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Transactions with Affiliates - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 14, 2019
Jun. 20, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]          
General and administrative expense — affiliate     $ 8,523 $ 8,846 $ 8,677
Blanco River DevCo LP          
Related Party Transaction [Line Items]          
Interest in partnership 60.00% 15.00%      
Green River DevCo LP          
Related Party Transaction [Line Items]          
Interest in partnership 75.00%        
San Juan River DevCo LP          
Related Party Transaction [Line Items]          
Interest in partnership 75.00%        
Blanco River And Colorado River DevCos          
Related Party Transaction [Line Items]          
Consideration transferred $ 1,600,000 $ 270,000      
Payments to acquire businesses $ 670,000 $ 245,000      
Equity interest issued (shares) 38,455,018 562,430      
Colorado River DevCo          
Related Party Transaction [Line Items]          
Interest in partnership   20.00%      
Noble Energy          
Related Party Transaction [Line Items]          
General and administrative expense — affiliate     $ 6,900    
Noble Energy | Noble Energy          
Related Party Transaction [Line Items]          
Initial term     15 years    
Renewal term     1 year