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Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2020
Regulatory Matters [Abstract]  
Schedule of State Bank’s actual capital amounts and ratios
   Actual   For Capital Adequacy Purposes   To Be Well Capitalized
Under Prompt
Corrective Action
Procedures		 
($ in thousands)  Amount   Ratio   Amount   Ratio   Amount   Ratio 
As of December 31, 2020                        
Tier I Capital to average assets  $119,480    9.94%  $48,099    4.0%  $60,123    5.0%
Tier I Common equity capital to risk-weighted assets   119,480    12.91%   41,651    4.5%   60,162    6.5%
                               
Tier I Capital to risk-weighted assets   119,480    12.91%   55,534    6.0%   74,046    8.0%
Total Risk-based capital to risk-weighted assets   131,062    14.16%   74,046    8.0%   92,557    10.0%
                               
As of December 31, 2019                              
Tier I Capital to average assets  $116,884    11.36%  $41,165    4.0%  $51,456    5.0%
Tier I Common equity capital to risk-weighted assets   116,884    12.46%   42,204    4.5%   60,962    6.5%
                               
Tier I Capital to risk-weighted assets   116,884    12.46%   56,273    6.0%   75,030    8.0%
Total Risk-based capital to risk-weighted assets   125,639    13.40%   75,030    8.0%   93,788    10.0%