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Income Taxes - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2018
Dec. 31, 2017
Operating Loss Carryforwards [Line Items]          
Unrealized loss on securities, tax expense $ 10,400,000 $ (870,000) $ 721,000    
Retained earnings not provided for provision for income tax 10,800,000        
Tax cuts and jobs act of 2017, change in tax rate, income tax expense (benefit)       $ 1,900,000 $ 3,600,000
Unrecognized tax benefits 0 0 $ 0    
Accumulated Other Comprehensive (Loss) Gain          
Operating Loss Carryforwards [Line Items]          
Tax cuts and jobs act of 2017, change in tax rate, income tax expense (benefit) 550,000        
Other Comprehensive Income          
Operating Loss Carryforwards [Line Items]          
Tax cuts and jobs act of 2017, change in tax rate, income tax expense (benefit) 1,800,000        
Colonial American Bank          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards 3,900,000 4,300,000      
Operating loss carryforwards, subject to expiration 330,000        
Sun Bancorp, Inc.          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards 106,100,000 129,400,000      
Tax credit 2,300,000 $ 2,300,000      
Sun Bancorp, Inc. | Tax Year 2022          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards, limitations on use, amount 23,300,000        
Sun Bancorp, Inc. | After Tax Year 2022          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards, limitations on use, amount $ 9,300,000