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FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS - Federal Home Loan Bank Advances (Details) - USD ($) | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2027 | Sep. 30, 2025 | Jun. 30, 2019 | Jun. 30, 2023 | Dec. 31, 2022
Summary of Federal Home Loan Bank advances |  |  |  |  |
Federal Home Loan Bank (“FHLB”) |  |  |  | $ 122,530,000 | $ 142,530,000
Long-term debt, gross |  |  |  | 189,887,000 | 214,939,000
Banks available and unused portion of borrowing agreement |  |  |  | 294,400,000 | 256,773,000
Maximum month-end amounts outstanding |  |  |  | 217,530,000 | 157,530,000
Senior Notes - Variable Rate Due June 2031 | Revolving Credit Facility |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Maximum borrowing capacity |  |  |  | 5,000,000 |
Federal Home Loan Bank advances |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
FHLB Advances, Maturity 2023 |  |  |  | 82,000,000 | 117,000,000
FHLB Advances, Maturity 2024 |  |  |  | 20,530,000 | 20,530,000
FHLB Advances, Maturity 2025 |  |  |  | 5,000,000 | 5,000,000
FHLB Advances, Maturity 2028 |  |  |  | 15,000,000 |
Federal Home Loan Bank (“FHLB”) |  |  |  | 122,530,000 | 142,530,000
FHLB advances |  |  |  | $ 1,040,484,000 | $ 984,878,000
Weighted-average interest rate (as a percent) |  |  |  | 4.58% | 4.09%
Federal Home Loan Bank advances | Minimum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Range of Stated Rates, 2023 (as a percent) |  |  |  | 1.43% | 1.43%
Range of Stated Rates, 2024 (as a percent) |  |  |  | 0.00% | 0.00%
Range of Stated Rates, 2025 (as a percent) |  |  |  | 1.45% | 1.45%
Range of Stated Rates , 2028 (as a percent) |  |  |  | 3.57% |
Federal Home Loan Bank advances | Maximum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Range of Stated Rates, 2023 (as a percent) |  |  |  | 5.29% | 4.31%
Range of Stated Rates, 2024 (as a percent) |  |  |  | 1.45% | 1.45%
Range of Stated Rates, 2025 (as a percent) |  |  |  | 1.45% | 1.45%
Range of Stated Rates , 2028 (as a percent) |  |  |  | 3.59% |
Senior Notes |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Long-term debt, gross |  |  |  | $ 67,357,000 | $ 72,409,000
Unamortized debt issuance costs |  |  |  | (726,000) | (841,000)
Senior Notes | Senior Notes, Due 2034 |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Long-term debt, gross |  |  |  | $ 18,083,000 | $ 23,250,000
Senior Notes | Senior Notes, Due 2034 | Prime Rate |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  | 0.75% |  |
Senior Notes | Senior Notes, Due 2034 | Minimum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Stated interest rate (as a percent) |  |  | 3.00% | 6.75% | 3.00%
Senior Notes | Senior Notes, Due 2034 | Maximum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 7.50% | 6.75%
Subordinated Notes |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Long-term debt, gross |  |  |  | $ 50,000,000 | $ 50,000,000
Subordinated Notes | Subordinated Notes, Due 2030 |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Long-term debt, gross |  |  |  | $ 15,000,000 | $ 15,000,000
Stated interest rate (as a percent) |  |  |  | 6.00% |
Debt instrument, term |  |  |  | 5 years |
Subordinated Notes | Subordinated Notes, Due 2030 | Secured Overnight Financing Rate (SOFR) | Forecast |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Basis spread on variable rate (as a percent) |  | 5.91% |  |  |
Subordinated Notes | Subordinated Notes, Due 2030 | Minimum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 6.00% | 6.00%
Subordinated Notes | Subordinated Notes, Due 2030 | Maximum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 6.00% | 6.00%
Subordinated Notes | Subordinated Notes, Due 2032 |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Long-term debt, gross |  |  |  | $ 35,000,000 | $ 35,000,000
Stated interest rate (as a percent) |  |  |  | 4.75% |
Debt instrument, term |  |  |  | 5 years |
Subordinated Notes | Subordinated Notes, Due 2032 | Secured Overnight Financing Rate (SOFR) | Forecast |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Basis spread on variable rate (as a percent) | 3.29% |  |  |  |
Subordinated Notes | Subordinated Notes, Due 2032 | Minimum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 4.75% | 4.75%
Subordinated Notes | Subordinated Notes, Due 2032 | Maximum |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 4.75% | 4.75%
Federal Home Loan Bank Advances |  |  |  |  |
Summary of Federal Home Loan Bank advances |  |  |  |  |
FHLB, term notes |  |  |  | $ 15,000 |

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