Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
OPERATING ACTIVITIES
Net (loss) income	$ (15,108)	$ 12,612
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,504	48,469
Deferred income taxes	(9,178)	(8,659)
Stock-based compensation expense	283	152
Debt-related amortization	263	269
Loss (gain) on disposal of property and equipment	89	(6,786)
Changes in certain working capital items:
Trade receivables	(5,192)	13,649
Prepaid expenses and other current assets	2,586	4,864
Accounts payable, accrued liabilities, and accrued expenses	5,732	(10,978)
Accrued income taxes	4,997	12,850
Net cash provided by operating activities	30,976	66,442
INVESTING ACTIVITIES
Proceeds from sale of property and equipment	6,649	28,859
Purchases of property and equipment	(4,697)	(42,149)
Change in other assets	0	489
Net cash provided by (used in) investing activities	1,952	(12,801)
FINANCING ACTIVITIES
Shares withheld for employee taxes related to stock-based compensation	(63)	(41)
Repayments of finance leases and debt	(36,660)	(47,325)
Net cash used in financing activities	(36,723)	(47,366)
Net (decrease) increase in cash, cash equivalents and restricted cash	(3,795)	6,275
CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Beginning of period	41,188	64,478
End of period	37,393	70,753
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for interest expense	5,289	6,121
Cash paid during the period for income taxes, net of refunds	(77)	232
Noncash investing and financing activities:
Purchased property and equipment in accounts payable	4,812	2,059
Sold revenue equipment and property in other current assets	0	232
Common stock dividends declared in accounts payable	1,582	1,581
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents	23,823	55,506
Restricted cash included in other current assets	323	746
Restricted cash included in other assets	13,247	14,501
Total cash, cash equivalents and restricted cash	$ 37,393	$ 70,753