Derivatives (Effect Of Derivative Instruments Recognized In Statement Of Operations, Not Designated As Hedging Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, net	$ 13,595	$ (64,076)
Gain (loss) on derivatives settled (Note 12)	2,601	(21,239)
Gain (loss) on derivatives [Member] | Warrant
Derivative Instruments, Gain (Loss) [Line Items]
Loss on change in fair value of warrants	0	(36,612)
Commodity derivative liabilities | Gain (loss) on derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, net	13,595	(64,076)
Gain (loss) on derivatives settled (Note 12)	2,601	(21,239)
Gain (loss) on derivatives, net less gain (loss) on commodity derivatives settled	$ 10,994	$ (42,837)