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PENDING MERGER (Details) $ / shares in Units, $ in Thousands | Dec. 12, 2023 $ / shares | Mar. 31, 2024 USD ($) branchLocation $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Common stock, stated value (usd per share) | $ / shares |  | $ 0.05205 | $ 0.05205
Total assets |  | $ 3,183,331 | $ 3,064,240
Total loans |  | 2,273,908 | 2,269,611
Total deposits |  | $ 2,695,951 | $ 2,558,814
Common stock, shares outstanding (in shares) | shares |  | 10,705,077 | 10,612,390
Pending Acquisition, Codorus Valley Bancorp, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Full service branches | branchLocation |  | 22 |
Limited purpose branches | branchLocation |  | 8 |
Pending Acquisition, Codorus Valley Bancorp, Inc | Codorus Valley Bancorp, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Total assets |  | $ 2,200,000 | $ 2,200,000
Total loans |  | 1,700,000 | 1,700,000
Total deposits |  | $ 1,900,000 | $ 1,900,000
Common stock, shares outstanding (in shares) | shares |  | 9,662,378 | 9,642,851
Pending Acquisition, Codorus Valley Bancorp, Inc | Common Stock |  |  |
Business Acquisition [Line Items] |  |  |
Business combination, shares of common stock to be received by acquiree for number of shares outstanding | 0.875 |  |
Pending Acquisition, Codorus Valley Bancorp, Inc | Common Stock | Orrstown Financial Services Inc |  |  |
Business Acquisition [Line Items] |  |  |
Common stock, no par value (in usd per share) | $ / shares | $ 0 |  |
Pending Acquisition, Codorus Valley Bancorp, Inc | Common Stock | Codorus Valley Bancorp, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Common stock, stated value (usd per share) | $ / shares | $ 2.50 |  |

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