Equity-Accounted Investments And Other Long-Term Assets (Summary Of Other Long-Term Asset) (Details) - USD ($)	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2022
Schedule Of Equity And Held To Maturity Investments [Line Items]
Total equity investments	$ 76,297,000	$ 76,297,000
Policy holder assets under investment contracts (Note 11)	216,000	257,000
Reinsurance assets under insurance contracts (Note 11)	1,469,000	1,040,000
Total other long-term assets	77,982,000	77,594,000
Mobikwik [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Total equity investments	$ 76,297,000	$ 76,297,000
Equity-accounted investments, ownership percentage	10.00%	10.00%
Cell C [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Total equity investments	$ 0	$ 0
Equity-accounted investments, ownership percentage	5.00%	5.00%	15.00%
CPS [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Total equity investments	$ 0	$ 0
Equity-accounted investments, ownership percentage	87.50%	87.50%