CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (in thousands, except per share data) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating revenues and other income:
Oil, gas, and NGL production revenue	$ 354,233	$ 340,476
Net gain on divestiture activity	0	61
Other operating revenues	1,501	393
Total operating revenues and other income	355,734	340,930
Operating expenses:
Oil, gas, and NGL production expense	119,552	121,305
Depletion, depreciation, amortization, and asset retirement obligation liability accretion	233,489	177,746
Exploration	11,349	11,348
Impairment	989,763	6,338
General and administrative	27,447	32,086
Net derivative (gain) loss	(545,340)	177,081
Other operating expenses, net	566	335
Total operating expenses	836,826	526,239
Loss from operations	(481,092)	(185,309)
Interest expense	(41,512)	(37,980)
Gain on extinguishment of debt	12,195	0
Other non-operating expense, net	(494)	(317)
Loss before income taxes	(510,903)	(223,606)
Income tax benefit	99,008	46,038
Net loss	$ (411,895)	$ (177,568)
Basic weighted-average common shares outstanding	113,009	112,252
Diluted weighted-average common shares outstanding	113,009	112,252
Basic net loss per common share	$ (3.64)	$ (1.58)
Diluted net loss per common share	(3.64)	(1.58)
Dividends per common share	$ 0.01	$ 0.05