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Modification which Occurred During the Period & Change in Recorded Investment(Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) contract | Dec. 31, 2015 USD ($) contract | Dec. 31, 2014 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 50 | 44 | 51
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 7,663 | $ 6,085 | $ 7,609
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 7,705 | $ 6,112 | $ 7,645
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 6 |  | 1
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 153 |  | $ 8
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 153 |  | $ 8
Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 13 | 8 | 11
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 932 | $ 694 | $ 923
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 932 | $ 694 | $ 926
Residential Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 8 | 8 | 9
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 1,808 | $ 843 | $ 1,535
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 1,850 | $ 870 | $ 1,568
Small Business [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 3 | 9 | 5
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 188 | $ 293 | $ 133
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 188 | $ 293 | $ 133
Commercial Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 10 | 6 | 13
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 2,959 | $ 2,941 | $ 4,329
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 2,959 | $ 2,941 | $ 4,329
Commercial And Industrial [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 10 | 13 | 12
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 1,623 | $ 1,314 | $ 681
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 1,623 | $ 1,314 | $ 681

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