Derivatives Statements of financial performance and financial position (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Borrowing Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 0	$ 0
Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	18,199,000	21,700,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Other Assets [Member] | Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Other Assets [Member] | Loan Derivative [Member] | Individually Immaterial Counterparties [Member]
Derivative [Line Items]
Derivative, Notional Amount	18,199,000	21,700,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(1,069,000)	(1,508,000)
Other Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	18,199,000	21,700,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(1,069,000)	(1,508,000)
Other Liabilities [Member] | Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	18,199,000	21,700,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	1,069,000	1,508,000
Other Liabilities [Member] | Loan Derivative [Member] | Individually Immaterial Counterparties [Member]
Derivative [Line Items]
Derivative, Notional Amount	0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Other Liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	18,199,000	21,700,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 1,069,000	$ 1,508,000