Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES
Revenues	$ 634,441	$ 515,145	$ 383,659
OPERATING EXPENSES
Lease operating	43,359	28,289	20,525
Transportation, gathering and compression	$ 208,826	$ 138,766	$ 124,839
Cost, Product and Service [Extensible List]	us-gaap:NaturalGasGatheringTransportationMarketingAndProcessingMember	us-gaap:NaturalGasGatheringTransportationMarketingAndProcessingMember	us-gaap:NaturalGasGatheringTransportationMarketingAndProcessingMember
Production and ad valorem taxes	$ 12,141	$ 10,141	$ 8,490
Brokered natural gas and marketing expense	42,700	16,886	3,191
Depreciation, depletion, amortization and accretion	156,003	134,940	119,362
Exploration	58,917	49,563	50,208
General and administrative	70,941	44,389	44,553
Rig termination and standby	1,081		1
Gain on sale of assets	(476)	(1,815)	(179)
Other expense	60
Total operating expenses	593,552	421,159	370,990
OPERATING INCOME	40,889	93,986	12,669
OTHER INCOME (EXPENSE)
Gain (loss) on derivative instruments	48,596	(21,169)	45,365
Interest expense, net	(59,055)	(53,990)	(49,490)
Other income (expense)	16	(1)	(19)
Total other expense, net	(10,443)	(75,160)	(4,144)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	30,446	18,826	8,525
INCOME FROM CONTINUING OPERATIONS	30,446	18,826	8,525
Income from discontinued operations, net of income tax	1,316
NET INCOME	$ 31,762	$ 18,826	$ 8,525
Basic:
Weighted average common stock outstanding	33,211	19,999	17,479
Income from continuing operations	$ 0.92	$ 0.94	$ 0.49
Income from discontinued operations	0.04
Net income	$ 0.96	$ 0.94	$ 0.49
Diluted:
Weighted average common stock outstanding	33,324	20,087	17,679
Income from continuing operations	$ 0.91	$ 0.94	$ 0.48
Income from discontinued operations	0.04
Net income	$ 0.95	$ 0.94	$ 0.48
Oil and Gas [Member]
REVENUES
Revenues	$ 591,699	$ 498,593	$ 380,178
Brokered Natural Gas and Marketing Revenue [Member]
REVENUES
Revenues	42,274	$ 16,552	$ 3,481
Other Revenue [Member]
REVENUES
Revenues	$ 468