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INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS
12 Months Ended
Dec. 31, 2023
Real Estate Partnership Investment Subsidiaries, Net Income (Loss) before Tax [Abstract]  
INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPSACNB Corporation is a limited partner in two partnerships, whose purpose is to develop, manage and operate residential low-income properties. At December 31, 2023 and 2022, the carrying value of these investments was $1.0 million and $1.1 million, respectively. In December 2022, ACNB Corporation sold one limited partnership resulting in a $421 thousand gain.