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Loans (Summary Of Impaired Loans) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded [1] $ 1,554 $ 2,332
Recorded Investment, With an allowance recorded [1] 523 746
Recorded Investment [1] 2,077 3,078
Unpaid Principal Balance, With no related allowance recorded [1] 2,401 3,276
Unpaid Principal Balance, With an allowance recorded [1] 523 746
Unpaid Principal Balance [1] 2,924 4,022
Related Allowance 183 206
Average Recorded Investment, With no related allowance recorded 2,086 1,848
Average Recorded Investment, With an allowance recorded 680 4,394
Average Recorded Investment 2,766 6,242
Interest Income Recognized, With no related allowance recorded  
Interest Income Recognized, With an allowance recorded
Interest Income Recognized
Commercial Business [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded [1] 221 319
Recorded Investment, With an allowance recorded [1] 504 725
Unpaid Principal Balance, With no related allowance recorded [1] 292 487
Unpaid Principal Balance, With an allowance recorded [1] 504 725
Related Allowance 181 205
Average Recorded Investment, With no related allowance recorded 356 1,156
Average Recorded Investment, With an allowance recorded 660 2,458
Interest Income Recognized, With no related allowance recorded  
Interest Income Recognized, With an allowance recorded
Commercial Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded [1] 1,333 2,013
Recorded Investment, With an allowance recorded [1] 19 21
Unpaid Principal Balance, With no related allowance recorded [1] 2,109 2,789
Unpaid Principal Balance, With an allowance recorded [1] 19 21
Related Allowance 2 1
Average Recorded Investment, With no related allowance recorded 1,730 692
Average Recorded Investment, With an allowance recorded 20 1,936
Interest Income Recognized, With no related allowance recorded  
Interest Income Recognized, With an allowance recorded
[1] Difference between recorded investment and unpaid principal balance represents partial charge-offs.