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INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS
12 Months Ended
Dec. 31, 2015
Real Estate Partnership Investment Subsidiaries, Net Income (Loss) before Tax [Abstract]  
INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS
INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS
ACNB Corporation is a limited partner in three partnerships, whose purpose is to develop, manage and operate residential low-income properties. At December 31, 2015 and 2014, the carrying value of these investments was approximately $3,345,000 and $3,793,000, respectively.