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Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating Loss Carryforwards [Line Items]          
Unrealized loss on securities, tax expense $ 870,000 $ 721,000 $ 874,000    
Retained earnings not provided for provision for income tax 10,800,000        
Unrecognized deferred tax liability 2,800,000        
Unrecognized tax benefits 0 0 0    
Income tax benefit from revaluation of state deferred tax assets     $ 2,200,000    
Tax cuts and jobs act of 2017, change in tax rate, income tax expense (benefit)       $ 1,900,000 $ 3,600,000
Colonial American Bank          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards 4,300,000 4,600,000      
Operating loss carryforwards, subject to expiration 330,000        
Sun Bancorp, Inc.          
Operating Loss Carryforwards [Line Items]          
Purchase accounting adjustments   4,500,000      
Operating loss carryforwards 129,400,000 152,600,000      
Operating loss carryforwards, subject to expiration 23,300,000 9,300,000      
Tax credit 2,300,000 2,300,000      
New Jersey          
Operating Loss Carryforwards [Line Items]          
Tax credit   1,800,000      
Tax credit utilization   $ 1,400,000      
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        
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) $ 612,000