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Loans And The Allowance For Loan Losses (Data, At Class Level, Of Impaired Loans) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded $ 7,730 $ 7,756
Impaired Loans, Recorded Investment, With a related allowance recorded 11,820 7,385
Impaired Loans, Recorded Investment, Total 19,550 15,141
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded 8,179 8,370
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded 12,144 7,543
Impaired Loans, Unpaid Principal Balance, Total 20,323 15,913
Impaired Loans, Related Allowance 2,015 2,027
Impaired Loans, Average Recorded Investment, With no related allowance recorded 7,837 8,188
Impaired Loans, Average Recorded Investment, With a related allowance recorded 11,866 7,452
Impaired Loans, Average Recorded Investment, Total 19,703 15,640
Impaired Loans, Interest Income Foregone, With no related allowance recorded 81 250
Impaired Loans, Interest Income Foregone, With a related allowance recorded 90 320
Impaired Loans, Interest Income Foregone, Total 171 570
Impaired Loans, Interest Income Recognized, With no related allowance recorded 45 276
Impaired Loans, Interest Income Recognized, With a related allowance recorded 56 58
Impaired Loans, Interest Income Recognized, Total 101 334
Commercial And Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded 1,176 1,304
Impaired Loans, Recorded Investment, With a related allowance recorded 1,610 1,844
Impaired Loans, Recorded Investment, Total 2,786 3,148
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded 1,279 1,604
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded 1,853 1,913
Impaired Loans, Unpaid Principal Balance, Total 3,132 3,517
Impaired Loans, Related Allowance 253 492
Impaired Loans, Average Recorded Investment, With no related allowance recorded 1,183 1,455
Impaired Loans, Average Recorded Investment, With a related allowance recorded 1,654 1,898
Impaired Loans, Average Recorded Investment, Total 2,837 3,353
Impaired Loans, Interest Income Foregone, With no related allowance recorded 23 125
Impaired Loans, Interest Income Foregone, With a related allowance recorded 24 62
Impaired Loans, Interest Income Foregone, Total 47 187
Impaired Loans, Interest Income Recognized, With no related allowance recorded 5 51
Impaired Loans, Interest Income Recognized, With a related allowance recorded 2 53
Impaired Loans, Interest Income Recognized, Total 7 104
Consumer And Other Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded
Impaired Loans, Recorded Investment, With a related allowance recorded 36 43
Impaired Loans, Recorded Investment, Total 36 43
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded 62 68
Impaired Loans, Unpaid Principal Balance, Total 62 68
Impaired Loans, Related Allowance 36 43
Impaired Loans, Average Recorded Investment, With no related allowance recorded
Impaired Loans, Average Recorded Investment, With a related allowance recorded 37 45
Impaired Loans, Average Recorded Investment, Total 37 45
Impaired Loans, Interest Income Foregone, With no related allowance recorded
Impaired Loans, Interest Income Foregone, With a related allowance recorded 1 3
Impaired Loans, Interest Income Foregone, Total 1 3
Impaired Loans, Interest Income Recognized, With no related allowance recorded
Impaired Loans, Interest Income Recognized, With a related allowance recorded 1 3
Impaired Loans, Interest Income Recognized, Total 1 3
Total Real Estate Loans [Member] | Residential Real Estate [Member] | Mortgages [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded 2,491 2,513
Impaired Loans, Recorded Investment, With a related allowance recorded 70 71
Impaired Loans, Recorded Investment, Total 2,561 2,584
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded 2,697 2,720
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded 72 72
Impaired Loans, Unpaid Principal Balance, Total 2,769 2,792
Impaired Loans, Related Allowance 1 1
Impaired Loans, Average Recorded Investment, With no related allowance recorded 2,493 2,542
Impaired Loans, Average Recorded Investment, With a related allowance recorded 70 72
Impaired Loans, Average Recorded Investment, Total 2,563 2,614
Impaired Loans, Interest Income Foregone, With no related allowance recorded 9 39
Impaired Loans, Interest Income Foregone, With a related allowance recorded 1 2
Impaired Loans, Interest Income Foregone, Total 10 41
Impaired Loans, Interest Income Recognized, With no related allowance recorded 17 78
Impaired Loans, Interest Income Recognized, With a related allowance recorded   1
Impaired Loans, Interest Income Recognized, Total 17 79
