Statements of Condensed Consolidated Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating revenues:
Sales of natural gas, natural gas liquids and oil	$ 715,201	$ 1,271,613
Gain (loss) on derivatives not designated as hedges	389,436	(131,996)
Total operating revenues	1,107,057	1,143,173
Operating expenses:
Transportation and processing	439,834	439,246
Production	40,380	43,408
Exploration	923	1,007
Selling, general and administrative	34,938	48,978
Depreciation and depletion	357,526	391,113
Amortization of intangible assets	7,478	10,342
Loss on exchange of long-lived assets	48,852	0
Impairment and expiration of leases	53,768	29,534
Proxy, transaction and reorganization	0	4,089
Total operating expenses	983,699	967,717
Operating income	123,358	175,456
Gain on Equitrans Share Exchange	(187,223)	0
Loss (gain) on investment in Equitrans Midstream Corporation	390,628	(89,055)
Dividend and other income	(24,714)	(20,987)
Interest expense	62,374	56,573
Loss on debt extinguishment	16,610	0
(Loss) income before income taxes	(134,317)	228,925
Income tax expense	32,822	38,234
Net (loss) income	$ (167,139)	$ 190,691
Basic:
Weighted average common stock outstanding (in shares)	255,435	254,879
Net (loss) income (in dollars per share)	$ (0.65)	$ 0.75
Diluted:
Weighted average common stock outstanding (in shares)	255,435	255,226
Net (loss) income (in dollars per share)	$ (0.65)	$ 0.75
Sales of natural gas, natural gas liquids and oil
Operating revenues:
Sales of natural gas, natural gas liquids and oil	$ 715,201	$ 1,271,613
Gain (loss) on derivatives not designated as hedges
Operating revenues:
Net marketing services and other	$ 2,420	$ 3,556