CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
OPERATING ACTIVITIES
Net income (loss)	$ 131,358	$ (5,122)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and other non-cash charges	61,352	53,754
Stock-based compensation expense	4,764	4,481
Gain on disposition of assets, net	(6,295)	(7,408)
Deferred income tax provision (benefit)	13,284	(4,385)
(Increase) decrease in assets:
Accounts receivable	(211,375)	(71,702)
Income taxes receivable	13,038	31,922
Inventories	(14,708)	3,044
Prepaid expenses	2,907	4,754
Other current assets	(83)	140
Other non-current assets	6,393	(982)
Increase (decrease) in liabilities:
Accounts payable	42,700	17,562
Income taxes payable	(139)	(426)
Accrued payroll and related expenses	10,759	(1,282)
Accrued insurance expenses	(5,702)	1,066
Accrued state, local and other taxes	4,309	1,815
Other accrued expenses	(2,804)	(2,575)
Pension and retirement plans liabilities	(6,044)	(1,526)
Long-term accrued insurance expenses	(3,762)	1,830
Other long-term liabilities	976	1,456
Net cash provided by operating activities	40,928	26,416
INVESTING ACTIVITIES
Capital expenditures	(90,227)	(44,925)
Proceeds from sale of assets	11,572	15,811
Net cash used for investing activities	(78,655)	(29,114)
FINANCING ACTIVITIES
Payment of dividends	(4,267)
Cash paid for common stock purchased and retired	(912)	(567)
Cash paid for finance lease	(3,642)	(396)
Net cash used for financing activities	(8,821)	(963)
Net decrease in cash and cash equivalents	(46,548)	(3,661)
Cash and cash equivalents at beginning of period	82,433	84,496
Cash and cash equivalents at end of period	35,885	80,835
Supplemental cash flows disclosure:
Income taxes payment (refund), net	18,615	(25,435)
Interest paid	127	124
Supplemental disclosure of noncash investing activities:
Capital expenditures included in accounts payable	$ 13,912	$ 6,077