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Loans and Leases and the Allowance for Credit Losses - Additional Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
Loan
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Loan
Loan and lease portfolio      
Net gains related to sales of residential mortgage loans $ 100 $ 2,100  
Accrued interest receivable 45,392   $ 45,242
Revolving loans, converted to term loan during the period $ 1,400   4,100
Number of days non-accrual loans are not past due 30 days    
Recorded Investment $ 63,700   70,000
Available commitments to lend additional funds on loans modified as TDR 100   $ 200
Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure $ 1,500    
Minimum      
Loan and lease portfolio      
Default period past due following modification of loans in TDR (in days) 60 days    
Consumer      
Loan and lease portfolio      
Number of loan concessions - COVID-19 | Loan 1   11
Loan and lease modifications, amount - COVID-19 $ 200   $ 3,100
Commercial      
Loan and lease portfolio      
Number of loan concessions - COVID-19 | Loan 8   8
Loan and lease modifications, amount - COVID-19 $ 40,500   $ 40,500
Pass | Residential Mortgage      
Loan and lease portfolio      
Number of days past due for loans and leases in classified credit quality indicator 90 days    
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent) 60.00%    
Pass | Home Equity      
Loan and lease portfolio      
Number of days past due for loans and leases in classified credit quality indicator 90 days    
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent) 60.00%    
Maximum current combined loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent) 60.00%    
Classified | Consumer      
Loan and lease portfolio      
Number of days past due for loans and leases in classified credit quality indicator 90 days    
Classified | Residential Mortgage      
Loan and lease portfolio      
Number of days past due for loans and leases in classified credit quality indicator 90 days    
Classified | Home Equity      
Loan and lease portfolio      
Number of days past due for loans and leases in classified credit quality indicator 90 days    
Accrued Interest Receivable      
Loan and lease portfolio      
Accrued interest receivable $ 28,900   $ 28,700