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Risk Management And Derivatives: Derivatives by Balance Sheet Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Designated as Hedging Instrument
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	$ 2,035	$ 116
Commodity Contract | Not Designated as Hedging Instrument
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	1,701	(118)
Derivative Assets, Current | Commodity Contract | Designated as Hedging Instrument
Derivative Asset, Fair Value, Gross Asset	2,017	181
Derivative Assets, Current | Commodity Contract | Not Designated as Hedging Instrument
Derivative Asset, Fair Value, Gross Asset	2,356	1,667
Derivative Assets, Noncurrent | Commodity Contract | Designated as Hedging Instrument
Derivative Asset, Fair Value, Gross Asset	18	43
Derivative Assets, Noncurrent | Commodity Contract | Not Designated as Hedging Instrument
Derivative Asset, Fair Value, Gross Asset	804	151
Derivative Liabilities, Current | Commodity Contract | Designated as Hedging Instrument
Derivative Liability, Fair Value, Gross Liability	0	(108)
Derivative Liabilities, Current | Commodity Contract | Not Designated as Hedging Instrument
Derivative Liability, Fair Value, Gross Liability	(1,439)	(1,936)
Derivative Liabilities, Noncurrent | Commodity Contract | Not Designated as Hedging Instrument
Derivative Liability, Fair Value, Gross Liability	$ (20)	$ 0

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

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