Investments in Unconsolidated Affiliates (Tables)

9 Months Ended

Sep. 30, 2022

Investments in Unconsolidated Affiliates

Schedule of reconciliation of investments in unconsolidated affiliates

					Total Investment
			MarkWest		in Unconsolidated
(in thousands)	Stonewall			Joint Venture	Affiliates
Balance as of December 31, 2021	$	130,572		565,437		696,009
Equity in earnings of unconsolidated affiliates (1)		5,367		65,100		70,467
Distributions from unconsolidated affiliates		(9,000)		(81,470)		(90,470)
Return of investment in unconsolidated affiliate		—		(17,000)		(17,000)
Balance as of September 30, 2022	$	126,939		532,067		659,006

(1) As adjusted for the amortization of the difference between the cost of the equity investments in Stonewall and the Joint Venture and the amount of the underlying equity in the net assets of Stonewall and the Joint Venture as of March 12, 2019.