Property, Plant and Equipment & Natural Gas Properties - Schedule of Natural Gas Properties (Details) - Unproved properties $ in Thousands	6 Months Ended
Dec. 31, 2025 USD ($)
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	$ 342,314
Capital expenditure	60,723
Restoration assets	60
Interest on finance lease liability and related depreciation of ROU assets capitalized	5,992
Disposal	(444)
Government grants	(120)
Effect of changes in foreign exchange rates	7,048
Ending balance	415,574
EP 161
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	25,091
Capital expenditure	525
Restoration assets	0
Interest on finance lease liability and related depreciation of ROU assets capitalized	0
Disposal	0
Government grants	(66)
Effect of changes in foreign exchange rates	421
Ending balance	25,971
EP 136
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	45,483
Capital expenditure	104
Restoration assets	0
Interest on finance lease liability and related depreciation of ROU assets capitalized	0
Disposal	(444)
Government grants	(54)
Effect of changes in foreign exchange rates	878
Ending balance	45,967
EP 76, 98 and 117
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	271,740
Capital expenditure	60,094
Restoration assets	60
Interest on finance lease liability and related depreciation of ROU assets capitalized	5,992
Disposal	0
Government grants	0
Effect of changes in foreign exchange rates	5,749
Ending balance	$ 343,635

Oil and Gas, Successful Efforts Method, Property and Equipment, Decrease Through Disposals

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- Definition

Oil and Gas, Successful Efforts Method, Property and Equipment, Increase (Decrease) In Foreign Exchange Rates

+ References

No definition available.

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- Definition

Oil and Gas, Successful Efforts Method, Property and Equipment, Increase (Decrease) Through Government Grants

+ References

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- Definition

Oil and Gas, Successful Efforts Method, Property and Equipment, Interest On Finance Lease Liability And Related Depreciation of ROU Assets Capitalized

+ References

No definition available.

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- Definition

Oil and Gas, Successful Efforts Method, Property and Equipment, Restoration Assets

+ References

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- Definition

Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount, after accumulated depreciation, depletion, amortization, and impairment, of oil and gas properties accounted for under successful efforts method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 360
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478810/932-360-50-1

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