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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Fair value as of the balance sheet date of price risk derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets on the balance sheet.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Summary of Significant Accounting Policies - Principles of Consolidation (Details) $ in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2018 USD ($) segment Counterparty	Dec. 31, 2017	Dec. 31, 2016 USD ($)	Dec. 31, 2018 USD ($) Counterparty
Derivative Financial Instruments
Fair value of commodity derivative contracts	$ 607,000			$ 607,000
Number of counterparties \| Counterparty	16			16
Industry Segment and Geographic Information
Number of operating segments \| segment	4
Basis of Presentation
Other comprehensive income (loss)				$ 0
Proceeds from issuance of stock			$ 1,012,431
Accounts Payable
Basis of Presentation
Bank Overdrafts	$ 10,000			10,000
Revenue distributions payable
Basis of Presentation
Bank Overdrafts	28,000			28,000
Morgan Stanley
Derivative Financial Instruments
Fair value of commodity derivative contracts	115,000			115,000
JP Morgan
Derivative Financial Instruments
Fair value of commodity derivative contracts	102,000			102,000
Scotiabank
Derivative Financial Instruments
Fair value of commodity derivative contracts	97,000			97,000
Citigroup
Derivative Financial Instruments
Fair value of commodity derivative contracts	91,000			91,000
Wells Fargo
Derivative Financial Instruments
Fair value of commodity derivative contracts	80,000			80,000
Canadian Imperial Bank of Commerce
Derivative Financial Instruments
Fair value of commodity derivative contracts	51,000			51,000
BNP Paribas
Derivative Financial Instruments
Fair value of commodity derivative contracts	24,000			24,000
Bank of Montreal
Derivative Financial Instruments
Fair value of commodity derivative contracts	14,000			14,000
Toronto Dominion
Derivative Financial Instruments
Fair value of commodity derivative contracts	8,000			8,000
PNC
Derivative Financial Instruments
Fair value of commodity derivative contracts	8,000			8,000
SunTrust
Derivative Financial Instruments
Fair value of commodity derivative contracts	7,000			7,000
Natixis
Derivative Financial Instruments
Fair value of commodity derivative contracts	7,000			7,000
Capital One
Derivative Financial Instruments
Fair value of commodity derivative contracts	$ 3,000			$ 3,000
Antero Midstream Partners LP
Basis of Presentation
Antero Resources ownership in Antero Midstream	52.80%	52.90%