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Loans and Allowance for Loan Losses - Additional Information (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Jun. 30, 2022
USD ($)
Contract
Jun. 30, 2021
USD ($)
Contract
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Loans And Leases Receivable Disclosure [Line Items]                
Outstanding balance of loans originated under PPP $ 2,213,149,000       $ 2,213,149,000   $ 1,944,071,000  
Interest income recognized on a cash basis for impaired loans   $ 0   $ 0        
Investment in TDR 100,000       100,000   1,800,000  
Specific allowance related to loans 0       0   200,000  
Additional commitments related to TDR 0       $ 0   0  
TDR, payment default within twelve months | Contract         0 0    
Loan period considered as payment default         30 days      
Loans held for sale 85,884,000       $ 85,884,000   83,715,000  
Allowance for loan and leases losses, Amount 21,684,000 20,857,000 $ 22,754,000 23,877,000 21,684,000 $ 22,754,000 21,698,000 $ 23,245,000
Residential Mortgage Loans                
Loans And Leases Receivable Disclosure [Line Items]                
Residential mortgage loans 21,800,000       21,800,000   37,300,000  
Troubled Debt Restructurings                
Loans And Leases Receivable Disclosure [Line Items]                
Specific allowance related to loans 0       0   0  
Tri-Net Commercial Real Estate                
Loans And Leases Receivable Disclosure [Line Items]                
Allowance for loan and leases losses, Amount 53,700,000       53,700,000   40,900,000  
Guaranteed SBA Loans                
Loans And Leases Receivable Disclosure [Line Items]                
Allowance for loan and leases losses, Amount 10,400,000       10,400,000   5,500,000  
Commercial and industrial                
Loans And Leases Receivable Disclosure [Line Items]                
Specific allowance related to loans 0       0      
Allowance for loan and leases losses, Amount $ 7,464,000 $ 7,206,000 8,401,000 $ 10,212,000 $ 7,464,000 8,401,000 7,441,000 $ 9,708,000
Payroll Protection Program                
Loans And Leases Receivable Disclosure [Line Items]                
Debt instrument, interest rate 1.00%       1.00%      
Fees recognized as income $ 200,000   $ 2,700,000   $ 700,000 $ 4,900,000    
Payroll Protection Program | Minimum                
Loans And Leases Receivable Disclosure [Line Items]                
Debt instrument, term         2 years      
Percentage of loan processing fee 1.00%       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%       5.00%      
Payroll Protection Program | Commercial and industrial                
Loans And Leases Receivable Disclosure [Line Items]                
Outstanding balance of loans originated under PPP $ 900,000       $ 900,000   $ 26,500,000