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Loans and Allowance for Credit Losses (Rollforward of TDRs) (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | $ 11,781 | $ 16,624
Disbursements (Payments) | (2,053) | (161)
Charge offs | (3) | (379)
Payoffs | (197) | (3,056)
TDR ending balance | 9,528 | 13,028
TDR, Related Allowance | 414 | 421
Impaired Nonaccrual Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 3,118 | 3,298
Disbursements (Payments) | (1,355) | (44)
Charge offs | (3) |
Reclassifications/Transfer In/(Out) |  | 154
TDR ending balance | 1,760 | 3,408
TDR, Related Allowance | 159 | 421
Impaired Nonaccrual Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Reclassifications/Transfer In/(Out) |  | 154
TDR ending balance |  | 154
Impaired Nonaccrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance |  | 83
TDR ending balance |  | 83
Impaired Nonaccrual Loans [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 320 | 337
Disbursements (Payments) | (9) | (4)
TDR ending balance | 311 | 333
TDR, Related Allowance | 7 | 29
Impaired Nonaccrual Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 2,798 | 2,878
Disbursements (Payments) | (1,346) | (40)
Charge offs | (3) |
TDR ending balance | 1,449 | 2,838
TDR, Related Allowance | 152 | 392
Impaired Accruing Restructured Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 8,663 | 13,326
Disbursements (Payments) | (698) | (117)
Charge offs |  | (379)
Reclassifications/Transfer In/(Out) |  | (154)
Payoffs | (197) | (3,056)
TDR ending balance | 7,768 | 9,620
TDR, Related Allowance | 255 |
Impaired Accruing Restructured Loans [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 4,454 | 4,536
Disbursements (Payments) | (45) | (42)
Reclassifications/Transfer In/(Out) |  | (154)
Payoffs | (197) | (237)
TDR ending balance | 4,212 | 4,103
TDR, Related Allowance | 230 |
Impaired Accruing Restructured Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 4,158 | 4,818
Disbursements (Payments) | (647) | (69)
Payoffs |  | (219)
TDR ending balance | 3,511 | 4,530
TDR, Related Allowance | 25 |
Impaired Accruing Restructured Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
TDR beginning balance | 51 | 3,972
Disbursements (Payments) | (6) | (6)
Charge offs |  | (379)
Payoffs |  | (2,600)
TDR ending balance | $ 45 | $ 987

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