CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (in thousands, except per share data) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating revenues and other income:
Oil, gas, and NGL production revenue	$ 759,813	$ 282,012	$ 1,745,547	$ 806,035
Other operating income (loss)	426	(997)	22,387	346
Total operating revenues and other income	760,239	281,015	1,767,934	806,381
Operating expenses:
Oil, gas, and NGL production expense	135,745	95,257	362,131	295,254
Depletion, depreciation, amortization, and asset retirement obligation liability accretion	202,701	181,708	574,375	596,053
Exploration	8,709	8,547	26,746	29,683
Impairment	8,750	8,750	26,250	1,007,263
General and administrative	25,530	24,452	74,883	79,126
Net derivative (gain) loss	209,146	63,871	924,183	(314,269)
Other operating expense, net	43,401	1,562	44,654	10,174
Total operating expenses	633,982	384,147	2,033,222	1,703,284
Income (loss) from operations	126,257	(103,132)	(265,288)	(896,903)
Interest expense	(40,861)	(41,519)	(120,268)	(123,385)
Gain (loss) on extinguishment of debt	5	25,070	(2,139)	264,546
Other non-operating income (expense), net	153	(1,680)	(1,071)	(2,359)
Income (loss) before income taxes	85,554	(121,261)	(388,766)	(758,101)
Income tax benefit	39	22,969	95	158,662
Net income (loss)	$ 85,593	$ (98,292)	$ (388,671)	$ (599,439)
Basic weighted-average common shares outstanding	121,457	114,371	118,224	113,462
Diluted weighted-average common shares outstanding	123,851	114,371	118,224	113,462
Basic net income (loss) per common share	$ 0.70	$ (0.86)	$ (3.29)	$ (5.28)
Diluted net income (loss) per common share	0.69	(0.86)	(3.29)	(5.28)
Dividends per common share	$ 0.01	$ 0.01	$ 0.02	$ 0.02