Note 8 - Asset Retirement Obligations - Schedule of Reconciliation of Changes in the Asset Retirement Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Balance at Beginning of Period	$ 248,769	$ 271,952
Accretion Expense	18,652	17,905
Payments	(18,144)	(13,529)
Revisions in Estimated Cash Flows	(10,334)	(9,248)
Other	(825)	(18,311)
Balance at End of Period	$ 238,118	$ 248,769

The amount of gain (loss) on disposition of degasification wells.

No definition available.

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- Definition

Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

+ References

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

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- Definition

Amount of cash paid during the period to settle an asset retirement obligation. Amounts paid to settle an asset retirement obligation are generally included in the operating section of the Statement of Cash Flows.

+ References

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- Definition

Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

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