CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Revenues:
Total operating revenues	$ 79,566	$ 101,980
Operating Expenses:
Production tax expense	(2,508)	3,893
Exploration expense	31	25
Impairment and abandonment expense	1,265,426	322
(Gain) loss on sale of properties	0	(5)
Depreciation, depletion and amortization	74,925	72,610
Unused commitments	4,458	4,469
General and administrative expense	10,215	12,660
Merger transaction expense	0	2,414
Other operating expenses, net	55	(24)
Total operating expenses	1,368,095	109,364
Operating Income (Loss)	(1,288,529)	(7,384)
Other Income and Expense:
Interest and other income (expense)	(195)	314
Interest expense	(14,383)	(13,679)
Commodity derivative gain (loss)	192,188	(105,191)
Total other income and expense	177,610	(118,556)
Income (Loss) before Income Taxes	(1,110,919)	(125,940)
(Provision for) Benefit from Income Taxes	95,280	29,711
Net Income (Loss)	$ (1,015,639)	$ (96,229)
Net Income (Loss) Per Common Share, Basic (in dollars per share)	$ (4.81)	$ (0.46)
Net Income (Loss) Per Common Share, Diluted (in dollars per share)	$ (4.81)	$ (0.46)
Weighted Average Common Shares Outstanding, Basic (in shares)	211,111,830	209,931,744
Weighted Average Common Shares Outstanding, Diluted (in shares)	211,111,830	209,931,744
Oil, gas and NGL production
Operating Revenues:
Production and other revenues	$ 79,566	$ 101,705
Other operating revenues, net
Operating Revenues:
Production and other revenues	0	275
Lease operating expense
Operating Expenses:
Cost of goods and services	11,081	11,277
Gathering, transportation and processing expense
Operating Expenses:
Cost of goods and services	$ 4,412	$ 1,723