Derivatives (Current and Noncurrent Derivative Assets) (Details) - Commodity Contract - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Derivatives, Fair Value [Line Items]
Commodity derivative assets	$ 196,177	$ 176,665	$ 297,565
Commodity derivative liabilities	(130,653)	(125,639)	(220,583)
Cash collateral paid	5,506	39,025	(25,316)
Total	71,030	90,051	51,666
Commodity derivative assets - current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	180,031	165,038	276,764
Commodity derivative liabilities	(37,600)	(55,262)	(71,259)
Cash collateral paid	5,506	39,025	(25,316)
Derivative Asset, Fair Value, Amount Offset Against Collateral Including Subject To Master Netting Arrangement	147,937	148,801	180,189
Commodity derivative assets - noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	6,554	1,441	8,141
Commodity derivative liabilities	(35)	(28)	(96)
Cash collateral paid	0	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral Including Subject To Master Netting Arrangement	6,519	1,413	8,045
Commodity derivative liabilities - current
Derivatives, Fair Value [Line Items]
Commodity derivative assets	9,558	10,158	12,625
Commodity derivative liabilities	(88,811)	(69,924)	(141,472)
Cash collateral paid	0	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral Including Before Subject To Master Netting Arrangement	79,253	59,766	128,847
Commodity derivative liabilities - noncurrent
Derivatives, Fair Value [Line Items]
Commodity derivative assets	34	28	35
Commodity derivative liabilities	(4,207)	(425)	(7,756)
Cash collateral paid	0	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral Including Before Subject To Master Netting Arrangement	$ 4,173	$ 397	$ 7,721