Total Real Estate Loans [Member] | Residential Real Estate [Member] | Construction [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded
Impaired Loans, Recorded Investment, With a related allowance recorded
Impaired Loans, Recorded Investment, Total
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded
Impaired Loans, Unpaid Principal Balance, Total
Impaired Loans, Related Allowance
Impaired Loans, Average Recorded Investment, With no related allowance recorded
Impaired Loans, Average Recorded Investment, With a related allowance recorded
Impaired Loans, Average Recorded Investment, Total
Impaired Loans, Interest Income Foregone, With no related allowance recorded
Impaired Loans, Interest Income Foregone, With a related allowance recorded
Impaired Loans, Interest Income Foregone, Total
Impaired Loans, Interest Income Recognized, With no related allowance recorded
Impaired Loans, Interest Income Recognized, With a related allowance recorded
Impaired Loans, Interest Income Recognized, Total
Total Real Estate Loans [Member] | Commercial Real Estate [Member] | Mortgages [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded 2,452 2,123
Impaired Loans, Recorded Investment, With a related allowance recorded 5,843 1,054
Impaired Loans, Recorded Investment, Total 8,295 3,177
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded 2,506 2,168
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded 5,871 1,083
Impaired Loans, Unpaid Principal Balance, Total 8,377 3,251
Impaired Loans, Related Allowance 541 296
Impaired Loans, Average Recorded Investment, With no related allowance recorded 2,534 2,181
Impaired Loans, Average Recorded Investment, With a related allowance recorded 5,843 1,062
Impaired Loans, Average Recorded Investment, Total 8,377 3,243
Impaired Loans, Interest Income Foregone, With no related allowance recorded 34 33
Impaired Loans, Interest Income Foregone, With a related allowance recorded 13 50
Impaired Loans, Interest Income Foregone, Total 47 83
Impaired Loans, Interest Income Recognized, With no related allowance recorded 19 89
Impaired Loans, Interest Income Recognized, With a related allowance recorded 53  
Impaired Loans, Interest Income Recognized, Total 72 89
Total Real Estate Loans [Member] | Commercial Real Estate [Member] | Construction [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded   257
Impaired Loans, Recorded Investment, With a related allowance recorded 4,178 4,179
Impaired Loans, Recorded Investment, Total 4,178 4,436
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded   257
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded 4,201 4,201
Impaired Loans, Unpaid Principal Balance, Total 4,201 4,458
Impaired Loans, Related Allowance 1,175 1,175
Impaired Loans, Average Recorded Investment, With no related allowance recorded   404
Impaired Loans, Average Recorded Investment, With a related allowance recorded 4,179 4,180
Impaired Loans, Average Recorded Investment, Total 4,179 4,584
Impaired Loans, Interest Income Foregone, With no related allowance recorded   2
Impaired Loans, Interest Income Foregone, With a related allowance recorded 50 194
Impaired Loans, Interest Income Foregone, Total 50 196
Impaired Loans, Interest Income Recognized, With no related allowance recorded   28
Impaired Loans, Interest Income Recognized, With a related allowance recorded
Impaired Loans, Interest Income Recognized, Total   28
Total Real Estate Loans [Member] | Home Equities [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans, Recorded Investment, With no related allowance recorded 1,611 1,559
Impaired Loans, Recorded Investment, With a related allowance recorded 83 194
Impaired Loans, Recorded Investment, Total 1,694 1,753
Impaired Loans, Unpaid Principal Balance, With no related allowance recorded 1,697 1,621
Impaired Loans, Unpaid Principal Balance, With a related allowance recorded 85 206
Impaired Loans, Unpaid Principal Balance, Total 1,782 1,827
Impaired Loans, Related Allowance 9 20
Impaired Loans, Average Recorded Investment, With no related allowance recorded 1,627 1,606
Impaired Loans, Average Recorded Investment, With a related allowance recorded 83 195
Impaired Loans, Average Recorded Investment, Total 1,710 1,801
Impaired Loans, Interest Income Foregone, With no related allowance recorded 15 51
Impaired Loans, Interest Income Foregone, With a related allowance recorded 1 9
Impaired Loans, Interest Income Foregone, Total 16 60
Impaired Loans, Interest Income Recognized, With no related allowance recorded 4 30
Impaired Loans, Interest Income Recognized, With a related allowance recorded 1
Impaired Loans, Interest Income Recognized, Total $ 4 $ 31