Number of miles the pipeline is operated.

No definition available.

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- Definition

The cash outflow associated with additional investments in or advances to an entity in which the reporting entity shares control of the entity with another party or group. Excludes initial investment.

+ References

No definition available.

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- Definition

Percentage of interest held in third party assets by our joint venture.

+ References

No definition available.

+ Details

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- Definition

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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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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-Publisher FASB
-Name Accounting Standards Codification
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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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- References

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The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

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- Definition

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.

+ References

No definition available.

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Equity Method Investments (Details) $ in Thousands		3 Months Ended		6 Months Ended
Equity Method Investments (Details) $ in Thousands	Feb. 06, 2017	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 mi
Equity Method Investments
Contribution to joint venture				$ 56,297	$ 191,364
Investments in unconsolidated affiliates
Balance at beginning of period				303,302
Additional investments				56,297
Equity in net income of unconsolidated affiliates		$ 9,264	$ 3,623	17,126	5,854
Distributions from unconsolidated affiliates				(17,895)	$ (5,820)
Balance at end of period		358,830		358,830
MarkWest
Investments in unconsolidated affiliates
Balance at beginning of period				236,174
Additional investments				56,297
Equity in net income of unconsolidated affiliates				11,584
Distributions from unconsolidated affiliates				(13,305)
Balance at end of period		290,750		290,750
Stonewall
Investments in unconsolidated affiliates
Balance at beginning of period				67,128
Equity in net income of unconsolidated affiliates				5,542
Distributions from unconsolidated affiliates				(4,590)
Balance at end of period		$ 68,080		$ 68,080
Appalachia Joint venture
Equity Method Investments
Ownership percentage	50.00%
Percentage of interest held by joint venture in third party fractionator in Ohio	33.33%
Appalachia Joint venture \| MarkWest
Equity Method Investments
Ownership percentage	50.00%	50.00%		50.00%
Stonewall Gas Gathering LLC
Equity Method Investments
Ownership percentage		15.00%		15.00%		15.00%
Number of miles \| mi						67