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Fair Value Of Assets And Liabilities (Schedule Of Level 3 Assets Measured At Fair Value On Nonrecurring Basis) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Impaired loans $ 570 $ 1,846
Foreclosed real estate 1,630 2,003
Mortgage servicing rights 209 0
Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Impaired loans 570 1,846
Foreclosed real estate 1,630 $ 2,003
Mortgage servicing rights $ 209  
Impaired Loans [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Valuation Techniques [1] Appraisal  
Unobservable Input [2] Appraisal adjustments  
Impaired Loans [Member] | Minimum [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Appraisal adjustments 15.00% 15.00%
Impaired Loans [Member] | Maximum [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Appraisal adjustments 25.00% 25.00%
Impaired Loans [Member] | Weighted Average [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Appraisal adjustments 24.00% 16.00%
Foreclosed Real Estate [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Valuation Techniques [1] Appraisal  
Unobservable Input [2] Appraisal adjustments  
Foreclosed Real Estate [Member] | Minimum [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Appraisal adjustments 9.00% 7.00%
Foreclosed Real Estate [Member] | Maximum [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Appraisal adjustments 19.00% 38.00%
Foreclosed Real Estate [Member] | Weighted Average [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Appraisal adjustments 19.00% 34.00%
Mortgage Servicing Rights [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Valuation Techniques Multiple of annual service fee  
Unobservable Input Estimated prepayment speed based on rate and term  
Mortgage Servicing Rights [Member] | Minimum [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Estimated prepayment speed based on rate and term 231.00%  
Mortgage Servicing Rights [Member] | Maximum [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Estimated prepayment speed based on rate and term 405.00%  
Mortgage Servicing Rights [Member] | Weighted Average [Member] | Nonrecurring [Member] | (Level 3) Significant Other Unobservable Inputs [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Estimated prepayment speed based on rate and term 378.00%  
[1] Fair value is generally determined through independent appraisals, which generally include various level 3 inputs that are not identifiable.
[2] Appraisals may be adjusted downward by the Corporation's management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.