Income Taxes (Schedule of tax effects of temporary differences of the deferred tax assets and deferred tax liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for loan losses	$ 3,141	$ 1,608
Deferred expenses	47	58
Deferred compensation	1,271	879
Unrecognized pension liability	1,272	1,038
Postretirement liability	954	932
Deferred loss on OREO	83	187
Deferred loan fees	158
Unrealized loss on securities		53
State tax NOLs	990	870
Other	324	201
Gross deferred tax assets	8,240	5,826
Deferred tax liabilities:
Prepaid expenses	(217)	(209)
Prepaid pension	(1,276)	(1,248)
Deferred loan fees		(207)
Depreciation and amortization	(375)	(104)
Unrealized gain on securities	(264)
Mortgage servicing rights	(645)	(601)
Gross deferred tax liabilities	(2,777)	(2,369)
Net deferred tax asset	5,463	3,457
Deferred tax valuation allowance	(1,760)	(1,202)
Deferred tax assets, net of allowance	$ 3,703	$ 2,255