Derivatives (Gross Current and Noncurrent Assets and Liabilities) (Details) - Commodity - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Derivatives, Fair Value [Line Items]
Commodity derivative assets	$ 297,565	$ 210,919	$ 468,557
Commodity derivative liabilities	(220,583)	(147,110)	(357,910)
Cash collateral paid (received)	(25,316)
Cash collateral paid (received)		24,439	(15,290)
Total	51,666	88,248	95,357
Commodity Derivative Assets - Current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	276,764	201,542	438,227
Commodity derivative liabilities	(71,259)	(47,898)	(75,253)
Cash collateral paid (received)	(25,316)
Cash collateral paid (received)		24,439	(15,290)
Derivative assets	180,189	178,083	347,684
Commodity Derivative Assets - Noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	8,141	1,496	3,959
Commodity derivative liabilities	(96)	(64)	(1,029)
Cash collateral paid (received)	0
Cash collateral paid (received)		0	0
Derivative assets	8,045	1,432	2,930
Commodity Derivative Liabilities - Current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	12,625	7,868	26,312
Commodity derivative liabilities	(141,472)	(98,717)	(277,413)
Cash collateral paid (received)	0
Cash collateral paid (received)		0	0
Derivative Liability	(128,847)	(90,849)	(251,101)
Commodity Derivative Liabilities - Noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	35	13	59
Commodity derivative liabilities	(7,756)	(431)	(4,215)
Cash collateral paid (received)	0
Cash collateral paid (received)		0	0
Derivative Liability	$ (7,721)	$ (418)	$ (4,156)