Disposal Group, Including Discontinued Operations, Asset Retirement Obligations Assumed

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- Definition

Proceeds from Asset Exchange Agreement

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- Definition

Wells, Minimum Commitment

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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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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

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In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Acquisitions and Dispositions - Narrative (Details)						3 Months Ended			9 Months Ended
Acquisitions and Dispositions - Narrative (Details)	Aug. 31, 2018 USD ($)	May 02, 2018 USD ($) well	Mar. 30, 2018 USD ($)	Jan. 03, 2018 USD ($)	Dec. 14, 2017 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Business Acquisition [Line Items]
Net gain (loss) on sale		$ 286,000				$ 3,308,000	$ 134,320,000		$ 610,000	$ 148,942,000
Proceeds from Asset Exchange Agreement		$ 7,000,000
Minimum commitment of wells \| well		40
Impairment of intangible asset						0	0		0	18,650,000
Gain on remeasurement of fair value of previously held equity interest						$ 0	$ 0		$ 0	623,663,000
Midstream Acquisition
Business Acquisition [Line Items]
Cash consideration transferred				$ 305,000,000	$ 305,000,000
Fair value of previously held equity interest				799,033,000
Gain on remeasurement of fair value of previously held equity interest				$ 623,663,000
Utica Shale
Business Acquisition [Line Items]
Cash consideration received in sale of oil and gas assets	$ 381,214,000
Net gain (loss) on sale	$ 130,849,000
Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia
Business Acquisition [Line Items]
Cash consideration received in sale of oil and gas assets			$ 89,296,000
Net gain (loss) on sale										4,432,000
Asset retirement obligations assumed			$ 196,514,000
CNX Gathering LLC
Business Acquisition [Line Items]
Ownership percentage in equity method investment				50.00%	50.00%	50.00%			50.00%
CONE Midstream GP LLC
Business Acquisition [Line Items]
Ownership percentage by parent					100.00%
Customer Relationships
Business Acquisition [Line Items]
Impairment of intangible asset										$ 18,650,000
Customer Relationships \| Midstream Acquisition
Business Acquisition [Line Items]
Impairment of intangible asset						$ 0		$ 18,650,000