Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net revenues
Oil sales	$ 70,735		$ 117,416
Natural gas sales	12,133		20,374
NGL sales	8,196		14,371
Total net revenues	91,064		152,161
Operating expenses
Lease operating expenses	8,273		15,551
Severance and ad valorem taxes	4,723		7,910
Gathering, processing and transportation expenses	7,403		12,647
Depreciation, depletion and amortization	34,300		60,460
Abandonment expense and impairment of unproved properties	0		(29)
Exploration expense	2,470		2,470
General and administrative expenses	10,641		22,706
Total operating expenses	67,810		121,715
Total operating income (loss)	23,254		30,446
Other income (expense)
Gain (loss) on sale of oil and natural gas properties	7,191		7,357
Interest expense	(707)		(1,117)
Net gain (loss) on derivative instruments	2,529		6,288
Other income	0		0
Other income (expense)	9,013		12,528
Income (loss) before income taxes	32,267		42,974
Income tax (expense) benefit	(9,069)		(9,069)
Net income (loss)	23,198		33,905
Less: Net income attributable to noncontrolling interest	2,436		3,320
Net income (loss) attributable to common shareholders	$ 20,762		$ 30,585
Income per share:
Basic (USD per share)	$ 0.09		$ 0.14
Diluted (USD per share)	$ 0.09		$ 0.14
Predecessor
Net revenues
Oil sales		$ 20,361		$ 33,587
Natural gas sales		1,775		3,088
NGL sales		1,211		1,793
Total net revenues		23,347		38,468
Operating expenses
Lease operating expenses		2,597		6,639
Severance and ad valorem taxes		1,247		2,091
Gathering, processing and transportation expenses		1,459		2,589
Depreciation, depletion and amortization		21,182		42,485
Abandonment expense and impairment of unproved properties		897		897
Exploration expense		262		517
General and administrative expenses		2,607		4,888
Total operating expenses		30,251		60,106
Total operating income (loss)		(6,904)		(21,638)
Other income (expense)
Gain (loss) on sale of oil and natural gas properties		0		(4)
Interest expense		(1,798)		(3,439)
Net gain (loss) on derivative instruments		(7,843)		(5,925)
Other income		6		6
Other income (expense)		(9,635)		(9,362)
Income (loss) before income taxes		(16,539)		(31,000)
Income tax (expense) benefit		406		406
Net income (loss)		(16,133)		(30,594)
Less: Net income attributable to noncontrolling interest		0		0
Net income (loss) attributable to common shareholders		$ (16,133)		$ (30,594)