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Loans and Allowance for Loan Losses - Additional Information (Details)
3 Months Ended
Mar. 31, 2022
USD ($)
Contract
Mar. 31, 2021
USD ($)
Contract
Dec. 31, 2021
USD ($)
Loans And Leases Receivable Disclosure [Line Items]      
Outstanding balance of loans originated under PPP $ 2,026,698,000   $ 1,944,071,000
Interest income recognized on a cash basis for impaired loans 0 $ 0  
Investment in TDR 1,800,000   1,800,000
Specific allowance related to loans 0   200,000
Additional commitments related to TDR $ 0   0
New TDR identified during the period | Contract 0 0  
TDR, payment default within twelve months | Contract 0 0  
Loan period considered as payment default 30 days    
Impact of PCI loans on ALL $ 0    
Troubled Debt Restructurings      
Loans And Leases Receivable Disclosure [Line Items]      
Specific allowance related to loans 0   0
Commercial and industrial      
Loans And Leases Receivable Disclosure [Line Items]      
Specific allowance related to loans $ 0    
Payroll Protection Program      
Loans And Leases Receivable Disclosure [Line Items]      
Debt instrument, interest rate 1.00%    
Unamortized fees $ 200,000   600
Fees recognized as income $ 500 $ 1,800,000  
Payroll Protection Program | Minimum      
Loans And Leases Receivable Disclosure [Line Items]      
Debt instrument, term 2 years    
Percentage of loan processing fee 1.00%    
Payroll Protection Program | Maximum      
Loans And Leases Receivable Disclosure [Line Items]      
Debt instrument, term 5 years    
Percentage of loan processing fee 5.00%    
Payroll Protection Program | Commercial and industrial      
Loans And Leases Receivable Disclosure [Line Items]      
Outstanding balance of loans originated under PPP $ 6,500,000   $ 26,500,000