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	11,784
Total current assets	326,189
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	1,139,120
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)	554,537
Accumulated deficit	0
Total stockholders’ equity	554,737
Total liabilities and stockholders’ equity	1,139,120
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	554,537
Accumulated deficit	2,073,875
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	11,033
Total current assets	276,195
Oil and gas properties, full cost method of accounting:
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	1,119,484
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	(2,309,679)
Total stockholders’ equity	(649,673)
Total liabilities and stockholders’ equity	1,119,484
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