CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income (loss)	$ 218,363	$ 7,217	$ (212,192)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and other non-cash charges	83,664	72,506	95,309
Stock-based compensation expense	6,375	6,576	8,735
Gain on disposition of assets, net	(8,804)	(10,882)	(9,523)
Gain due to benefit plan financing arrangement			(891)
Deferred income tax provision (benefit)	19,496	4,888	(25,845)
Pension settlement, impairment and other non-cash charges	2,921		211,043
(Increase) decrease in assets:
Accounts receivable	(157,894)	(91,082)	80,769
Income taxes receivable	16,101	24,439	(58,798)
Inventories	(18,413)	3,951	18,076
Prepaid expenses	(7,980)	(650)	1,337
Other current assets	406	90	227
Other non-current assets	9,306	(1,170)	(3,819)
Increase (decrease) in liabilities:
Accounts payable	35,759	32,900	(9,130)
Income taxes payable	(157)	(459)	(419)
Accrued payroll and related expenses	17,864	(3,080)	(1,219)
Accrued insurance expenses	(6,897)	4,640	(2,051)
Accrued state, local and other taxes	2,391	(883)	361
Other accrued expenses	(3,703)	(4,061)	(6,541)
Pension and retirement plans liabilities	(4,589)	(1,065)	(3,249)
Long-term accrued insurance expenses	(4,621)	(52)	(2,218)
Other long-term liabilities	1,698	3,896	(2,004)
Net cash provided by operating activities	201,286	47,719	77,958
INVESTING ACTIVITIES
Capital expenditures	(139,552)	(67,645)	(65,065)
Proceeds from sale of assets	15,837	20,014	22,406
Proceeds from benefit plan financing arrangement			1,566
Re-investment in benefit plan financing arrangement			(1,566)
Net cash used for investing activities	(123,715)	(47,631)	(42,659)
FINANCING ACTIVITIES
Payment of dividends	(8,645)
Cash paid for common stock purchased and retired	(918)	(567)	(826)
Cash paid for finance lease	(24,017)	(1,584)
Net cash used for financing activities	(33,580)	(2,151)	(826)
Net increase (decrease) in cash and cash equivalents	43,991	(2,063)	34,473
Cash and cash equivalents at beginning of period	82,433	84,496	50,023
Cash and cash equivalents at end of period	126,424	82,433	84,496
Supplemental cash flows disclosure:
Income taxes payment (refund), net	35,809	(20,903)	(10,051)
Interest paid	170	166	160
Supplemental disclosure of noncash investing activities:
Capital expenditures included in accounts payable	$ 9,334	$ 4,282	$ 3,859