Derivatives (Current and Noncurrent Derivative Assets) (Details) - Commodity Contract - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Derivatives, Fair Value [Line Items]
Commodity derivative assets	$ 187,745	$ 176,665	$ 169,124
Commodity derivative liabilities	(120,097)	(125,639)	(179,916)
Cash collateral paid	20,457	39,025	49,341
Total	88,105	90,051	38,549
Commodity derivative assets - current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	178,243	165,038	154,042
Commodity derivative liabilities	(44,251)	(55,262)	(81,057)
Cash collateral paid	20,457	39,025	49,341
Derivative Asset, Fair Value, Amount Offset Against Collateral Including Subject To Master Netting Arrangement	154,449	148,801	122,326
Commodity derivative assets - noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	2,712	1,441	3,656
Commodity derivative liabilities	(55)	(28)	(96)
Cash collateral paid	0	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral Including Subject To Master Netting Arrangement	2,657	1,413	3,560
Commodity derivative liabilities - current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	6,723	10,158	11,207
Commodity derivative liabilities	(75,341)	(69,924)	(96,847)
Cash collateral paid	0	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral Including Before Subject To Master Netting Arrangement	68,618	59,766	85,640
Commodity derivative liabilities - noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	67	28	219
Commodity derivative liabilities	(450)	(425)	(1,916)
Cash collateral paid	0	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral Including Before Subject To Master Netting Arrangement	$ 383	$ 397	$ 1,697

Derivative Asset, Fair Value, Amount Offset Against Collateral Including Subject To Master Netting Arrangement

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Derivative Liability, Fair Value, Amount Not Offset Against Collateral Including Before Subject To Master Netting Arrangement

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement.

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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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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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