Equity Method Investments (Tables)

9 Months Ended

Sep. 30, 2018

Equity Method Investments

Schedule of reconciliation of investments in unconsolidated affiliates

The following table is a reconciliation of our investments in these unconsolidated affiliates (in thousands):

			MarkWest	Total Investment in
		Stonewall	Joint Venture	Unconsolidated Affiliates
Balance at December 31, 2017	$	67,128	236,174	303,302
Additional investments		—	91,419	91,419
Equity in net income of unconsolidated affiliates		8,346	19,486	27,832
Distributions from unconsolidated affiliates		(7,515)	(22,145)	(29,660)
Balance at September 30, 2018	$	67,959	324,934	392,893