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Allowance for Credit Losses - Loans Modified in Troubled Debt Restructuring (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
loan
Dec. 31, 2020
USD ($)
subsidiary
loan
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | loan 2 5
Pre- Modification Outstanding Recorded Investment $ 219 $ 345
Post-Modification Outstanding Recorded Investment $ 219 $ 345
Number of loans Defaulted TDRs | loan 1 2
Post- Modification Outstanding Recorded Investment TDRs $ 201 $ 124
Residential real estate | Mortgages    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | subsidiary   2
Pre- Modification Outstanding Recorded Investment   $ 274
Post-Modification Outstanding Recorded Investment   $ 274
Number of loans Defaulted TDRs | subsidiary   1
Post- Modification Outstanding Recorded Investment TDRs   $ 37
Residential real estate | Home equity    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | loan 2 1
Pre- Modification Outstanding Recorded Investment $ 219 $ 43
Post-Modification Outstanding Recorded Investment $ 219 $ 43
Number of loans Defaulted TDRs | loan 1 1
Post- Modification Outstanding Recorded Investment TDRs $ 201 $ 87
Commercial and Industrial | Other    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | loan   1
Pre- Modification Outstanding Recorded Investment   $ 24
Post-Modification Outstanding Recorded Investment   $ 24
Number of loans Defaulted TDRs | loan   0
Post- Modification Outstanding Recorded Investment TDRs   $ 0
Consumer and other | Other    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Loans | loan   1
Pre- Modification Outstanding Recorded Investment   $ 4
Post-Modification Outstanding Recorded Investment   $ 4
Number of loans Defaulted TDRs | loan   0
Post- Modification Outstanding Recorded Investment TDRs   $ 0