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Investments - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Jun. 30, 2024
Investments, All Other Investments [Abstract]          
Gross proceeds from matured or redeemed securities $ 403,100,000 $ 344,200,000 $ 706,500,000 $ 726,000,000.0  
Equity securities, realized gain (loss) 300,000 0 300,000 0  
Equity securities, at cost 41,927,000   41,927,000   $ 37,806,000
Equity securities, impairment loss 0 14,100,000 $ 3,000,000.0 14,100,000  
Fair value, liability, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income     Other income, net    
Equity securities, upward adjustment 2,400,000 0 $ 2,400,000 0  
Equity securities, downward adjustment   $ 0   $ 0  
Fixed term deposit $ 22,028,000   $ 22,028,000   $ 35,203,000