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Borrowings - Additional Information (Details) - USD ($)
Jun. 30, 2024
Jun. 30, 2023
Federal Reserve Bank Term Funding Program ("BTFP")    
Debt Instrument [Line Items]    
Federal reserve bank advances agency mortgage-backed securities $ 113,500,000 $ 0
Investment in Federal Home Loan Bank Stock    
Debt Instrument [Line Items]    
Federal Home Loan Bank, advances, general debt obligations, disclosures, collateral pledged $ 4,380,000,000 4,600,000,000
Federal Home Loan Bank, advances, general debt obligations, amount of available, unused funds   $ 1,820,000,000