| Component: (Network and Table) | |
|---|---|
| Network | 151 - Disclosure - Premises and Equipment - Summary of Premises and Equipment (Detail) (http://www.benfrankbank.com/role/DisclosurePremisesAndEquipmentSummaryOfPremisesAndEquipment) |
| Table | Property, Plant and Equipment [Table] |
| Reporting Entity [Axis] | 0001618798 (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] | |||||
| Leasehold Improvements [Member] | Furniture and Equipment [Member] | Property, Plant and Equipment, Type [Domain] | Leasehold Improvements [Member] | Furniture and Equipment [Member] | Property, Plant and Equipment, Type [Domain] | |
Premises and equipment, gross | ||||||
Accumulated depreciation | ( | ( | ||||
Premises and equipment, net | 1,181,000 | 475,000 | ||||