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Borrowings - Long-term debt advances (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument
Total FHLB long-term debt	$ 137,266	$ 99,148
Less net fair value discount	(237)	(511)
Total long-term debt	$ 137,029	98,637
Long-term 4.37% fixed rate debt due March 2025
Debt Instrument
Fixed interest rate (as a percent)	4.37%
Total long-term debt		10,000
Long-term 4.40% fixed rate debt instrument due December 2025
Debt Instrument
Fixed interest rate (as a percent)	4.40%
Total long-term debt	$ 9,567	9,567
Long-term 4.36% fixed rate debt instrument due December 2025
Debt Instrument
Fixed interest rate (as a percent)	4.36%
Total long-term debt	$ 20,000	20,000
Long-term 4.78% fixed rate debt instrument due March 2026
Debt Instrument
Fixed interest rate (as a percent)	4.78%
Total long-term debt	$ 4,292	4,292
Long-term 4.20% fixed rate debt due March 2026
Debt Instrument
Fixed interest rate (as a percent)	4.20%
Total long-term debt	$ 15,000	15,000
Long-term 4.08% fixed rate debt instrument due May 2026
Debt Instrument
Fixed interest rate (as a percent)	4.08%
Total long-term debt	$ 5,000	5,000
Long-term 3.98% fixed rate debt instrument due August 2026
Debt Instrument
Fixed interest rate (as a percent)	3.98%
Total long-term debt	$ 12,047
Long-term 3.95% fixed rate debt instrument due October 2026
Debt Instrument
Fixed interest rate (as a percent)	3.95%
Total long-term debt	$ 15,284
Long-term 4.16% fixed rate debt instrument due June 2027
Debt Instrument
Fixed interest rate (as a percent)	4.16%
Total long-term debt	$ 5,224	5,224
Long-term 4.01% fixed rate debt instrument due July 2027
Debt Instrument
Fixed interest rate (as a percent)	4.01%
Total long-term debt	$ 21,773
Long-term 4.40% fixed rate debt instrument due August 2027
Debt Instrument
Fixed interest rate (as a percent)	4.40%
Total long-term debt	$ 6,462	6,461
Long-term 5.29% fixed rate debt instrument due October 2027
Debt Instrument
Fixed interest rate (as a percent)	5.29%
Total long-term debt	$ 2,954	3,941
Long-term 5.18% fixed rate debt instrument due October 2027
Debt Instrument
Fixed interest rate (as a percent)	5.18%
Total long-term debt	$ 5,475	5,475
Long-term 4.45% fixed rate debt instrument due March 2028
Debt Instrument
Fixed interest rate (as a percent)	4.45%
Total long-term debt	$ 14,188	$ 14,188

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- Definition

Represents the difference between the book value and fair market value of the Federal Home Loan Bank Advances and Federal Reserve Bank borrowings.

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