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Business segment information - Schedule of geographic information analyses the bank's revenue and non-current assets by the bank's country (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | $ 104,206 | $ 99,157 | $ 126,657
Non-current assets | 19,374 | 21,411 | 23,673
Panama |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 5,872 | 7,580 | 8,649
Non-current assets | 18,795 | 19,888 | 20,976
Brazil |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 9,802 | 7,054 | 13,122
Non-current assets | 138 | 129 | 222
Mexico |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 17,318 | 14,480 | 18,757
Non-current assets | 75 | 535 | 1,510
Colombia |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 12,116 | 13,462 | 10,348
Non-current assets | 51 | 56 | 55
Costa Rica |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 10,862 | 8,494 | 7,906
Non-current assets | 0 | 0 | 0
Ecuador |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 8,990 | 9,242 | 13,640
Non-current assets | 0 | 0 | 0
Argentina |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 5,454 | 8,163 | 14,889
Non-current assets | 157 | 212 | 185
Other |  |  |
Disclosure of Reporting Segment [Line Items] |  |  |
Total revenues | 33,792 | 30,682 | 39,346
Non-current assets | $ 158 | $ 591 | $ 725

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