Impairment of Natural Gas and Crude Oil Properties (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Impairment of natural gas and crude oil properties [Line Items]
Document Period End Date	Mar. 31, 2020
Delaware Basin Proved Property Impairment	$ 753,000
Delaware Basin Unproved Property Impairment	127,300
Results of Operations, Impairment of Oil and Gas Properties	881,074	$ 7,875
Delaware Basin Assets [Member]
Impairment of natural gas and crude oil properties [Line Items]
Results of Operations, Impairment of Oil and Gas Properties	$ 881,100	$ 7,900