CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
OPERATING REVENUES
Operating revenues	$ 370,395	$ 633,424
Gain on derivative instruments	16,062	8,257
TOTAL OPERATING REVENUES	386,457	641,681
OPERATING EXPENSES
Direct operations	17,244	18,334
Transportation and gathering	143,332	137,333
Taxes other than income	3,738	5,847
Exploration	2,190	6,044
Depreciation, depletion and amortization	100,135	92,258
General and administrative	33,429	31,090
TOTAL OPERATING EXPENSES	300,068	290,906
Earnings (loss) on equity method investments	(59)	3,684
Gain (loss) on sale of assets	71	(1,500)
INCOME FROM OPERATIONS	86,401	352,959
Interest expense, net	14,211	12,181
Other expense	66	144
Income before income taxes	72,124	340,634
Income tax expense	18,214	77,871
NET INCOME	$ 53,910	$ 262,763
Earnings per share
Basic (in dollars per share)	$ 0.14	$ 0.62
Diluted (in dollars per share)	$ 0.13	$ 0.62
Weighted-average common shares outstanding
Basic (in shares)	398,343	423,116
Diluted (in shares)	399,897	425,189
Natural gas
OPERATING REVENUES
Operating revenues	$ 370,340	$ 633,174
Other
OPERATING REVENUES
Operating revenues	$ 55	$ 250