Commitments and Contingencies - Schedule of Capital Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025
Sweetpea
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	$ 23,074	$ 23,115
EP 161
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	2,314	2,302
Beetaloo Joint Venture
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	75,779	75,630
Midstream
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	$ 11,960	$ 9,056