Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues and other income	$ 117,875	$ 343,365	$ 360,076	$ 648,817
Expenses
Taxes other than income	10,372	25,517	30,058	49,302
General and administrative expenses	23,776	17,506	33,509	36,431
Interest, net of amounts capitalized of $8,729, $8,238, $18,181 and $18,772, respectively	20,617	20,416	40,563	37,814
Depletion, depreciation, and amortization	55,414	58,264	152,276	115,561
Commodity derivatives expense (income)	40,130	(24,760)	(106,641)	58,617
Gain on debt extinguishment	0	(100,346)	(18,994)	(100,346)
Write-down of oil and natural gas properties	662,440	0	734,981	0
Other expenses	11,290	2,386	13,784	6,524
Total expenses	917,055	131,296	1,095,856	473,181
Income (loss) before income taxes	(799,180)	212,069	(735,780)	175,636
Income tax provision (benefit)	(101,706)	65,377	(112,322)	54,618
Net income (loss)	$ (697,474)	$ 146,692	$ (623,458)	$ 121,018
Net income (loss) per common share
Basic	$ (1.41)	$ 0.32	$ (1.26)	$ 0.27
Diluted	$ (1.41)	$ 0.32	$ (1.26)	$ 0.26
Weighted average common shares outstanding
Basic	495,245	452,612	494,752	452,169
Diluted	495,245	467,427	494,752	461,460
Other income
Revenues and other income	$ 494	$ 2,367	$ 1,322	$ 4,457
Transportation and marketing
Operating expenses	9,388	11,236	19,009	22,009
Oil, natural gas, and related product sales
Revenues and other income	109,387	330,421	339,011	624,998
Operating expenses	81,293	117,932	190,563	243,355
CO2
Revenues and other income	6,504	7,986	14,532	16,556
Operating expenses	885	581	1,637	1,137
Purchased oil sales
Revenues and other income	1,490	2,591	5,211	2,806
Operating expenses	$ 1,450	$ 2,564	$ 5,111	$ 2,777