FRESH START ACCOUNTING - Schedule of Fresh-Start Adjustments (Details) $ in Thousands	Feb. 28, 2017 USD ($)
Current assets:
Cash and cash equivalents	$ 162,966
Restricted cash	75,547
Accounts receivable	52,109
Fair value of derivative contracts	1,267
Current income tax receivable	22,516
Other current assets	11,675
Total current assets	326,080
Proved	670,852
Less: accumulated DD&A	0
Net proved oil and gas properties	670,852
Unevaluated	97,010
Other property and equipment, net	21,062
Fair value of derivative contracts	1,819
Other assets, net	22,188
Total assets	1,139,011
Current liabilities:
Accounts payable to vendors	20,512
Undistributed oil and gas proceeds	1,778
Accrued interest	266
Asset retirement obligations	92,597
Fair value of derivative contracts	476
Current portion of long-term debt	411
Other current liabilities	16,837
Total current liabilities	132,877
Long-term debt	235,850
Asset retirement obligations	197,470
Fair value of derivative contracts	653
Other long-term liabilities	17,533
Total liabilities not subject to compromise	584,383
Liabilities subject to compromise	0
Total liabilities	584,383
Stockholders’ equity:
Common stock (Successor)	200
Additional paid-in capital (Successor)	554,428
Accumulated deficit	0
Total stockholders’ equity	554,628
Total liabilities and stockholders’ equity	1,139,011
Reorganization Adjustments
Current assets:
Cash and cash equivalents	(35,605)
Restricted cash	75,547
Accounts receivable	9,301
Fair value of derivative contracts	0
Current income tax receivable	0
Other current assets	875
Total current assets	50,118
Proved	(188,933)
Less: accumulated DD&A	0
Net proved oil and gas properties	(188,933)
Unevaluated	(127,838)
Other property and equipment, net	(101)
Fair value of derivative contracts	0
Other assets, net	(4,328)
Total assets	(271,082)
Current liabilities:
Accounts payable to vendors	0
Undistributed oil and gas proceeds	(4,139)
Accrued interest	0
Asset retirement obligations	0
Fair value of derivative contracts	0
Current portion of long-term debt	0
Other current liabilities	(195)
Total current liabilities	(4,334)
Long-term debt	(116,500)
Asset retirement obligations	(8,672)
Fair value of derivative contracts	0
Other long-term liabilities	0
Total liabilities not subject to compromise	(129,506)
Liabilities subject to compromise	(1,110,182)
Total liabilities	(1,239,688)
Stockholders’ equity:
Common stock	200
Additional paid-in capital	554,428
Accumulated deficit	2,073,984
Total stockholders’ equity	968,606
Total liabilities and stockholders’ equity	(271,082)
Fresh Start Adjustments
Current assets:
Cash and cash equivalents	0
Restricted cash	0
Accounts receivable	0
Fair value of derivative contracts	0
Current income tax receivable	0
Other current assets	(124)
Total current assets	(124)
Proved	(8,774,122)
Less: accumulated DD&A	9,215,679
Net proved oil and gas properties	441,557
Unevaluated	(146,292)
Other property and equipment, net	(4,423)
Fair value of derivative contracts	0
Other assets, net	0
Total assets	290,718
Current liabilities:
Accounts payable to vendors	0
Undistributed oil and gas proceeds	0
Accrued interest	0
Asset retirement obligations	0
Fair value of derivative contracts	0
Current portion of long-term debt	0
Other current liabilities	0
Total current liabilities	0
Long-term debt	0
Asset retirement obligations	54,914
Fair value of derivative contracts	0
Other long-term liabilities	0
Total liabilities not subject to compromise	54,914
Liabilities subject to compromise	0
Total liabilities	54,914
Stockholders’ equity:
Common stock	0
Additional paid-in capital	0
Accumulated deficit	235,804
Total stockholders’ equity	235,804
Total liabilities and stockholders’ equity	290,718
Predecessor
Current assets:
Cash and cash equivalents	198,571
Restricted cash	0
Accounts receivable	42,808
Fair value of derivative contracts	1,267
Current income tax receivable	22,516
Other current assets	10,924
Total current assets	276,086
Proved	9,633,907
Less: accumulated DD&A	(9,215,679)
Net proved oil and gas properties	418,228
Unevaluated	371,140
Other property and equipment, net	25,586
Fair value of derivative contracts	1,819
Other assets, net	26,516
Total assets	1,119,375
Current liabilities:
Accounts payable to vendors	20,512
Undistributed oil and gas proceeds	5,917
Accrued interest	266
Asset retirement obligations	92,597
Fair value of derivative contracts	476
Current portion of long-term debt	411
Other current liabilities	17,032
Total current liabilities	137,211
Long-term debt	352,350
Asset retirement obligations	151,228
Fair value of derivative contracts	653
Other long-term liabilities	17,533
Total liabilities not subject to compromise	658,975
Liabilities subject to compromise	1,110,182
Total liabilities	1,769,157
Stockholders’ equity:
Common stock	56
Treasury stock (Predecessor)	(860)
Additional paid-in capital (Predecessor)	1,660,810
Accumulated deficit	(2,309,788)
Total stockholders’ equity	(649,782)
Total liabilities and stockholders’ equity	1,119,375
Predecessor | Reorganization Adjustments
Stockholders’ equity:
Common stock	(56)
Treasury stock (Predecessor)	860
Additional paid-in capital	(1,660,810)
Predecessor | Fresh Start Adjustments
Stockholders’ equity:
Common stock	0
Treasury stock (Predecessor)	0
Additional paid-in capital	$ 0