Statements of Condensed Consolidated 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
Operating revenues:
Sales of natural gas, natural gas liquids and oil	$ 498,772	$ 900,527	$ 1,213,973	$ 2,172,140
Gain on derivatives not designated as hedges	26,426	407,635	415,862	275,639
Net marketing services and other	1,876	2,090	4,296	5,646
Total operating revenues	527,074	1,310,252	1,634,131	2,453,425
Operating expenses:
Transportation and processing	405,636	436,984	845,470	876,230
Production	38,329	36,316	78,709	79,724
Exploration	876	1,857	1,799	2,864
Selling, general and administrative	43,341	86,208	78,279	135,186
Depreciation and depletion	323,096	372,413	680,622	763,526
Amortization of intangible assets	7,477	10,342	14,955	20,684
Loss on sale/exchange of long-lived assets	49,207	0	98,059	0
Impairment and expiration of leases	41,279	48,584	95,047	78,118
Transaction, proxy and reorganization	4,745	21,518	4,745	25,607
Total operating expenses	913,986	1,014,222	1,897,685	1,981,939
Operating (loss) income	(386,912)	296,030	(263,554)	471,486
Gain on Equitrans Share Exchange	0	0	(187,223)	0
(Gain) loss on investment in Equitrans Midstream Corporation	(82,983)	104,741	307,645	15,686
Dividend and other income	(3,590)	(23,645)	(28,304)	(44,632)
Loss on debt extinguishment	353	0	16,963	0
Interest expense	65,386	50,503	127,760	107,076
(Loss) income before income taxes	(366,078)	164,431	(500,395)	393,356
Income tax (benefit) expense	(103,003)	38,865	(70,181)	77,099
Net (loss) income	$ (263,075)	$ 125,566	$ (430,214)	$ 316,257
Basic:
Weighted average common stock outstanding (in shares)	255,524	255,099	255,477	254,975
Net (loss) income (in dollars per share)	$ (1.03)	$ 0.49	$ (1.68)	$ 1.24
Diluted:
Weighted average common stock outstanding (in shares)	255,524	255,223	255,477	255,211
Net (loss) income (in dollars per share)	$ (1.03)	$ 0.49	$ (1.68)	$ 1.24
Sales of natural gas, natural gas liquids and oil
Operating revenues:
Sales of natural gas, natural gas liquids and oil	$ 498,772	$ 900,527	$ 1,213,973	$ 2,172,140
Gain on derivatives not designated as hedges
Operating revenues:
Gain on derivatives not designated as hedges	$ 26,426	$ 407,635	$ 415,862	$ 275,639