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Organization and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
6 Months Ended
Dec. 31, 2024
Jun. 30, 2024
Cash and Cash Equivalents [Line Items]    
Securities purchased under agreements to resell $ 25.1 $ 0.0
Term of interest bearing deposits 3 years  
Interest-bearing deposits in other depository institutions    
Cash and Cash Equivalents [Line Items]    
Cash $ 84.5 7.7
Deposits are held in various commercial banks    
Cash and Cash Equivalents [Line Items]    
Cash $ 1.7 $ 2.3