Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
REVENUES
Revenues	$ 133,425	$ 141,497
OPERATING EXPENSES
Lease operating	12,043	7,525
Transportation, gathering and compression	$ 54,124	$ 41,168
Cost, Product and Service [Extensible List]	us-gaap:NaturalGasGatheringTransportationMarketingAndProcessingMember	us-gaap:NaturalGasGatheringTransportationMarketingAndProcessingMember
Production and ad valorem taxes	$ 4,868	$ 2,848
Brokered natural gas and marketing expense	9,258	9,459
Depreciation, depletion, amortization and accretion	44,135	29,897
Exploration	13,271	16,789
General and administrative	9,880	28,930
Loss on sale of assets	554	2
Other expense	16	24
Total operating expenses	148,149	136,642
OPERATING INCOME (LOSS)	(14,724)	4,855
OTHER INCOME (EXPENSE)
Gain (loss) on derivative instruments	40,131	(4,931)
Interest expense, net	(14,834)	(13,840)
Other income	12
Total other income (expense), net	25,309	(18,771)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	10,585	(13,916)
INCOME (LOSS) FROM CONTINUING OPERATIONS	10,585	(13,916)
Loss from discontinued operations, net of income tax	(7,757)	(182)
NET INCOME (LOSS)	$ 2,828	$ (14,098)
Basic:
Weighted average common stock outstanding	35,772	25,564
Income (loss) from continuing operations	$ 0.30	$ (0.54)
Loss from discontinued operations	(0.22)	(0.01)
Net income (loss)	$ 0.08	$ (0.55)
Diluted:
Weighted average common stock outstanding	35,858	25,564
Income (loss) from continuing operations	$ 0.30	$ (0.54)
Loss from discontinued operations	(0.22)	(0.01)
Net income (loss)	$ 0.08	$ (0.55)
Oil and Gas [Member]
REVENUES
Revenues	$ 123,871	$ 131,828
Brokered Natural Gas and Marketing Revenue [Member]
REVENUES
Revenues	9,488	9,530
Other Revenue [Member]
REVENUES
Revenues	$ 66	$ 139