| Component: (Network and Table) | |
|---|---|
| Network | 00000062 - Disclosure - Loans and Allowance for Loan Losses - Schedule of Changes in Allowance for Loan Losses (Details) (http://sgfc.com/role/LoansAndAllowanceForLoanLosses-ScheduleOfChangesInAllowanceForLoanLossesDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000315849 (http://www.sec.gov/CIK) |
| Receivables [Abstract] | Period [Axis] | ||
|---|---|---|---|
2016-01-01 - 2016-12-31 | 2015-01-01 - 2015-12-31 | 2014-01-01 - 2014-12-31 | |
Receivables [Abstract] | |||
Beginning balance | |||
Provisions charged to operations | |||
Loans charged off | ( | ( | ( |
Recoveries | |||
Balance at end of period | 3,032,242 | 3,114,151 | |