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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 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Loans past due |  |
90+Days | $ 1,371 | $ 1,611
Non-accrual Loans | 22,930 | 27,896
30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 6,794 | 8,820
60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing | 784 | 5,451
Commercial |  |
Loans past due |  |
90+Days |  | 199
Non-accrual Loans | 8,523 | 9,096
Commercial | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 243 | 1,075
Commercial | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing |  | 1,014
Commercial real estate |  |
Loans past due |  |
90+Days |  | 584
Non-accrual Loans | 5,503 | 9,178
Commercial real estate | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing |  | 2,653
Commercial real estate | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing |  | 3,121
Real estate construction |  |
Loans past due |  |
Non-accrual Loans | 1 | 630
Real estate construction | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 237 | 19
Real estate construction | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing | 235 |
Retail Real Estate |  |
Loans past due |  |
90+Days | 1,305 | 828
Non-accrual Loans | 8,799 | 8,935
Retail Real Estate | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 6,248 | 5,021
Retail Real Estate | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing | 400 | 1,248
Retail Other |  |
Loans past due |  |
90+Days | 66 |
Non-accrual Loans | 104 | 57
Retail Other | 30 to 59 Days |  |
Loans past due |  |
Loans past due, still accruing | 66 | 52
Retail Other | 60 to 89 Days |  |
Loans past due |  |
Loans past due, still accruing | $ 149 | $ 68

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