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PREMISES AND EQUIPMENT - Narrative (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 2,609	$ 2,650	$ 2,311
Rent expense	781	$ 639	601
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment retired from active use			5,600
Loss in connection with retirement of premises and equipment			$ 147
Mercersburg Financial Corporation | Disposal Group, Held-for-sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Estimated fair value of bank premises acquired	$ 1,003

X

- Definition

Amount of gain (loss) from the disposal of an asset through means other than sale, for example, but not limited to, abandonment, spin-off, and expropriation.

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Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date.

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