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Acquisitions - Additional Information (Details) $ in Thousands |  |  | 87 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 10, 2020 USD ($) Branch Business | Oct. 15, 2018 USD ($) Branch shares | Oct. 15, 2018 USD ($) Acquisition Branch | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  |  | $ 58,563 | $ 58,383
Number of acquisitions | Acquisition |  |  | 5 |  |
First American International Corp. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  | $ 34,837 |  |  |
Business acquisition, stock value of acquirer |  | $ 69,602 |  |  |
Business acquisition, common shares issued | shares |  | 3,011,762 |  |  |
Goodwill |  | $ 28,443 | $ 28,443 |  |
Business Combination, Identifiable assets acquired |  | 849,962 | 849,962 |  |
Deposits |  | $ 629,703 | $ 629,703 |  |
First American International Corp. | New York |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches operated | Branch |  | 9 | 9 |  |
PGB | Subsequent Event |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration | $ 32,900 |  |  |  |
Business acquisition, date | Jan. 10, 2020 |  |  |  |
PGB | Illinois | Subsequent Event |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Identifiable assets acquired | $ 217,600 |  |  |  |
Deposits | $ 192,300 |  |  |  |
Number of acquisitions | Business | 1 |  |  |  |
Number of branches | Branch | 3 |  |  |  |

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