Derivatives (Gross Current and Noncurrent Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Derivatives, Fair Value [Line Items]
Commodity derivative assets - current	$ 638,357	$ 410,813	$ 507,148
Commodity derivative liabilities - current	(185,903)	(128,911)	(90,366)
Commodity
Derivatives, Fair Value [Line Items]
Commodity derivative assets	752,967	368,969	598,416
Commodity derivative liabilities	(368,925)	(249,114)	(388,947)
Cash collateral paid	70,442	165,250
Cash collateral paid			219,469
Total	454,484	285,105	428,938
Commodity \| Commodity Derivative Assets - Current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	707,542	339,321	547,186
Commodity derivative liabilities	(138,627)	(93,758)	(259,507)
Cash collateral paid	69,442	165,250
Cash collateral paid			219,469
Commodity derivative assets - current	638,357	410,813	507,148
Commodity \| Commodity Derivative Assets - Noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	14,257	4,677	16,480
Commodity derivative liabilities	(2,132)	(105)	(873)
Cash collateral paid	0	0
Cash collateral paid			0
Commodity derivative assets - noncurrent	12,125	4,572	15,607
Commodity \| Commodity Derivative Liabilities - Current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	29,223	23,762	34,327
Commodity derivative liabilities	(216,126)	(152,673)	(124,693)
Cash collateral paid	1,000	0
Cash collateral paid			0
Commodity derivative liabilities - current	(185,903)	(128,911)	(90,366)
Commodity \| Commodity Derivative Liabilities - Noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	1,945	1,209	423
Commodity derivative liabilities	(12,040)	(2,578)	(3,874)
Cash collateral paid	0	0
Cash collateral paid			0
Commodity derivative liabilities - noncurrent	$ (10,095)	$ (1,369)	$ (3,451)

Carrying amount as of the balance sheet date of the asset arising from commodity contracts such as futures contracts tied to the movement of a particular commodity, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer.

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Carrying amount as of the balance sheet date of the asset arising from commodity contracts such as futures contracts tied to the movement of a particular commodity, which are expected to be converted into cash or otherwise disposed of after a year or beyond the normal operating cycle, if longer.

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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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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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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 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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Fair value, after the 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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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