Annual report pursuant to Section 13 and 15(d)

Allowance for Loan and Lease Losses - Summary of Troubled Debt Restructurings (TDRs) Based Upon Delinquency Status (Details)

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Allowance for Loan and Lease Losses - Summary of Troubled Debt Restructurings (TDRs) Based Upon Delinquency Status (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Contract
Dec. 31, 2019
USD ($)
Contract
Dec. 31, 2018
Contract
Financing Receivable Modifications [Line Items]      
Number of contracts 20 10  
Recorded Investment | $ $ 883 $ 407  
Allowance attributable to TDRs | $ $ 421 $ 113  
Commercial and Industrial Loans      
Financing Receivable Modifications [Line Items]      
Number of contracts 9 4 6
Real Estate | 1-4 Single Family Residential      
Financing Receivable Modifications [Line Items]      
Number of contracts     1
Performing TDRs      
Financing Receivable Modifications [Line Items]      
Number of contracts 6 5  
Recorded Investment | $ $ 231 $ 209  
Performing TDRs | Commercial and Industrial Loans      
Financing Receivable Modifications [Line Items]      
Number of contracts 2 2  
Recorded Investment | $ $ 49 $ 58  
Performing TDRs | Real Estate | 1-4 Single Family Residential      
Financing Receivable Modifications [Line Items]      
Number of contracts 3 3  
Recorded Investment | $ $ 130 $ 151  
Performing TDRs | Municipal and Other Loans      
Financing Receivable Modifications [Line Items]      
Number of contracts 1    
Recorded Investment | $ $ 52    
Nonperforming TDRs      
Financing Receivable Modifications [Line Items]      
Number of contracts 14 5  
Recorded Investment | $ $ 652 $ 198