Quarterly report pursuant to Section 13 or 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
3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
Contract
Mar. 31, 2020
Contract
Dec. 31, 2020
USD ($)
Contract
Financing Receivable Modifications [Line Items]      
Number of contracts 13   20
Recorded Investment | $ $ 659   $ 883
Allowance attributable to TDRs | $ $ 419   $ 421
Commercial and Industrial Loans      
Financing Receivable Modifications [Line Items]      
Number of contracts   4  
Real Estate | Commercial Real Estate Loans (Including Multifamily)      
Financing Receivable Modifications [Line Items]      
Number of contracts 2    
Performing TDRs      
Financing Receivable Modifications [Line Items]      
Number of contracts 6   6
Recorded Investment | $ $ 224   $ 231
Performing TDRs | Commercial and Industrial Loans      
Financing Receivable Modifications [Line Items]      
Number of contracts 2   2
Recorded Investment | $ $ 46   $ 49
Performing TDRs | Real Estate | 1-4 Single Family Residential Loans      
Financing Receivable Modifications [Line Items]      
Number of contracts 3   3
Recorded Investment | $ $ 126   $ 130
Performing TDRs | Municipal and Other Loans      
Financing Receivable Modifications [Line Items]      
Number of contracts 1   1
Recorded Investment | $ $ 52   $ 52
Nonperforming TDRs      
Financing Receivable Modifications [Line Items]      
Number of contracts 7   14
Recorded Investment | $ $ 435   $ 652