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MERGERS AND ACQUISITIONS (Details) $ / shares in Units, $ in Thousands | Oct. 23, 2018 $ / shares | Oct. 01, 2018 USD ($) shares | Sep. 30, 2018 USD ($) shares | Dec. 31, 2017 USD ($)
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Assets of acquiree |  |  | $ 1,720,755 | $ 1,558,849
Loans of acquiree |  |  | 1,071,129 | 997,216
Deposits of acquiree |  |  | 1,429,170 | $ 1,219,515
Mercersburg Financial Corporation |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Assets of acquiree |  |  | 184,161 |
Loans of acquiree |  |  | 147,386 |
Deposits of acquiree |  |  | 160,947 |
Hamilton Bancorp, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Assets of acquiree |  |  | 502,187 |
Loans of acquiree |  |  | 374,649 |
Deposits of acquiree |  |  | $ 388,471 |
Shares outstanding (in shares) | shares |  |  | 3,416,414 |
Subsequent Event | Common Stock | Hamilton Bancorp, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Consideration transferred, cash paid per acquiree shares (in usd per share) | $ / shares | $ 4.10 |  |  |
Acquisition stock exchange ratio | 0.54 |  |  |
Subsequent Event | Mercersburg Financial Corporation |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquisition, transaction value |  | $ 30,000 |  |
Acquisition, cash paid |  | $ 4,900 |  |
Subsequent Event | Mercersburg Financial Corporation | Common Stock |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, shares issued (in shares) | shares |  | 1,052,635 |  |

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