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MERGERS AND ACQUISITIONS - Summary of Consideration Paid and Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Oct. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Estimated Fair Value Assets Acquired, and (Liabilities) Assumed
Goodwill		$ 12,592	$ 719	$ 719	$ 0
Mercersburg Financial Corporation
Consideration
Cash	$ 4,866
Common stock issued	25,053
Total Consideration Transferred	29,919
Estimated Fair Value Assets Acquired, and (Liabilities) Assumed
Cash and cash equivalents	17,273
Securities available for sale	7,352
Loans	141,103
Premises and Equipment	2,232
Core deposit intangibles	3,840
Goodwill	11,873
Cash surrender value of life insurance	6,252
Deferred tax assets, net	1,323
Other Assets	2,055
Deposits	(160,433)
Other liabilities	(2,951)
Total identifiable net assets	$ 29,919

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