CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (in thousands, except per share data) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenues and other income:
Oil, gas, and NGL production revenue	$ 423,165	$ 354,233
Other operating income	20,681	1,501
Total operating revenues and other income	443,846	355,734
Operating expenses:
Oil, gas, and NGL production expense	100,930	119,552
Depletion, depreciation, amortization, and asset retirement obligation liability accretion	166,960	233,489
Exploration	9,323	11,349
Impairment	8,750	989,763
General and administrative	24,714	27,447
Net derivative (gain) loss	344,689	(545,340)
Other operating expense, net	(599)	566
Total operating expenses	654,767	836,826
Loss from operations	(210,921)	(481,092)
Interest expense	(39,871)	(41,512)
Gain (Loss) on Extinguishment of Debt	0	12,195
Other non-operating expense, net	(371)	(494)
Loss before income taxes	(251,163)	(510,903)
Income tax (expense) benefit	(106)	99,008
Net loss	$ (251,269)	$ (411,895)
Basic weighted-average common shares outstanding	114,759	113,009
Diluted weighted-average common shares outstanding	114,759	113,009
Basic net loss per common share	$ (2.19)	$ (3.64)
Diluted net loss per common share	(2.19)	(3.64)
Dividends per common share	$ 0.01	$ 0.01