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Allowance for Loan and Lease Losses - Loans Modified in Troubled Debt Restructuring (Details) - Financial Asset Originated
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
loan
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Number of Loans | loan 2
Pre-Modification Outstanding Recorded Investment $ 121
Post-Modification Outstanding Recorded Investment $ 121
Defaulted TDRs, Number of Loans | loan 2,000
Defaulted TDRs, Post-Modification Outstanding Recorded Investment $ 124
Commercial real estate | Other  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Number of Loans | loan 0
Pre-Modification Outstanding Recorded Investment $ 0
Post-Modification Outstanding Recorded Investment $ 0
Defaulted TDRs, Number of Loans | loan 1,000
Defaulted TDRs, Post-Modification Outstanding Recorded Investment $ 37
Residential real estate | Home equity  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Number of Loans | loan 2
Pre-Modification Outstanding Recorded Investment $ 121
Post-Modification Outstanding Recorded Investment $ 121
Defaulted TDRs, Number of Loans | loan 1,000
Defaulted TDRs, Post-Modification Outstanding Recorded Investment $ 87