Derivative Accounting - Derivative Instruments in the Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Gross Recognized Derivatives		$ 132,229
Liabilities
Amounts  Reported on  Balance Sheets		(42,446)
Commodity Contracts
Assets
Gross Recognized Derivatives	$ 8,497	153,261
Amounts Offset	(1,694)	(21,191)
Net Recognized Derivatives	6,803	132,070
Other	5	28
Amounts  Reported on  Balance Sheets	6,808	132,098
Liabilities
Gross Recognized Derivatives	(128,711)	(56,893)
Amounts Offset	10,894	21,191
Net Recognized Derivatives	(117,817)	(35,702)
Other	(6,071)	(5,835)
Amounts  Reported on  Balance Sheets	(123,888)	(41,537)
Assets and Liabilities
Gross Recognized Derivatives	(120,214)	96,368
Amounts Offset	9,200	0
Net Recognized Derivatives	(111,014)	96,368
Other	(6,066)	(5,807)
Amounts  Reported on  Balance Sheets	(117,080)	90,561
Cash collateral provided or received subject to offsetting	9,200	0
Cash collateral received from counterparties	6,071	5,835
Cash margin provided to counterparties	5	28
Commodity Contracts | Current assets
Assets
Gross Recognized Derivatives	8,497	103,484
Amounts Offset	(1,694)	(15,808)
Net Recognized Derivatives	6,803	87,676
Other	5	28
Amounts  Reported on  Balance Sheets	6,808	87,704
Assets and Liabilities
Cash margin provided to counterparties	5	28
Commodity Contracts | Other Investments
Assets
Gross Recognized Derivatives	0	49,777
Amounts Offset	0	(5,383)
Net Recognized Derivatives	0	44,394
Other	0	0
Amounts  Reported on  Balance Sheets	0	44,394
Assets and Liabilities
Cash margin provided to counterparties	0	0
Commodity Contracts | Current liabilities
Liabilities
Gross Recognized Derivatives	(85,736)	(47,670)
Amounts Offset	10,894	15,808
Net Recognized Derivatives	(74,842)	(31,862)
Other	(6,071)	(5,835)
Amounts  Reported on  Balance Sheets	(80,913)	(37,697)
Assets and Liabilities
Cash collateral received from counterparties	6,071	5,835
Commodity Contracts | Deferred credits and other
Liabilities
Gross Recognized Derivatives	(42,975)	(9,223)
Amounts Offset	0	5,383
Net Recognized Derivatives	(42,975)	(3,840)
Other	0	0
Amounts  Reported on  Balance Sheets	(42,975)	(3,840)
Assets and Liabilities
Cash collateral received from counterparties	$ 0	$ 0