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Acquisitions and Divestitures - Additional Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2019
Jan. 18, 2019
USD ($)
Dec. 14, 2018
USD ($)
Jun. 27, 2018
USD ($)
Jun. 01, 2018
USD ($)
Mar. 17, 2017
USD ($)
Mar. 31, 2019
MBbls / d
Mcf / d
mi
bbl
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Property, Plant and Equipment [Line Items]                    
Acquisition, net investment               $ 92,546 $ 162,615  
Newcastle System [Member]                    
Property, Plant and Equipment [Line Items]                    
Proceeds from the sale of assets     $ 3,200              
Gain (loss) on sale of assets                 600  
Helper And Clawson Systems [Member]                    
Property, Plant and Equipment [Line Items]                    
Gain (loss) on sale of assets                   $ 16,300
Affiliates [Member]                    
Property, Plant and Equipment [Line Items]                    
Cash payment for acquisition               2,007,926 254 3,910
Cash payment to settle the Deferred purchase price obligation - Anadarko [1]               0 0 37,346
Deferred Purchase Price Obligation - Anadarko [Member] | Affiliates [Member]                    
Property, Plant and Equipment [Line Items]                    
Cash payment to settle the Deferred purchase price obligation - Anadarko               $ 0 $ 0 37,346
Non-Operated Marcellus Interest [Member]                    
Property, Plant and Equipment [Line Items]                    
Percentage ownership interest           33.75%        
Newcastle System [Member] | Newcastle System [Member]                    
Property, Plant and Equipment [Line Items]                    
Percentage ownership interest     50.00%              
Wattenberg Processing Plant [Member] | Cryogenic Train [Member]                    
Property, Plant and Equipment [Line Items]                    
Gas processing capacity | Mcf / d             190,000      
Wattenberg Processing Plant [Member] | Refrigeration Train [Member]                    
Property, Plant and Equipment [Line Items]                    
Gas processing capacity | Mcf / d             80,000      
DJ Basin Oil System [Member]                    
Property, Plant and Equipment [Line Items]                    
Oil processing capacity | MBbls / d             155      
DJ Basin Oil System [Member] | Pipelines [Member]                    
Property, Plant and Equipment [Line Items]                    
Pipeline miles | mi             12      
DJ Basin Oil System [Member] | Storage Tank [Member]                    
Property, Plant and Equipment [Line Items]                    
Storage capacity - barrels | bbl             500,000      
DBM Oil System [Member] | Pipelines [Member]                    
Property, Plant and Equipment [Line Items]                    
Pipeline miles | mi             14      
DBM Oil System [Member] | Storage Tank [Member]                    
Property, Plant and Equipment [Line Items]                    
Storage capacity - barrels | bbl             30,000      
DBM Oil System [Member] | Central Production Facilities [Member]                    
Property, Plant and Equipment [Line Items]                    
Oil processing capacity | MBbls / d             75      
DBM Oil System [Member] | Regional Oil Treating Facilities [Member]                    
Property, Plant and Equipment [Line Items]                    
Oil processing capacity | MBbls / d             120      
APC Water Systems [Member]                    
Property, Plant and Equipment [Line Items]                    
Produced-water processing capacity | MBbls / d             565      
Saddlehorn [Member]                    
Property, Plant and Equipment [Line Items]                    
Ownership percentage acquired 20.00%                  
Saddlehorn [Member] | Storage Tank [Member]                    
Property, Plant and Equipment [Line Items]                    
Storage capacity - barrels | bbl             300,000      
Panola [Member]                    
Property, Plant and Equipment [Line Items]                    
Ownership percentage acquired 15.00%                  
Panola [Member] | Pipelines [Member]                    
Property, Plant and Equipment [Line Items]                    
Pipeline miles | mi             248      
Mi Vida [Member]                    
Property, Plant and Equipment [Line Items]                    
Gas processing capacity | Mcf / d             200,000      
Ownership percentage acquired 50.00%                  
Ranch Westex [Member]                    
Property, Plant and Equipment [Line Items]                    
Ownership percentage acquired 50.00%                  
Ranch Westex [Member] | Cryogenic Train [Member]                    
Property, Plant and Equipment [Line Items]                    
Gas processing capacity | Mcf / d             100,000      
Ranch Westex [Member] | Refrigeration Train [Member]                    
Property, Plant and Equipment [Line Items]                    
Gas processing capacity | Mcf / d             25,000      
Red Bluff Express [Member]                    
Property, Plant and Equipment [Line Items]                    
Ownership percentage acquired   30.00%                
Acquisition, net investment   $ 92,500                
Whitethorn LLC [Member]                    
Property, Plant and Equipment [Line Items]                    
Ownership percentage acquired         20.00%          
Acquisition, net investment         $ 150,600          
Cactus II [Member]                    
Property, Plant and Equipment [Line Items]                    
Ownership percentage acquired       15.00%            
Acquisition, net investment       $ 12,100            
Delaware Basin JV Gathering LLC [Member]                    
Property, Plant and Equipment [Line Items]                    
Ownership percentage acquired           50.00%        
Cash payment for acquisition           $ 155,000        
Gain (loss) recognized on property exchange                   125,700
Delaware Basin JV Gathering LLC [Member] | Deferred Purchase Price Obligation - Anadarko [Member] | Affiliates [Member]                    
Property, Plant and Equipment [Line Items]                    
Cash payment to settle the Deferred purchase price obligation - Anadarko                   $ 37,300
Delaware Basin JV Gathering LLC [Member] | Delaware Basin JV Gathering LLC [Member]                    
Property, Plant and Equipment [Line Items]                    
Percentage ownership interest           50.00%        
[1]
See Note 3.