Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
OPERATING ACTIVITIES
Net (loss) income	$ (18,586)	$ 20,383
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	92,642	96,806
Deferred income taxes	(15,733)	(13,440)
Stock-based compensation expense	682	393
Debt-related amortization	525	539
Loss (gain) on disposal of property and equipment	(1,034)	(14,809)
Changes in certain working capital items:
Trade receivables	(6,173)	25,348
Prepaid expenses and other current assets	(647)	6,193
Accounts payable, accrued liabilities, and accrued expenses	14,069	(19,086)
Accrued income taxes	5,221	(5,071)
Net cash provided by operating activities	70,966	97,256
INVESTING ACTIVITIES
Proceeds from sale of property and equipment	12,583	73,838
Purchases of property and equipment	(15,244)	(108,017)
Change in other assets	30	419
Net cash used in investing activities	(2,631)	(33,760)
FINANCING ACTIVITIES
Payments of cash dividends	(1,582)	(1,581)
Shares withheld for employee taxes related to stock-based compensation	(158)	(155)
Repayments of finance leases and debt	(63,358)	(64,773)
Repurchases of common stock	(7,281)	0
Net cash used in financing activities	(72,379)	(66,509)
Net decrease in cash, cash equivalents and restricted cash	(4,044)	(3,013)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Beginning of period	41,188	64,478
End of period	37,144	61,465
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for interest expense	10,654	11,605
Cash paid during the period for income taxes, net of refunds	5,860	25,740
Noncash investing and financing activities:
Purchased property and equipment in accounts payable	5,374	18,683
Sold revenue equipment and property in other current assets	0	494
Common stock dividends declared in accounts payable	1,569	1,580
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents	23,861	46,250
Restricted cash included in other current assets	317	741
Restricted cash included in other assets	12,966	14,474
Total cash, cash equivalents and restricted cash	$ 37,144	$ 61,465