Income Taxes, Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets [Abstract]
Allowance for loan losses	$ 4,317	$ 4,838
Deferred compensation	91	101
Retirement compensation	1,559	1,456
Stock option compensation	311	256
Postretirement benefits	578	871
Current state franchise taxes	322	467
Non-accrual interest	291	484
Sale-leaseback	26	51
Lease liability	1,667	1,900
Investment securities unrealized loss	1,115	0
Other	246	252
Deferred tax assets	10,523	10,676
Deferred tax liabilities [Abstract]
Fixed assets depreciation	1,320	1,357
FHLB dividends	184	184
Tax credit - loss on pass-through	400	499
Deferred loan costs	1,010	823
Mortgage servicing rights	288	143
Investment securities unrealized gain	0	2,903
Right of Use Asset	1,519	1,748
Other	147	89
Total deferred tax liabilities	4,868	7,746
Net deferred tax assets (see Note 7)	$ 5,655	$ 2,930