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INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS | 12 Months Ended
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Dec. 31, 2017
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, 2017 and 2016, the carrying value of these investments was approximately $2,446,000 and $2,899,000, respectively.

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- Definition The entire disclosure for certain real estate investment financial statements, real estate investment trust operating support agreements, real estate owned, retail land sales, time share transactions, as well as other real estate related disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -URI http://asc.fasb.org/topic&trid=2156125 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 972 -URI http://asc.fasb.org/topic&trid=2134617 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 978 -URI http://asc.fasb.org/topic&trid=2134977 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 974 -URI http://asc.fasb.org/topic&trid=2156429 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 976 -URI http://asc.fasb.org/topic&trid=2134846 + Details
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