CHAPTER 11 PROCEEDINGS (Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Feb. 08, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 95,367	$ 26,854
Restricted cash	681	1,001
Total accounts receivable, net	61,187	87,842
Other receivables	1,344	6,331
Related party receivables	0	3,341
Prepaid expenses and other current assets	8,047	1,125
Total current assets	166,626	142,917
Property and equipment, net
Oil and gas properties, successful efforts method	215,352	763,337
Other property and equipment	107,028	444,269
Total property and equipment, net	322,380	1,207,606
Other assets
Operating lease right-of-use assets, net	0
Deferred financing costs, net	1,581	3,195
Deposits and other long-term assets	7,993	65
Total other assets	9,574	7,307
Total assets	498,580	1,357,830
Current liabilities
Accounts payable and accrued liabilities	64,137	247,439
Advances from non-operators	811	5,193
Advances from related party	3,175	9,839
Asset retirement obligations, current portion	34	2,079	$ 33
Total current liabilities not subject to compromise	292,245	956,383
Long-term liabilities
Long-term portion	13,149	9,473	10,476
Total long-term liabilities not subject to compromise	16,698	185,320
Liabilities subject to compromise	896,862	0
Total liabilities	1,205,805	1,141,703
Noncontrolling interest	(236,628)	245,520	$ 183,065	$ 154,445
Total liabilities and stockholders’ equity	498,580	$ 1,357,830
Debtor-In-Possession
Current assets
Cash and cash equivalents	81,669
Restricted cash	681
Total accounts receivable, net	49,256
Other receivables	1,311
Related party receivables	17,586
Prepaid expenses and other current assets	6,340
Total current assets	156,843
Property and equipment, net
Oil and gas properties, successful efforts method	215,352
Other property and equipment	23,210
Total property and equipment, net	238,562
Other assets
Investment in subsidiary	1,505,533
Operating lease right-of-use assets, net	0
Deferred financing costs, net	0
Deposits and other long-term assets	6,116
Total other assets	1,511,649
Total assets	1,907,054
Current liabilities
Accounts payable and accrued liabilities	58,858
Accounts payable - related parties	19,425
Advances from non-operators	811
Advances from related party	3,175
Asset retirement obligations, current portion	34
Total current liabilities not subject to compromise	82,303
Long-term liabilities
Long-term portion	12,995
Total long-term liabilities not subject to compromise	12,995
Liabilities subject to compromise	896,862
Total liabilities	992,160
Noncontrolling interest	914,894
Total liabilities and stockholders’ equity	$ 1,907,054