Intangible Assets (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) a	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Beginning balance	$ 145,246	$ 158,706	$ 158,706
Amortization	(3,364)	$ 3,400	(13,460)
Ending balance	$ 141,882		$ 145,246
Dimmit, La Salle And Webb Counties, Texas | Sanchez Energy
Finite-Lived Intangible Assets [Line Items]
Net acres assembled | a	106,000
Customer Contracts
Finite-Lived Intangible Assets [Line Items]
Agreement term (in years)	15 years
Dedicated acreage | a	35,000
Useful life	15 years