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Allowance For Credit Losses (Impaired Loans By Loan Portfolio) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded $ 6,732 $ 4,714
Unpaid Principal Balance, With no related allowance recorded 7,237 7,712
Average Recorded Investment, With no related allowance recorded 5,407 5,881
Interest Income Recognized, With no related allowance recorded 4 96
Recorded Investment, with allowance recorded 1,872 307
Unpaid Principal Balance, With allowance recorded 4,539 318
Related Allowance 334 114
Average Recorded Investment, With allowance recorded 1,262 1,010
Recorded Investment, Total 8,604 5,021
Unpaid Principal Balance, Total 11,776 8,030
Average Recorded Investment, Total 6,669 6,891
Interest Income Recognized, Total 4 96
Residential Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 653 1,620
Unpaid Principal Balance, With no related allowance recorded 680 1,919
Average Recorded Investment, With no related allowance recorded 1,134 1,883
Interest Income Recognized, With no related allowance recorded   5
Recorded Investment, with allowance recorded 1,107  
Unpaid Principal Balance, With allowance recorded 1,368  
Related Allowance 143  
Average Recorded Investment, With allowance recorded 605 105
Recorded Investment, Total 1,760 1,620
Unpaid Principal Balance, Total 2,048 1,919
Average Recorded Investment, Total 1,739 1,988
Interest Income Recognized, Total   5
Acquired Residential Mortgage With Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 11  
Unpaid Principal Balance, With no related allowance recorded 11  
Average Recorded Investment, With no related allowance recorded 2  
Recorded Investment, Total 11  
Unpaid Principal Balance, Total 11  
Average Recorded Investment, Total 2  
Commercial Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 2,919 1,181
Unpaid Principal Balance, With no related allowance recorded 3,330 1,461
Average Recorded Investment, With no related allowance recorded 2,265 2,501
Interest Income Recognized, With no related allowance recorded   85
Average Recorded Investment, With allowance recorded   121
Recorded Investment, Total 2,919 1,181
Unpaid Principal Balance, Total 3,330 1,461
Average Recorded Investment, Total 2,265 2,622
Interest Income Recognized, Total   85
Acquired Commercial Mortgage With Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 1,674  
Unpaid Principal Balance, With no related allowance recorded 1,680  
Average Recorded Investment, With no related allowance recorded 335  
Recorded Investment, Total 1,674  
Unpaid Principal Balance, Total 1,680  
Average Recorded Investment, Total 335  
Commercial Term [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 22  
Unpaid Principal Balance, With no related allowance recorded 24  
Average Recorded Investment, With no related allowance recorded 19  
Recorded Investment, with allowance recorded 176 200
Unpaid Principal Balance, With allowance recorded 196 211
Related Allowance 97 110
Average Recorded Investment, With allowance recorded 185 200
Recorded Investment, Total 198 200
Unpaid Principal Balance, Total 220 211
Average Recorded Investment, Total 204 200
Commercial Construction [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 795 1,140
Unpaid Principal Balance, With no related allowance recorded 795 3,526
Average Recorded Investment, With no related allowance recorded 914 838
Recorded Investment, with allowance recorded 447  
Unpaid Principal Balance, With allowance recorded 2,833  
Related Allowance 89  
Average Recorded Investment, With allowance recorded 358 537
Recorded Investment, Total 1,242 1,140
Unpaid Principal Balance, Total 3,628 3,526
Average Recorded Investment, Total 1,272 1,375
Consumer: Home Equity [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 544 691
Unpaid Principal Balance, With no related allowance recorded 595 716
Average Recorded Investment, With no related allowance recorded 634 535
Interest Income Recognized, With no related allowance recorded 4 4
Average Recorded Investment, With allowance recorded   18
Recorded Investment, Total 544 691
Unpaid Principal Balance, Total 595 716
Average Recorded Investment, Total 634 553
Interest Income Recognized, Total 4 4
Consumer: Other [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, With no related allowance recorded 114 82
Unpaid Principal Balance, With no related allowance recorded 122 90
Average Recorded Investment, With no related allowance recorded 104 124
Interest Income Recognized, With no related allowance recorded   2
Recorded Investment, with allowance recorded 142 107
Unpaid Principal Balance, With allowance recorded 142 107
Related Allowance 5 4
Average Recorded Investment, With allowance recorded 114 29
Recorded Investment, Total 256 189
Unpaid Principal Balance, Total 264 197
Average Recorded Investment, Total $ 218 153
Interest Income Recognized, Total   $ 2