Income Taxes, Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets [Abstract]
Allowance for credit losses	$ 5,246	$ 4,580
Deferred compensation	64	82
Retirement compensation	1,617	1,635
Stock option compensation	453	379
Postretirement benefits	0	107
Current state franchise taxes	657	490
Non-accrual interest	333	416
Sale-leaseback	0	2
Lease liability	1,349	1,590
Investment securities unrealized loss	14,178	19,419
Other	281	392
Deferred tax assets	24,178	29,092
Deferred tax liabilities [Abstract]
Fixed assets depreciation	970	1,183
FHLB dividends	184	184
Tax credit - loss on pass-through	489	422
Deferred loan costs	940	1,024
Mortgage servicing rights	383	378
Right of Use Asset	1,204	1,450
Postretirement benefits	21	0
Other	393	276
Total deferred tax liabilities	4,584	4,917
Net deferred tax assets (see Note 7)	$ 19,594	$ 24,175