| Component: (Network and Table) | |
|---|---|
| Network | 101210 - Disclosure - Fair Value Measurements - Reconciliation for Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs or Level 3 Inputs (Details) (http://www.firstbankonline.com/20161231/taxonomy/role/DisclosureFairValueMeasurementsReconciliationForAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisUsingSignificantUnobservableInputsOrLevel3InputsDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0001649749 (http://www.sec.gov/CIK) |
| Fair Value Disclosures [Abstract] | Period [Axis] | |
|---|---|---|
2016-01-01 - 2016-12-31 | 2015-01-01 - 2015-12-31 | |
Fair Value Disclosures [Abstract] | ||
Balance at beginning of period | ||
Realized gains included in net income | ||
Unrealized gains included in other comprehensive income | ||
Purchases | ||
Capital distribution | ( | |
Balance at end of period | 4,856,000 | |