| Component: (Network and Table) | |
|---|---|
| Network | 2407402 - Disclosure - Premises and Equipment (Details) (http://www.arrowbank.com/role/PremisesAndEquipmentDetails) |
| Table | Schedule of Property, Plant and Equipment [Table] |
| Reporting Entity [Axis] | 0000717538 (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 and Bank Premises [Member] | Equipment, Furniture and Fixtures [Member] | Leasehold Improvements [Member] | Total Cost, Property, Plant and Equipment [Domain] | Land and Bank Premises [Member] | Equipment, Furniture and Fixtures [Member] | Leasehold Improvements [Member] | Total Cost, Property, Plant and Equipment [Domain] | |
Total Cost | ||||||||
Accumulated Depreciation and Amortization | ( | ( | ||||||
Net Premises and Equipment | 26,938,000 | 27,440,000 | ||||||