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Short Term Borrowings And Long-Term Debt (Narrative) (Details) (USD $)
9 Months Ended
Sep. 30, 2013
ACNB Bank [Member]
 
Debt Instrument [Line Items]  
Line of credit $ 3,000,000
Line of credit, balance 0
CVB Statutory Trust No. 2 [Member]
 
Debt Instrument [Line Items]  
Pooled trust preferred debt issuance 7,217,000
CVB Statutory Trust No. 1 [Member]
 
Debt Instrument [Line Items]  
Pooled trust preferred debt issuance $ 3,093,000