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Merger - Schedule of Merger-Related One-Time and Conversion Costs (Details) - Bank of Marin - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Restructuring Cost and Reserve [Line Items] |  |
Total merger-related one-time and conversion costs | $ 547 | $ 0
Personnel and severance |  |
Restructuring Cost and Reserve [Line Items] |  |
Total merger-related one-time and conversion costs | 335 | 0
Professional services |  |
Restructuring Cost and Reserve [Line Items] |  |
Total merger-related one-time and conversion costs | 67 | 0
Data processing |  |
Restructuring Cost and Reserve [Line Items] |  |
Total merger-related one-time and conversion costs | 48 | 0
Other expense |  |
Restructuring Cost and Reserve [Line Items] |  |
Total merger-related one-time and conversion costs | $ 97 | $ 0

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- Definition The amount of cash paid during the reporting period for charges associated with the mergers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585 + Details
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