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Borrowings - Additional Information (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Jun. 30, 2022
Mortgage-Backed Securities    
Debt Instrument [Line Items]    
Federal Home Loan Bank, advances, general debt obligations, disclosures, collateral pledged   $ 178.0
Investment in Federal Home Loan Bank Stock    
Debt Instrument [Line Items]    
Federal Home Loan Bank, advances, general debt obligations, disclosures, collateral pledged $ 4,600.0 $ 3,580.0