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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

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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