	142,362
Drivers' advances and other receivables, net of allowance of $585 in 2022 and $542 in 2021	3,798	8,792
Inventory and supplies	3,516	3,323
Prepaid expenses	15,746	12,536
Assets held for sale	5,956	2,925
Income taxes receivable	4,838	10,177
Other short-term assets	367	0
Total current assets	222,656	188,527
Property and equipment, at cost	619,686	518,406
Less: accumulated depreciation and amortization	(211,951)	(171,923)
Net property and equipment	407,735	346,483
Goodwill	58,217	42,518
Other intangibles, net	48,169	20,475
Other assets	58,843	52,384
Noncurrent assets from discontinued operations	1,025	1,275
Total assets	796,645	651,662
Current liabilities:
Accounts payable	33,896	29,907
Accrued expenses	50,984	38,001
Accrued purchased transportation	7,779	24,689
Current maturities of long-term debt	18,897	5,722
Current portion of finance lease obligations	5,326	6,848
Current portion of operating lease obligations	18,179	15,811
Current portion of insurance and claims accrual	21,060	21,210
Other short-term liabilities	0	557
Total current liabilities	156,121	142,745
Long-term debt	90,367	20,347
Long-term portion of finance lease obligations	432	3,969
Long-term portion of operating lease obligations	46,428	21,554
Insurance and claims accrual	15,859	21,438
Deferred income taxes	98,716	84,661
Other long-term liabilities	7,494	2,149
Other long-term liabilities of discontinued operations	4,100	5,100
Total liabilities	419,517	301,963
Commitments and contingencies	0	0
Stockholders' equity:
Additional paid-in-capital	152,886	149,406
Treasury stock at cost; 4,918,216 and 1,711,627 shares as of December 31, 2022 and December 31, 2021, respectively	(106,500)	(23,662)
Accumulated other comprehensive loss	1,086	(1,306)
Retained earnings	329,471	225,076
Total stockholders' equity	377,128	349,699
Total liabilities and stockholders' equity	796,645	651,662
Common Class A [Member]
Stockholders' equity:
Common stock	161	161
Common Class B [Member]
Stockholders' equity:
Common stock	$ 24	$ 24