Fair Value of Assets and Liabilities (Schedule Of Assets Measured At Fair Value On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	$ 1,081	$ 769
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	8,683	1,331
Mortgage servicing rights	1,081	769
(Level 1) Quoted Prices In Active Markets For Identical Assets [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Mortgage servicing rights	0	0
(Level 2) Significant Other Observable Inputs [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Mortgage servicing rights	0	0
(Level 3) Significant Other Unobservable Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	8,683	1,331
(Level 3) Significant Other Unobservable Inputs [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	8,683	1,331
Mortgage servicing rights	$ 1,081	$ 769