| Component: (Network and Table) | |
|---|---|
| Network | 2405402 - Disclosure - PREMISES AND EQUIPMENT (Table) (Details) (http://www.acnb.com/role/PremisesAndEquipmentTableDetails) |
| Table | Schedule of Property, Plant and Equipment [Table] |
| Reporting Entity [Axis] | 0000715579 (http://www.sec.gov/CIK) |
| Property, Plant and Equipment [Line Items] | Period [Axis] | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
2016-12-31 | 2015-12-31 | |||||||||
| Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | |||||||||
| Land | Buildings and improvements | Furniture and equipment | Construction in process | Property, Plant and Equipment, Type [Domain] | Land | Buildings and improvements | Furniture and equipment | Construction in process | Property, Plant and Equipment, Type [Domain] | |
Premises and equipment, gross | ||||||||||
Accumulated depreciation | ( | ( | ||||||||
Premises and equipment, net | 18,153,000 | 18,044,000 | ||||||||