Derivative Instruments - Assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Net fair value of commodity derivative assets position
Commodity derivative assets
Gross amounts on balance sheet	$ 2,177	$ 181,375
Gross amounts offset on balance sheet	(2,177)	(69,542)
Total asset derivatives		111,833
Commodity derivative liabilities
Gross amounts on balance sheet	(743,834)	(199,956)
Gross amounts offset on balance sheet	2,177	69,542
Total liability derivatives	(741,657)	(130,414)
Embedded derivatives
Commodity derivative assets
Gross amounts on balance sheet	15,126	40,590
Total asset derivatives	$ 15,126	$ 40,590

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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