CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues and other:
Total revenues and other	$ 267,908	$ 187,764
Operating expenses:
Depreciation, depletion and amortization	101,657	93,543
Write-down of oil and natural gas properties		57
Accretion expense	14,985	12,417
General and administrative expense	19,189	27,469
Total operating expenses	203,281	191,976
Operating income (expense)	64,627	(4,212)
Interest expense	(34,076)	(25,850)
Price risk management activities income (expense)	(137,508)	243,217
Other expense	(13,950)	(146)
Net income (loss) before income taxes	(120,907)	213,009
Income tax expense	(584)	(55,260)
Net income (loss)	$ (121,491)	$ 157,749
Net income (loss) per common share:
Basic	$ (1.49)	$ 2.71
Diluted	$ (1.49)	$ 2.69
Weighted average common shares outstanding:
Basic	81,435	58,240
Diluted	81,435	58,572
Oil and Gas Properties
Operating expenses:
Lease operating expense	$ 66,628	$ 58,241
Production taxes	822	249
Oil
Revenues and other:
Total revenues and other	229,561	166,624
Natural Gas
Revenues and other:
Total revenues and other	28,234	11,898
NGL
Revenues and other:
Total revenues and other	9,113	4,301
Other
Revenues and other:
Total revenues and other	$ 1,000	$ 4,941