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Loans and Allowance for loan losses (Effect On Loan Loss Provision, Changes In Methodology In Prior Periods) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses | $ 282 | $ 55
Calculated Provision Based On Prior Methodology [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | (990)
Difference [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | 1,045
Commercial [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses | 240 | 334
Commercial [Member] | Calculated Provision Based On Prior Methodology [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | 234
Commercial [Member] | Difference [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | 100
Commercial Real Estate [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses | (501) | (260)
Commercial Real Estate [Member] | Calculated Provision Based On Prior Methodology [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | (1,006)
Commercial Real Estate [Member] | Difference [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | 746
Consumer [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses | 464 | (83)
Consumer [Member] | Calculated Provision Based On Prior Methodology [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | (259)
Consumer [Member] | Difference [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | 176
Residential [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses | $ 79 | 64
Residential [Member] | Calculated Provision Based On Prior Methodology [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | 41
Residential [Member] | Difference [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Provision for loan losses |  | $ 23

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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 + Details
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