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Merger - Additional Information (Detail) - USD ($) $ in Thousands |  | 9 Months Ended
--- | --- | ---
Sep. 14, 2018 | Sep. 30, 2018
Business Combinations [Line Items] |  |
Goodwill |  | $ 49,221
Core deposit intangible |  | 7,518
Core deposit intangibles and other intangibles, amortization period | 10 years |
UCB [Member] |  |
Business Combinations [Line Items] |  |
Date of acquisition completion | Sep. 14, 2018 |
Acquisition cash paid | $ 12,675 |
Common shares issued to shareholders | 4,277,430 |
Stock and cash transaction aggregate consideration | $ 117,344 |
Goodwill | 49,221 |
Core deposit intangible | 7,518 | $ 7,518
Total assets of UCB prior to the merger | 538,875 |
Assets, loan | 298,319 |
Assets, Deposit | 481,832 |
Cash acquired | 156,472 |
Loans acquired | 298,319 |
Loans acquired with credit deterioration | 1,210 |
Deposits acquired | $ 475,900 |

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