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Income Taxes - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]          
Net operating loss carryforwards $ 577,000        
Effective income tax rate reconciliation at federal federal tax benefit 14,143,000 $ 7,571,000 $ 6,581,000    
Charitable contribution carryforwards 43,000 57,000      
Riverview AMT credits 771,000 777,000      
Unrecognized tax benefits that would affect the effective income tax rate if recognized 0        
Income tax examination, penalties and interest expense 0 0 0    
Income tax examination, penalties and interest accrued 0 0      
CARES Act          
Income Taxes [Line Items]          
Income tax impacts of the components of other comprehensive income       21.00% 34.00%
Effective income tax rate reconciliation at federal federal tax benefit     318,000    
Tax credit carryforwards alternative minimum tax refundable percent       100.00%  
Scottdale Bank and Trust Company | CARES Act          
Income Taxes [Line Items]          
Net operating loss carryforwards       $ 1,200,000  
First Priority Financial Corporation          
Income Taxes [Line Items]          
Acquired Section 1231 losses 314,000        
Taxable income related to acquisition 1,900,000        
First Priority Financial Corporation | CARES Act          
Income Taxes [Line Items]          
Net operating loss carryforwards     $ 119,000 $ 1,200,000  
Riverview Acquisition          
Income Taxes [Line Items]          
Riverview AMT credits   $ 771,000      
Taxable income related to acquisition $ 2,000,000