Federal Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Assets
Allowance for loan losses	$ 2,476	$ 3,766
Deferred compensation	676	986
Purchase accounting	16	23
Deferred loan fees and costs, net	99	160
Capital loss carryover	173	280
Other than temporary impairment of investments	124	260
Accumulated other comprehensive loss	1,603	2,171
Depreciation		45
Other	2,191	561
Deferred Tax Assets, Gross, Total	7,358	8,252
Valuation allowance	(297)	(467)
Total gross deferred tax assets	7,061	7,785
Deferred Tax Liabilities
Depreciation	162
Joint ventures and partnerships	28	36
Pension	1,068	1,886
Mortgage servicing rights		19
Total gross deferred tax liabilities	1,258	1,941
Net deferred tax asset	$ 5,803	$ 5,844