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Fair Value Of Financial Instruments (Narrative) (Details)
12 Months Ended
Jun. 30, 2025
USD ($)
Item
shares
Jun. 30, 2024
USD ($)
Item
shares
Mar. 31, 2025
USD ($)
Aug. 02, 2017
shares
Derivatives, Fair Value [Line Items]        
Outstanding foreign exchange contracts | Item 0 0    
Change in fair value $ 0 $ 0    
Transfers into or out of Level 3 0 0    
Accreted interest 5,033,000 7,214,000    
Nonrecurring [Member]        
Derivatives, Fair Value [Line Items]        
Liabilities measured at fair value 0      
Cell C [Member]        
Derivatives, Fair Value [Line Items]        
Investment amount owned $ 0.0 $ 0.0    
Equity method investment, percentage of ownership interest 0.00%      
Cell C [Member] | Marketability Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 15.00% 20.00%    
Cell C [Member] | Minority Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 17.00% 24.00%    
Cell C [Member] | Minimum [Member]        
Derivatives, Fair Value [Line Items]        
Increase decrease in weighted average cost of capital 1.00%      
Cell C [Member] | Maximum [Member]        
Derivatives, Fair Value [Line Items]        
Increase decrease in weighted average cost of capital (1.00%)      
Cell C [Member] | Class A [Member]        
Derivatives, Fair Value [Line Items]        
Investment shares owned | shares 75,000,000     75,000,000
Cell C [Member] | Class A [Member] | Marketability Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 15.00% 20.00%    
Cell C [Member] | Class A [Member] | Minority Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 17.00% 24.00%    
Mobikwik [Member]        
Derivatives, Fair Value [Line Items]        
Investment shares owned | shares 6,215,620 6,215,620    
Investment amount owned   $ 76,300,000 $ 22,100,000