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v3.23.3

Borrowings (Additional Information) (Details) - USD ($) $ in Millions | 6 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Sep. 30, 2023
Debt Instrument [Line Items] |  |
Unpledged AFS securities |  | $ 24.9
Home Loan Bank |  |
Debt Instrument [Line Items] |  |
Subordinated Borrowing, Interest Rate | 5.00% | 4.87%
Subordinated Debt |  | $ 870.0
Other Short-Term Borrowings | $ 800.0 | 250.0
Secured and unused capacity |  | 4,700.0
Bank Term Funding Program |  |
Debt Instrument [Line Items] |  |
Secured unused borrowing capacity |  | 1,200.0
Unsecured Lines of Credit |  | 300.0
Bank Term Funding Program | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Unpledged AFS securities |  | $ 260.0

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