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Borrowed Funds - Short-term Borrowings, Long-term borrowings and Repurchase Agreements (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Borrowed funds |  |
FHLB maximum borrowing capacity | $ 697,000,000 |
FHLB, remaining borrowing capacity | 683,900,000 |
FHLB, deposit letters of credit | 11,900,000 |
FHLB, credit enhancement recourse obligations | 1,200,000 |
Short-term Borrowings and Repurchase Agreements |  |
Long-term notes from the FHLB | 0 | $ 0
Short-term Borrowings from FHLB |  |
Short-term Borrowings and Repurchase Agreements |  |
Balance at end of period | 0 | 0
Average balance during the period | 44,000 | 17,542,000
Maximum month-end balance | $ 0 | $ 0
Weighted-average rate during the period | 9.14% | 5.07%
Weighted-average rate at end of period | 0.00% | 0.00%
Federal Funds Purchased |  |
Short-term Borrowings and Repurchase Agreements |  |
Balance at end of period | $ 0 | $ 0
Investment Securities |  |
Short-term Borrowings and Repurchase Agreements |  |
Investment securities held as collateral | 3,900,000 | 4,900,000
Repurchase Agreements |  |
Short-term Borrowings and Repurchase Agreements |  |
Balance at end of period | 3,810,000 | 4,821,000
Average balance during the period | 2,951,000 | 5,662,000
Maximum month-end balance | $ 3,810,000 | $ 10,041,000
Weighted-average rate during the period | 0.01% | 0.02%
Weighted-average rate at end of period | 0.01% | 0.01%

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- Definition Federal Home Loan Bank, Advances General Debt Obligations, Related To Commitments Through Mortgage Partnership Finance Program + References No definition available. + Details
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