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Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Line Items] |  |  |
Goodwill | $ 53,777 | $ 53,777 |
Core deposit intangibles | 1,183 | 1,878 |
Intangible assets, accumulated amortization | 2,569 | 1,874 |
Amortization of core deposit intangibles | 695 | $ 695 | $ 455
Folsom Lake Bank |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 13,466 |  |
Sierra Vista Bank |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 10,394 |  |
Visalia Community Bank |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 6,340 |  |
Service 1st Bank |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 14,643 |  |
Bank of Madera County |  |  |
Goodwill [Line Items] |  |  |
Goodwill | $ 8,934 |  |
Core deposits |  |  |
Goodwill [Line Items] |  |  |
Acquired finite-lived intangible assets useful life | 2 years |  |
Core deposits | Folsom Lake Bank |  |  |
Goodwill [Line Items] |  |  |
Acquired finite-lived intangible assets | $ 1,879 |  |
Core deposits | Sierra Vista Bank |  |  |
Goodwill [Line Items] |  |  |
Acquired finite-lived intangible assets | 508 |  |
Core deposits | Visalia Community Bank |  |  |
Goodwill [Line Items] |  |  |
Acquired finite-lived intangible assets | $ 1,365 |  |
Minimum | Core deposits |  |  |
Goodwill [Line Items] |  |  |
Estimated useful life of intangible asset | 5 years |  |
Maximum | Core deposits |  |  |
Goodwill [Line Items] |  |  |
Estimated useful life of intangible asset | 10 years |  |

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