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Loans and Allowance for Loan Losses - Impaired loans (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Impaired |  |
Loans with related allowance for loan losses, Recorded investment | $ 2,738 | $ 6,362
Loans with related allowance for loan losses, unpaid principal | 2,825 | 6,556
Loans with related allowance for loan losses, Related Allowance | 407 | 3,138
Loans with no related allowance for loan losses, Recorded investment | 2,970 | 1,592
Loans with no related allowance for loan losses, unpaid principal | 3,332 | 2,515
Recorded investment | 5,708 | 7,954
Unpaid principal balance | 6,157 | 9,071
Commercial | Commercial and industrial |  |
Impaired |  |
Loans with related allowance for loan losses, Recorded investment | 2,523 | 639
Loans with related allowance for loan losses, unpaid principal | 2,609 | 727
Loans with related allowance for loan losses, Related Allowance | 379 | 189
Loans with no related allowance for loan losses, Recorded investment | 974 | 337
Loans with no related allowance for loan losses, unpaid principal | 1,159 | 1,110
Recorded investment | 3,497 | 976
Unpaid principal balance | 3,768 | 1,837
Commercial | Commercial real estate |  |
Impaired |  |
Loans with related allowance for loan losses, Recorded investment | 196 | 5,718
Loans with related allowance for loan losses, unpaid principal | 196 | 5,823
Loans with related allowance for loan losses, Related Allowance | 9 | 2,946
Loans with no related allowance for loan losses, Recorded investment | 1,329 | 207
Loans with no related allowance for loan losses, unpaid principal | 1,448 | 236
Recorded investment | 1,525 | 5,925
Unpaid principal balance | 1,644 | 6,059
Consumer | Residential | Real estate first mortgage |  |
Impaired |  |
Loans with no related allowance for loan losses, Recorded investment | 457 | 782
Loans with no related allowance for loan losses, unpaid principal | 469 | 797
Recorded investment | 457 | 782
Unpaid principal balance | 469 | 797
Consumer | Residential | Real estate junior lien |  |
Impaired |  |
Loans with related allowance for loan losses, Recorded investment | 19 |
Loans with related allowance for loan losses, unpaid principal | 20 |
Loans with related allowance for loan losses, Related Allowance | 19 |
Loans with no related allowance for loan losses, Recorded investment | 210 | 266
Loans with no related allowance for loan losses, unpaid principal | 256 | 372
Recorded investment | 229 | 266
Unpaid principal balance | $ 276 | 372
Consumer | Other revolving and installment |  |
Impaired |  |
Loans with related allowance for loan losses, Recorded investment |  | 5
Loans with related allowance for loan losses, unpaid principal |  | 6
Loans with related allowance for loan losses, Related Allowance |  | 3
Recorded investment |  | 5
Unpaid principal balance |  | $ 6

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