Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	2 Months Ended	4 Months Ended	6 Months Ended
	Jun. 30, 2016	Apr. 22, 2016	Jun. 30, 2015
Predecessor [Member]
Cash Flows from Operating Activities:
Net Income (Loss)		$ 851,611	$ (769,944)
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation, depletion, and amortization		20,439	102,786
Write-down of oil and gas properties		77,732	763,073
Accretion of asset retirement obligation		1,610	2,746
Deferred income taxes		0	(80,133)
Stock-based compensation expenses		886	2,153
Loss on derivatives		0	(251)
Reorganization items (non-cash)		(977,696)	0
Other Noncash Income (Expense)		229	3,857
(Increase) Decrease in accounts receivable and other current assets		(5,474)	9,041
Increase (decrease) in accounts payable and accrued liabilities		(10,495)	(3,997)
Increase (decrease) in accrued interest		(308)	108
Net Cash Provided by Operating Activities		(41,466)	29,439
Cash Flows from Investing Activities:
Additions to property and equipment		(24,530)	(104,997)
Proceeds from the sale of property and equipment		(48,661)	(946)
Net Cash Used in Investing Activities		24,131	(104,051)
Cash Flows from Financing Activities:
Net proceeds from New Credit Facility		328,000	180,500
Payments of bank borrowings		(324,900)	(105,800)
Net proceeds from issuances of common stock		0	302
Purchase of treasury shares		(4)	(150)
Payments of debt issuance costs		(6,482)	(571)
Net Cash Used in Financing Activities		(3,386)	74,281
Net Increase (Decrease) in Cash and Cash Equivalents		(20,721)	(331)
Cash and Cash Equivalents at Beginning of Period	$ 8,739	29,460	406
Cash and Cash Equivalents at End of Period		8,739	75
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized		10,367	35,488
Cash paid for reorganization items		15,643	0
Increase (decrease) in accrued payables for capital expenditures		$ 1,843	$ (46,843)
Successor [Member]
Cash Flows from Operating Activities:
Net Income (Loss)	(149,601)
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation, depletion, and amortization	13,334
Write-down of oil and gas properties	133,496
Accretion of asset retirement obligation	832
Deferred income taxes	0
Stock-based compensation expenses	191
Loss on derivatives	9,912
Reorganization items (non-cash)	0
Other Noncash Income (Expense)	438
(Increase) Decrease in accounts receivable and other current assets	13,379
Increase (decrease) in accounts payable and accrued liabilities	(6,621)
Increase (decrease) in accrued interest	573
Net Cash Provided by Operating Activities	15,933
Cash Flows from Investing Activities:
Additions to property and equipment	(20,876)
Proceeds from the sale of property and equipment	0
Net Cash Used in Investing Activities	(20,876)
Cash Flows from Financing Activities:
Net proceeds from New Credit Facility	21,000
Payments of bank borrowings	(20,000)
Net proceeds from issuances of common stock	0
Purchase of treasury shares	0
Payments of debt issuance costs	(502)
Net Cash Used in Financing Activities	498
Net Increase (Decrease) in Cash and Cash Equivalents	(4,445)
Cash and Cash Equivalents at End of Period	4,294
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized	3,246
Cash paid for reorganization items	4,080
Increase (decrease) in accrued payables for capital expenditures	$ (8,353)