Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Results of Operations, Impairment of Oil and Gas Properties	$ 0	$ 881,100
Deferred Tax Assets, Valuation Allowance			$ 165,600
Effective Income Tax Rate, Continuing Operations	0.60%	(1.60%)