CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Operating activities:
Net income			$ 16,310	$ 7,790
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	$ 8,986	$ 9,163	17,010	18,733
Bad debt benefit			(191)	(102)
Deferred income tax benefit, net			135	(1,979)
Stock-based compensation			1,759	745
Gain on disposal of assets, net	(881)	(140)	(7,282)	(317)
Other			214	71
Changes in operating assets and liabilities:
Accounts and other receivables			(16,180)	(18,174)
Inventories and prepaid expenses			3,383	1,852
Accounts payable and accrued expenses			8,601	6,213
Insurance and claims accruals			2,359	357
Other long-term assets and liabilities			(2,245)	503
Net cash provided by operating activities			23,873	15,692
Investing activities:
Capital expenditures			(9,011)	(1,066)
Proceeds from sale of property and equipment			12,843	6,141
Net cash provided by investing activities			3,832	5,075
Financing activities:
Borrowings under long-term debt			6,000	28,760
Payments on long-term debt			(52,201)	(39,156)
Principal payments on financing lease obligations			(12,290)	(5,888)
Proceeds from obligation under finance lease			41,974
Payment of debt issuance costs			(774)
Net change in bank drafts payable			41	(2,785)
Proceeds from capital sale leaseback					$ 24,500
Net payments for tax withholdings for vested stock-based awards			(1,108)	(9)
Net cash used in financing activities			(18,358)	(19,078)
Increase in cash and restricted cash			9,347	1,689
Cash and restricted cash:
Beginning of period			1,352	325	325
End of period	$ 10,699	$ 2,014	10,699	2,014	$ 1,352
Supplemental disclosure of cash flow information:
Interest			2,710	2,106
Income taxes, net of refunds			7,516	6,623
Supplemental disclosure of non-cash investing:
Purchase of revenue equipment included in accounts payable			$ 6,059	$ 1,021