Derivatives (Gross Current and Noncurrent Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Derivatives, Fair Value [Line Items]
Commodity derivative assets - current	$ 502,097	$ 410,813	$ 409,647
Commodity derivative liabilities - current	(137,168)	(128,911)	(78,702)
Commodity
Derivatives, Fair Value [Line Items]
Commodity derivative assets	562,830	368,969	419,591
Commodity derivative liabilities	(348,266)	(249,114)	(221,473)
Cash collateral paid	152,603	165,250
Cash collateral paid			136,977
Total	367,167	285,105	335,095
Commodity \| Commodity Derivative Assets - Current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	529,456	339,321	380,391
Commodity derivative liabilities	(179,962)	(93,758)	(107,721)
Cash collateral paid	152,603	165,250
Cash collateral paid			136,977
Commodity derivative assets - current	502,097	410,813	409,647
Commodity \| Commodity Derivative Assets - Noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	7,743	4,677	11,704
Commodity derivative liabilities	(1,008)	(105)	(370)
Cash collateral paid	0	0
Cash collateral paid			0
Commodity derivative assets - noncurrent	6,735	4,572	11,334
Commodity \| Commodity Derivative Liabilities - Current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	24,143	23,762	27,035
Commodity derivative liabilities	(161,311)	(152,673)	(105,737)
Cash collateral paid	0	0
Cash collateral paid			0
Commodity derivative liabilities - current	(137,168)	(128,911)	(78,702)
Commodity \| Commodity Derivative Liabilities - Noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	1,488	1,209	461
Commodity derivative liabilities	(5,985)	(2,578)	(7,645)
Cash collateral paid	0	0
Cash collateral paid			0
Commodity derivative liabilities - noncurrent	$ (4,497)	$ (1,369)	$ (7,184)

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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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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