Investments in Unconsolidated Affiliates (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) item mi	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) item mi	Jun. 30, 2021 USD ($)
Investments in unconsolidated affiliates
Balance at beginning of period			$ 696,009
Equity in earnings of unconsolidated affiliates	$ 22,824	$ 21,515	46,056	$ 42,259
Distributions from unconsolidated affiliates			(60,505)	$ (58,185)
Balance at end of period	$ 681,560		$ 681,560
Stonewall
Equity Method Investments
Ownership percentage	15.00%		15.00%
Number of miles of pipeline | mi	67		67
Investments in unconsolidated affiliates
Balance at beginning of period			$ 130,572
Equity in earnings of unconsolidated affiliates			3,429
Distributions from unconsolidated affiliates			(5,610)
Balance at end of period	$ 128,391		$ 128,391
MarkWest Joint Venture
Equity Method Investments
Ownership percentage	50.00%		50.00%
Percentage of interest held by joint venture in third party fractionator in Ohio			33.33%
Number of fractionators | item	2		2
Investments in unconsolidated affiliates
Balance at beginning of period			$ 565,437
Equity in earnings of unconsolidated affiliates			42,627
Distributions from unconsolidated affiliates			(54,895)
Balance at end of period	$ 553,169		$ 553,169