Property, Plant and Equipment & Natural Gas Properties - Schedule of Natural Gas Properties (Details) - Unproved properties $ in Thousands	3 Months Ended
	Sep. 30, 2025 USD ($)
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	$ 342,314
Capital expenditure	31,571
Restoration assets	60
Interest on finance lease liability and related depreciation of ROU assets capitalized	2,988
Disposal	(444)
Effect of changes in foreign exchange rates	2,313
Ending balance	378,802
EP 161
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	25,091
Capital expenditure	274
Restoration assets	0
Interest on finance lease liability and related depreciation of ROU assets capitalized	0
Disposal	0
Effect of changes in foreign exchange rates	137
Ending balance	25,502
EP 136
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	45,483
Capital expenditure	33
Restoration assets	0
Interest on finance lease liability and related depreciation of ROU assets capitalized	0
Disposal	(444)
Effect of changes in foreign exchange rates	379
Ending balance	45,451
EP 76, 98 and 117
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward]
Beginning balance	271,740
Capital expenditure	31,264
Restoration assets	60
Interest on finance lease liability and related depreciation of ROU assets capitalized	2,988
Disposal	0
Effect of changes in foreign exchange rates	1,797
Ending balance	$ 307,849