Derivative Instruments - Schedule of Derivative Assets at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Changes in fair value of derivatives
Change in unrealized loss on natural gas derivatives			$ (899)	$ 0
Call Option
Changes in fair value of derivatives
Fair value of natural gas derivatives, beginning of period	$ 0	$ 0	0	0
Purchases of natural gas derivatives	2,241	0	2,241	0
Unrealized gains (losses) transferred to realized gains (losses), net	(216)	0	(216)	0
Change in unrealized loss on natural gas derivatives	(899)	0	(899)	0
Fair value of natural gas derivatives, end of period	1,126	0	1,126	0
Realized gain (loss) from derivative instruments
Unrealized gains (losses) transferred to realized gains (losses), net	(216)	0	(216)	0
Derivative payments received	380	0	380	0
Realized gain (loss) from natural gas derivatives, net	$ 164	$ 0	$ 164	$ 0

Changes in Fair Value of Derivatives Assets

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Unrealized Gains (Losses) Transferred to Realized Gains (Losses), Net

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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.

+ References

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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The cash outflow for derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

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The cash inflow provided by derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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