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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, 2018 USD ($) contract | Dec. 31, 2017 USD ($) contract | Dec. 31, 2016 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 29 | 54 | 50
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 38,898 | $ 8,130 | $ 7,663
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 42,457 | $ 8,175 | $ 7,705
Commercial And Industrial [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 12 | 12 | 10
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 35,688 | $ 1,787 | $ 1,623
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 39,224 | $ 1,787 | $ 1,623
Commercial Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 3 | 6 | 10
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 1,600 | $ 2,705 | $ 2,959
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 1,600 | $ 2,705 | $ 2,959
Small Business [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract |  | 9 | 3
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  | $ 369 | $ 188
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment |  | $ 369 | $ 188
Residential Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 5 | 10 | 8
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 1,048 | $ 1,284 | $ 1,808
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 1,071 | $ 1,326 | $ 1,850
Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 9 | 17 | 13
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 562 | $ 1,985 | $ 932
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment | $ 562 | $ 1,988 | $ 932
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract |  |  | 6
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  |  | $ 153
TROUBLED DEBT RESTRUCTURINGS: |  |  |
Post-Modification Outstanding Recorded Investment |  |  | $ 153

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