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Benefit Plans - Salary Continuation Plan (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of salary paid upon retirement | 25.00% |
Period before ratable vesting begins | 5 years |
Age ratable vesting ends | 65 years |
Liability under the Salary Continuation Plan | $ 2.5 | $ 1.0
Bank of Napa, N.A. (Napa) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Liability under the Salary Continuation Plan | $ 1.2 |

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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Details
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