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Portfolio Loans and allowance for credit losses - Analysis of loans past due and still accruing or non-accrual status (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Loans past due |  |
90+Days | $ 491 | $ 1,371
Non-accrual Loans | 25,369 | 22,930
30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 4,224 | 6,794
60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing | 2,222 | 784
Commercial |  |
Loans past due |  |
Non-accrual Loans | 10,230 | 8,523
Commercial | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 1,092 | 243
Commercial | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing | 202 |
Commercial real estate |  |
Loans past due |  |
Non-accrual Loans | 6,620 | 5,503
Commercial real estate | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 882 |
Real estate construction |  |
Loans past due |  |
Non-accrual Loans |  | 1
Real estate construction | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing |  | 237
Real estate construction | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing |  | 235
Retail Real Estate |  |
Loans past due |  |
90+Days | 491 | 1,305
Non-accrual Loans | 8,482 | 8,799
Retail Real Estate | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 2,068 | 6,248
Retail Real Estate | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing | 2,020 | 400
Retail Other |  |
Loans past due |  |
90+Days |  | 66
Non-accrual Loans | 37 | 104
Retail Other | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | $ 182 | 66
Retail Other | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing |  | $ 149

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