QUARTERLY DATA (UNAUDITED) (Schedule of Quarterly Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended							5 Months Ended	7 Months Ended		12 Months Ended
	Jun. 30, 2018	May 31, 2018	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	May 31, 2018	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial Designation, Predecessor and Successor [Fixed List]										Predecessor		Successor	Successor	Successor	Predecessor	Predecessor
Total revenues	$ 21,720	$ 43,089	$ 16,138	$ 23,249	$ 30,587	$ 43,846	$ 47,914	$ 68,966	$ 67,942	$ 111,031		$ 138,600	$ 113,820		$ 225,693
Gross profit	11,246	23,201	2,518	1,746	7,068	18,054	18,427	37,319	36,558
Net income (loss)	$ (538)	$ (595,076)	$ (22,104)	$ (19,529)	$ (60,907)	$ (35,775)	$ 34,267	$ (9,760)	$ (15,449)	$ (610,525)	$ 23,969	$ 23,969	$ (138,315)		$ (134,201)
Net income (loss) per share/unit:
Basic, unit		$ (11.81)							$ (0.31)
Diluted, unit		$ (11.81)							$ (0.31)
Basic, share/unit	$ (0.05)		$ (2.17)	$ (1.93)	$ (6.05)	$ (3.56)	$ 3.41	$ (0.97)		$ (12.12)		$ 2.39	$ (13.69)		$ (2.66)
Diluted, share/unit	$ (0.05)		$ (2.17)	$ (1.93)	$ (6.05)	$ (3.56)	$ 3.41	$ (0.97)		$ (12.12)		$ 2.39	$ (13.69)		$ (2.66)
Revenue excluding royalty							$ 52,900					$ 143,600
Reorganization items, net										$ 587,325		2,323
Impairment of oil and gas properties					$ 129,100					$ 3		3,065	$ 129,082		$ 93,607
Barnett Shale [Member]
Net income (loss) per share/unit:
Impairment of oil and gas properties													78,100
San Juan Property [Member]
Net income (loss) per share/unit:
Impairment of oil and gas properties													25,400
Permian Basin Property [Member]
Net income (loss) per share/unit:
Impairment of oil and gas properties													8,000
Mid Continent Area Oil and Gas Properties [Member]
Net income (loss) per share/unit:
Impairment of oil and gas properties													6,700
Monroe Field Property [Member]
Net income (loss) per share/unit:
Impairment of oil and gas properties													2,100
Michigan Oil And Natural Gas Properties [Member]
Net income (loss) per share/unit:
Impairment of oil and gas properties													$ 8,800
Royalty [Member]
Total revenues							$ 5,000					$ 5,000