ACL for Loans - Troubled Debt Restructures and Prior Period Trouble Debt Restructures (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
loan
Dec. 31, 2020
USD ($)
loan
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 7 16
Pre-modification Outstanding Recorded Investment $ 3,911 $ 7,756
Post-modification Outstanding Recorded Investment $ 3,574 $ 5,114
Number of TDRs that Defaulted | loan 3 10
Post-modification Outstanding Recorded Investment $ 696 $ 3,976
Allowance for credit losses associated with TDR loans listed above $ 33 $ 386
Extended maturity date    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 3 2
Post-modification Outstanding Recorded Investment $ 71 $ 150
Temporary payment reduction and payment re-amortization of remaining principal over extended term    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 2 10
Post-modification Outstanding Recorded Investment $ 885 $ 3,316
Temporary interest-only payment plan    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 1  
Post-modification Outstanding Recorded Investment $ 14  
Forbearance of post default rights    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan   4
Post-modification Outstanding Recorded Investment   $ 1,648
Other payment concessions    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 1  
Post-modification Outstanding Recorded Investment $ 2,604  
Commercial real estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 3 3
Pre-modification Outstanding Recorded Investment $ 3,591 $ 1,858
Post-modification Outstanding Recorded Investment $ 3,267 $ 1,838
Number of TDRs that Defaulted | loan 1 3
Post-modification Outstanding Recorded Investment $ 663 $ 1,838
Commercial and industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 3 5
Pre-modification Outstanding Recorded Investment $ 96 $ 976
Post-modification Outstanding Recorded Investment $ 85 $ 344
Number of TDRs that Defaulted | loan 2 2
Post-modification Outstanding Recorded Investment $ 33 $ 172
Commercial construction    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 0 6
Pre-modification Outstanding Recorded Investment $ 0 $ 4,754
Post-modification Outstanding Recorded Investment $ 0 $ 2,765
Number of TDRs that Defaulted | loan 0 4
Post-modification Outstanding Recorded Investment $ 0 $ 1,798
SBA Paycheck Protection Program ("PPP")    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 0 0
Pre-modification Outstanding Recorded Investment $ 0 $ 0
Post-modification Outstanding Recorded Investment $ 0 $ 0
Number of TDRs that Defaulted | loan 0 0
Post-modification Outstanding Recorded Investment $ 0 $ 0
Residential mortgages    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 1 0
Pre-modification Outstanding Recorded Investment $ 224 $ 0
Post-modification Outstanding Recorded Investment $ 222 $ 0
Number of TDRs that Defaulted | loan 0 0
Post-modification Outstanding Recorded Investment $ 0 $ 0
Home equity loans and lines    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 0 1
Pre-modification Outstanding Recorded Investment $ 0 $ 167
Post-modification Outstanding Recorded Investment $ 0 $ 167
Number of TDRs that Defaulted | loan 0 1
Post-modification Outstanding Recorded Investment $ 0 $ 168
Consumer    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Number of Restructurings | loan 0 1
Pre-modification Outstanding Recorded Investment $ 0 $ 1
Post-modification Outstanding Recorded Investment $ 0 $ 0
Number of TDRs that Defaulted | loan 0 0
Post-modification Outstanding Recorded Investment $ 0 $ 0