CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OPERATING REVENUES
Operating revenues	$ 472,918	$ 370,395
(Loss) gain on derivative instruments	(13,238)	16,062
TOTAL OPERATING REVENUES	459,680	386,457
OPERATING EXPENSES
Direct operations	16,876	17,244
Transportation and gathering	136,702	143,332
Taxes other than income	4,805	3,738
Exploration	2,627	2,190
Depreciation, depletion and amortization	94,148	100,135
General and administrative	29,155	33,429
TOTAL OPERATING EXPENSES	284,313	300,068
Loss on equity method investments	0	(59)
Gain on sale of assets	71	71
INCOME FROM OPERATIONS	175,438	86,401
Interest expense, net	12,377	14,211
Other expense	46	66
Income before income taxes	163,015	72,124
Income tax expense	36,661	18,214
NET INCOME	$ 126,354	$ 53,910
Earnings per share
Basic (in dollars per share)	$ 0.32	$ 0.14
Diluted (in dollars per share)	$ 0.31	$ 0.13
Weighted-average common shares outstanding
Basic (in shares)	399,121	398,343
Diluted (in shares)	401,811	399,897
Natural gas
OPERATING REVENUES
Operating revenues	$ 472,859	$ 370,340
Other
OPERATING REVENUES
Operating revenues	$ 59	$ 55