Fair Value Measurements (Fair Value Of Financial Assets Measured On Nonrecurring Basis) (Details) - FV determined through independent appraisals of the underlying collateral [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	$ 1,001	$ 980
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	297	458
(Level 3) Significant Unobservable Inputs [Member] | Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	1,001	980
(Level 3) Significant Unobservable Inputs [Member] | Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	$ 297	$ 458