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Organization and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
6 Months Ended
Dec. 31, 2021
Jun. 30, 2021
Cash and Cash Equivalents [Line Items]    
Term of interest bearing deposits 7 years  
Interest-bearing deposits in other depository institutions    
Cash and Cash Equivalents [Line Items]    
Cash $ 148.8 $ 83.2
Deposits are held in various commercial banks    
Cash and Cash Equivalents [Line Items]    
Cash $ 1.8 $ 1.8