Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Allowance for loan losses	$ 3,259	$ 3,413
OREO	0	9
Accrued pension and post-retirement	887	948
Unrealized loss on securities available for sale	457	0
Unrealized loss on derivative instruments	544	1,865
Unrealized loss on securities transferred from available for sale to held to maturity	23	35
Restricted stock grants	308	270
Core deposit intangible	29	24
Investment in flow through entities	79	82
Other assets	35	87
Total deferred tax asset	5,621	6,733
Net deferred loan costs	(2,055)	(1,894)
Depreciation	(2,334)	(2,013)
Unrealized gain on securities available for sale	0	(1,332)
Goodwill	(214)	(161)
Mortgage servicing rights	(561)	(411)
Unrealized gain on derivative instruments	(544)	(554)
Prepaid expense	(295)	(195)
Total deferred tax liability	(6,003)	(6,560)
Net deferred tax asset (liability)	$ (382)
Net deferred tax asset (liability)		$ 173