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Business Combination (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Oct. 30, 2020 USD ($) item shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |
Cash payment |  | $ 54,836 | $ 0 | $ 0
Goodwill |  | $ 17,636 | $ 16,127 |
Increase in assets through acquisition | $ 982,700 |  |  |
New branches through acquisition | item | 4 |  |  |
Empire |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Voting interest acquired (as a percent) | 100.00% |  |  |
Total consideration paid | $ 87,541 |  |  |
Cash payment | $ 54,836 |  |  |
Shares | shares | 2,557,028 |  |  |
Goodwill | $ 1,509 |  |  |
Merger cost | $ 6,900 |  |  |
Empire | Core deposits |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Amortization period | 10 years |  |  |

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