Derivative Instruments - Offsetting Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commodity Contract
Offsetting Assets [Line Items]
Gross Assets	$ 7,675	$ 420
Gross Amounts Offset	(3,405)	(109)
Net Assets	4,270	311
Cash Collateral Offset	0	0
Net Amount Presented	4,270	311
Commodity Contract, Current
Offsetting Assets [Line Items]
Gross Assets	7,264	420
Gross Amounts Offset	(3,334)	(109)
Net Assets	3,930	311
Cash Collateral Offset	0	0
Net Amount Presented	3,930	311
Non-trading commodity derivatives
Offsetting Assets [Line Items]
Gross Assets	7,121	308
Gross Amounts Offset	(3,319)	(105)
Net Assets	3,802	203
Cash Collateral Offset	0	0
Net Amount Presented	3,802	203
Trading commodity derivatives
Offsetting Assets [Line Items]
Gross Assets	143	112
Gross Amounts Offset	(15)	(4)
Net Assets	128	108
Cash Collateral Offset	0	0
Net Amount Presented	128	108
Commodity Contract, Noncurrent
Offsetting Assets [Line Items]
Gross Assets	411	0
Gross Amounts Offset	(71)	0
Net Assets	340	0
Cash Collateral Offset	0	0
Net Amount Presented	340	0
Non-trading commodity derivatives
Offsetting Assets [Line Items]
Gross Assets	411	0
Gross Amounts Offset	(71)	0
Net Assets	340	0
Cash Collateral Offset	0	0
Net Amount Presented	340	0
Trading commodity derivatives
Offsetting Assets [Line Items]
Gross Assets	0	0
Gross Amounts Offset	0	0
Net Assets	0	0
Cash Collateral Offset	0	0
Net Amount Presented	$ 0	$ 0

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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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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Fair value, after offset of derivative liability, of 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, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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