Investment securities available for sale - Summary of gross realized gains and losses to available for sale securities (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Investment securities available for sale | ||||
| Gross realized gains | $ 39 | $ 101 | ||
| Gross realized losses | $ 0 | (27) | ||
| Available-for-sale Securities, Gross Realized Gain (Loss), Total | $ 0 | $ 0 | $ 12 | $ 101 |