Income Taxes (Schedule of tax effects of temporary differences of the deferred tax assets and deferred tax liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Allowance for credit losses	$ 2,263	$ 2,145
Deferred expenses	18	28
Deferred compensation	1,652	1,493
Unrecognized pension liability	910	1,063
Postretirement liability	1,002	975
Unrealized loss on securities	6,932	7,494
Other	658	576
Gross deferred tax assets	13,435	13,774
Deferred tax liabilities:
Prepaid expenses	(515)	(467)
Prepaid pension	(1,222)	(1,304)
Deferred loan fees	(154)	(209)
Depreciation and amortization	(476)	(563)
Mortgage servicing rights	(534)	(650)
Gross deferred tax liabilities	(2,901)	(3,193)
Net deferred tax asset	10,534	10,581
Deferred tax valuation allowance	(598)	(450)
Deferred tax assets, net of allowance	$ 9,936	$ 10,131