Derivative Financial Instruments (Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Commodity futures, asset derivatives	$ 6,159	$ 4,271
Commodity futures, liability derivatives	5,192	7,388
Designated as hedging instrument \| Commodity contract \| Futures \| Other current assets
Commodity futures, asset derivatives	3,055	2,169
Commodity futures, liability derivatives	1,958	2,119
Not designated as hedging instrument \| Commodity contract \| Futures \| Other current assets
Commodity futures, asset derivatives	3,104	2,102
Commodity futures, liability derivatives	$ 3,234	$ 5,269

Fair value, before effects of master netting arrangements, of a financial liability or 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. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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