Property, Plant and Equipment - Net Changes in Capitalized Exploratory Well Costs (Details) - USD ($)	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	$ 72,055,000	$ 49,118,000
Additions pending the determination of proved reserves	43,091,000	28,452,000
Capitalized exploratory well costs charged to expense	0	(26,471,000)
Ending balance	$ 115,146,000	$ 51,099,000