Income Taxes (Schedule of tax effects of temporary differences of the deferred tax assets and deferred tax liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Allowance for loan losses	$ 2,145	$ 2,041
Deferred expenses	28	39
Deferred compensation	1,493	1,538
Unrecognized pension liability	1,063	1,037
Postretirement liability	975	920
Unrealized loss on securities	7,494	727
Other	576	431
Gross deferred tax assets	13,774	6,733
Deferred tax liabilities:
Prepaid expenses	(467)	(262)
Prepaid pension	(1,304)	(1,275)
Deferred loan fees	(209)	(154)
Depreciation and amortization	(563)	(525)
Mortgage servicing rights	(650)	(711)
Gross deferred tax liabilities	(3,193)	(2,927)
Net deferred tax asset	10,581	3,806
Deferred tax valuation allowance	(450)	(454)
Deferred tax assets, net of allowance	$ 10,131	$ 3,352