CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues	$ 2,056,285	$ 1,310,368	$ 5,512,910	$ 3,416,573
Operating expenses
Cost of revenues (excluding depreciation)	1,642,626	1,098,422	4,801,800	3,184,583
Operating expense (excluding depreciation)	88,329	78,059	252,075	221,068
Depreciation and amortization	25,125	23,618	74,488	70,046
Loss (gain) on sale of assets, net	(185)	2	(170)	(64,400)
General and administrative expense (excluding depreciation)	16,219	12,473	47,550	36,559
Acquisition and integration costs	0	1	63	87
Total operating expenses	1,772,114	1,212,575	5,175,806	3,447,943
Operating income (loss)	284,171	97,793	337,104	(31,370)
Other income (expense)
Interest expense and financing costs, net	(16,852)	(15,374)	(51,400)	(50,711)
Debt extinguishment and commitment costs	343	(9)	(5,329)	(8,144)
Gain on curtailment of pension obligation	0	0	0	2,032
Other income (loss), net	(198)	(22)	(149)	3
Total other expense, net	(16,707)	(15,405)	(56,878)	(56,820)
Income (loss) before income taxes	267,464	82,388	280,226	(88,190)
Income tax expense	(68)	(586)	(756)	(1,193)
Net income (loss)	$ 267,396	$ 81,802	$ 279,470	$ (89,383)
Income (loss) per share
Basic (in dollars per share)	$ 4.49	$ 1.38	$ 4.70	$ (1.55)
Diluted (in dollars per share)	$ 4.47	$ 1.37	$ 4.68	$ (1.55)
Weighted-average number of shares outstanding
Basic (in shares)	59,535	59,437	59,481	57,713
Diluted (in shares)	59,831	59,761	59,710	57,713