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MERGERS AND ACQUISITIONS AND BRANCH CONSOLIDATIONS - Narrative (Details) $ / shares in Units, ft² in Thousands, $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 01, 2019 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) loanProductionOffice branchLocation | Dec. 31, 2019 USD ($) | Dec. 31, 2021 USD ($) | Oct. 31, 2019 ft² branchLocation | Apr. 30, 2019 $ / shares
Business Acquisition [Line Items] |  |  |  |  |  |  |
Closing stock price per share (in shares) | $ / shares |  |  |  |  |  |  | $ 20.74
Goodwill |  | $ 19,925 | $ 18,724 | $ 19,925 | $ 18,724 |  |
Unaudited pro forma net income |  |  |  | 20,900 |  |  |
Pro forma revenue |  |  |  | 102,500 |  |  |
Merger related expenses |  |  |  | 8,000 |  |  |
Number of bank branch locations | branchLocation |  |  | 6 |  |  |  |
Number of loan production offices | loanProductionOffice |  |  | 3 |  |  |  |
Consolidation of operations expenses |  | 988 | $ 1,600 |  |  |  |
Lease termination costs |  | 126 | $ 1,300 |  |  |  |
Fixed asset writedowns |  | 762 |  |  |  |  |
Severance and other |  | 100 |  |  |  |  |
Assets held for sale |  | $ 4,900 |  | 4,900 |  |  |
Pennsylvania Branch Locations |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of bank branch locations | branchLocation |  |  |  |  |  | 5 |
Square feet of excess back office space | ft² |  |  |  |  |  | 50 |
Investment Banking, Legal and Consulting Fees |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Merger related expenses |  |  |  | 2,000 |  |  |
Information Systems |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Merger related expenses |  |  |  | 2,100 |  |  |
Other Expenses |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Merger related expenses |  |  |  | $ 3,900 |  |  |
Hamilton Bancorp, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of interests acquired | 100.00% |  |  |  |  |  |
Cash paid | $ 14,197 |  |  |  |  |  |
Consideration paid | 50,819 |  |  |  |  |  |
Assets acquired excluding goodwill | 494,000 |  |  |  |  |  |
Loans acquired | 347,143 |  |  |  |  |  |
Securities available for sale | 60,882 |  |  |  |  |  |
Total liabilities assumed | 449,358 |  |  |  |  |  |
Deposits | 388,246 |  |  |  |  |  |
Goodwill | 6,132 |  |  |  |  |  |
Core deposit intangible | 4,550 |  |  |  |  |  |
Hamilton Bancorp, Inc. | Core deposit intangibles |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Core deposit intangible | $ 4,600 |  |  |  |  |  |
Amortization period | 10 years |  |  |  |  |  |
Hamilton Bancorp, Inc. | Common Stock |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Shares of common stock issued for acquisition (in shares) | shares | 1,765,704 |  |  |  |  |  |

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