CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - 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
Operating revenues	$ 641,678	$ 333,294	$ 1,526,384	$ 992,063
(Loss) gain on derivative instruments	(201,282)	(42,253)	(301,641)	17,783
TOTAL OPERATING REVENUES	440,396	291,041	1,224,743	1,009,846
OPERATING EXPENSES
Direct operations	21,354	20,197	54,384	54,864
Transportation and gathering	148,794	146,982	418,984	425,563
Taxes other than income	8,207	3,615	17,195	10,705
Exploration	3,998	3,900	8,993	10,669
Depreciation, depletion and amortization	97,289	99,649	282,986	294,406
General and administrative	65,098	24,262	117,290	80,857
TOTAL OPERATING EXPENSES	344,740	298,605	899,832	877,064
Loss on equity method investments	0	0	0	(59)
Gain (loss) on sale of assets	184	31	275	(139)
INCOME (LOSS) FROM OPERATIONS	95,840	(7,533)	325,186	132,584
Interest expense, net	12,577	14,389	37,512	43,143
Other expense	47	57	139	171
Income (loss) before income taxes	83,216	(21,979)	287,535	89,270
Income tax expense (benefit)	20,502	(7,018)	68,003	19,947
NET INCOME (LOSS)	$ 62,714	$ (14,961)	$ 219,532	$ 69,323
Earnings (loss) per share
Basic (in dollars per share)	$ 0.16	$ (0.04)	$ 0.55	$ 0.17
Diluted (in dollars per share)	$ 0.16	$ (0.04)	$ 0.55	$ 0.17
Weighted-average common shares outstanding
Basic (in shares)	399,664	398,580	399,459	398,500
Diluted (in shares)	402,738	398,580	401,923	400,628
Natural gas
OPERATING REVENUES
Operating revenues	$ 641,625	$ 333,256	$ 1,526,202	$ 991,882
Other
OPERATING REVENUES
Operating revenues	$ 53	$ 38	$ 182	$ 181