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Portfolio loans - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) loan | Sep. 30, 2019 USD ($) loan | Sep. 30, 2020 USD ($) loan | Sep. 30, 2019 USD ($) loan
Distributions of portfolio loans |  |  |  |
Gross interest income that would have been recorded if impaired loans had been current | $ 500 | $ 500 | $ 1,400 | $ 1,600
TDRs subsequently classified as non-performing and had payment defaults | loan | 0 |  | 0 |
Commercial Real Estate Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans classified as a TDR |  |  |  | $ 3,200
TDRs subsequently classified as non-performing and had payment defaults | loan |  |  |  | 1
Retail Real Estate |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans in the process of foreclosure |  |  | $ 1,200 |
Maximum | Commercial Real Estate Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Limit where loans are processed through an expedited underwriting process |  |  | 1,000 |
Watch | Commercial Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Limit above which loans are annually reviewed |  |  | 1,000 |
Special Mention |  |  |  |
Distributions of portfolio loans |  |  |  |
Limit above which loans are annually reviewed |  |  | 350 |
In compliance with modified terms | Commercial Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans classified as a TDR |  |  |  | $ 600
Performing loans classified as TDRs | loan |  |  |  | 1
In compliance with modified terms | Commercial Loans | Short Term Interest Rate Relief |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans classified as a TDR |  | $ 300 |  | $ 300
Performing loans classified as TDRs | loan |  | 1 |  | 1
In compliance with modified terms | Retail Real Estate |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans classified as a TDR | $ 200 |  | $ 400 |
Performing loans classified as TDRs | loan | 1 |  | 2 |

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