Derivative Instruments - Fair value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair value of derivative instruments
Current portion of fair value of derivative assets	$ 2,563	$ 1,900
Noncurrent portion of fair value of derivative assets	6,627	9,844
Current portion of fair value of derivative liabilities	31,134	97,765
Noncurrent portion of fair value of derivative liabilities	52,584	345,280
Derivatives not designated as hedges for accounting purposes
Fair value of derivative instruments
Total asset derivatives	9,190	11,744
Total liability derivatives	83,718	443,045
Net derivatives liability	(74,528)	(431,301)
Derivatives not designated as hedges for accounting purposes | Commodity derivatives
Fair value of derivative instruments
Current portion of fair value of derivative liabilities	31,134	97,765
Noncurrent portion of fair value of derivative liabilities	52,584	345,280
Derivatives not designated as hedges for accounting purposes | Commodity derivatives | VIE, Martica
Fair value of derivative instruments
Current portion of fair value of derivative liabilities	9,000	28,000
Noncurrent portion of fair value of derivative liabilities	6,000	19,000
Total liability derivatives	15,000	47,000
Derivatives not designated as hedges for accounting purposes | Embedded derivatives
Fair value of derivative instruments
Current portion of fair value of derivative assets	2,563	1,900
Noncurrent portion of fair value of derivative assets	$ 6,627	$ 9,844