CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Revenues:
Total operating revenues	$ 101,980	$ 80,810
Operating Expenses:
Production tax expense	3,893	5,175
Exploration expense	25	13
Impairment, dry hole costs and abandonment expense	322	317
(Gain) loss on sale of properties	(5)	408
Depreciation, depletion and amortization	72,610	40,985
Unused commitments	4,469	4,538
General and administrative expense	12,660	10,107
Merger transaction expense	2,414	4,763
Other operating expenses, net	(24)	39
Total operating expenses	109,364	73,015
Operating Income (Loss)	(7,384)	7,795
Other Income and Expense:
Interest and other income	314	691
Interest expense	(13,679)	(13,090)
Commodity derivative gain (loss)	(105,191)	(20,333)
Total other income and expense	(118,556)	(32,732)
Income (Loss) before Income Taxes	(125,940)	(24,937)
(Provision for) Benefit from Income Taxes	29,711	0
Net Income (Loss)	$ (96,229)	$ (24,937)
Net Income (Loss) Per Common Share, Basic (in dollars per share)	$ (0.46)	$ (0.20)
Net Income (Loss) Per Common Share, Diluted (in dollars per share)	$ (0.46)	$ (0.20)
Weighted Average Common Shares Outstanding, Basic	209,931,744	123,595,553
Weighted Average Common Shares Outstanding, Diluted	209,931,744	123,595,553
Oil, gas and NGL production
Operating Revenues:
Production and other revenues	$ 101,705	$ 80,831
Other operating revenues, net
Operating Revenues:
Production and other revenues	275	(21)
Lease operating expense
Operating Expenses:
Cost of goods and services	11,277	6,251
Gathering, transportation and processing expense
Operating Expenses:
Cost of goods and services	$ 1,723	$ 419