Quarterly report pursuant to Section 13 or 15(d)

Investments in Unconsolidated Affiliates (Details)

v3.21.2
Investments in Unconsolidated Affiliates (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
item
mi
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
item
mi
Sep. 30, 2020
USD ($)
Investments in unconsolidated affiliates        
Balance at beginning of period     $ 722,478  
Additional investments     2,070  
Equity in earnings of unconsolidated affiliates $ 24,088 $ 23,173 66,347 $ 63,197
Distributions from unconsolidated affiliates     (87,115) $ (69,313)
Balance at end of period $ 703,780   $ 703,780  
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     $ 137,632  
Equity in earnings of unconsolidated affiliates     4,918  
Distributions from unconsolidated affiliates     (10,215)  
Balance at end of period $ 132,335   $ 132,335  
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     $ 584,846  
Additional investments     2,070  
Equity in earnings of unconsolidated affiliates     61,429  
Distributions from unconsolidated affiliates     (76,900)  
Balance at end of period $ 571,445   $ 571,445