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Debt Instrument, Minimum Pro Rata Share of Commitments

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Plan of Reorganization, Percentage of Common Stock Issued in Reorganization

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Plan of Reorganization, Percentage of Common Stock Issued in Reorganization to Existing Shareholders

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Plan of Reorganization, Percentage of Unfavorable Votes

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Plan of Reorganization, Percentage of Warrants Issued in Reorganization

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Plan of Reorganization, Pro Rata Share of Net Cash Proceeds

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

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Gross amount of debt extinguished.

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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CHAPTER 11 PROCEEDINGS - Additional Information (Details) a in Thousands							12 Months Ended
	Feb. 15, 2017	Feb. 08, 2017 USD ($)	Dec. 16, 2016	Dec. 14, 2016 USD ($)	Dec. 09, 2016 a	Oct. 20, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Percentage of aggregate principal amount owned				100.00%
Proceeds from sale of oil and gas properties, net of expenses								$ 0	$ 22,839,000	$ 242,914,000
Forecast
Restructuring Cost and Reserve [Line Items]
Extinguishment of debt							$ 1,191,500,000
Senior Notes \| Notes Due Two Thousand Twenty Two
Restructuring Cost and Reserve [Line Items]
Interest rate								7.50%
Noteholders
Restructuring Cost and Reserve [Line Items]
Percentage of favorable votes to accept plan			99.95%
Banks
Restructuring Cost and Reserve [Line Items]
Minimum pro rata share of commitments				$ 25,000,000
TH Exploration III, LLC, an affiliate of Tug Hill, Inc. \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of oil and gas properties, net of expenses						$ 360,000,000
Escrow deposit						$ 5,000,000
EQT Production Company \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Subsequent Event
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of oil and gas properties, net of expenses		$ 527,000,000
RSA
Restructuring Cost and Reserve [Line Items]
Percentage of common stock issued in reorganization to existing shareholders				5.00%
Percentage of warrants issued in reorganization (up to)				15.00%
Percentage of recovery of outstanding principal				100.00%
Acreage sold in agreement \| a					86
RSA \| Subsequent Event
Restructuring Cost and Reserve [Line Items]
Percentage of common stock issued in reorganization to existing shareholders	5.00%
Percentage of warrants issued in reorganization (up to)	15.00%
RSA \| Noteholders
Restructuring Cost and Reserve [Line Items]
Percentage of aggregate principal amount owned			94.24%	79.70%
Percentage of unfavorable votes to accept plan			0.05%
Pro rata share of net cash proceeds				$ 100,000,000
Percentage of common stock issued in reorganization				95.00%
RSA \| Noteholders \| Senior Notes \| Second Lien Notes
Restructuring Cost and Reserve [Line Items]
Repayments of debt				$ 225,000,000
Interest rate								7.50%
RSA \| Banks
Restructuring Cost and Reserve [Line Items]
Percentage of aggregate principal amount owned				100.00%
Percentage of favorable votes to accept plan			100.00%