Acquisitions and Divestitures - Additional Information (Details) $ in Thousands					3 Months Ended	6 Months Ended
	Feb. 28, 2019	Jan. 18, 2019 USD ($)	Jun. 27, 2018 USD ($)	Jun. 01, 2018 USD ($)	Mar. 31, 2019 MBbls / d Mcf / d mi bbl	Jun. 30, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Acquisition, net investment | $						$ 92,546
Wattenberg Processing Plant [Member] | Cryogenic Train [Member]
Property, Plant and Equipment [Line Items]
Gas processing capacity					190,000
Wattenberg Processing Plant [Member] | Refrigeration Train [Member]
Property, Plant and Equipment [Line Items]
Gas processing capacity					100,000
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					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					100,000
Ranch Westex [Member] | Refrigeration Train [Member]
Property, Plant and Equipment [Line Items]
Gas processing capacity					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