Commitments and Contingencies - Schedule of Capital Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Jun. 30, 2026
Sweetpea
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	$ 24,117	$ 24,028
EP 161
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	6,099	6,024
Beetaloo Joint Venture
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	56,634	73,322
Midstream
Other Commitments [Line Items]
Committed at the reporting date but not recognized as liabilities, payable:	$ 6,995	$ 22,957