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Financial risk - Change from allowance for credit loss (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | $ (2,551) | $ 13,576 | $ 11,849
Financial instruments that have been derecognized during the year | 16,873 | 30,007 | 39,259
New instruments originated or purchased | 21,752 | 14,967 | 27,840
Total | 2,328 | (1,464) | 430
Securities at amortized cost |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (20) | 38 | (18)
Financial instruments that have been derecognized during the year | 193 | 86 | 46
New instruments originated or purchased | 1,508 | 430 | 37
Total | 1,295 | 382 | (27)
FVOCI |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | 0 | 0 | 0
Financial instruments that have been derecognized during the year | 17 | 0 | 173
New instruments originated or purchased | 0 | 43 | 0
Total | (17) | 43 | (173)
Loans at amortized cost |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (2,477) | 13,459 | 11,714
Financial instruments that have been derecognized during the year | 14,715 | 28,036 | 36,534
New instruments originated or purchased | 17,343 | 12,828 | 25,695
Total | 151 | (1,749) | 875
Loan commitments and financial guarantee contracts |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (54) | 79 | 153
Financial instruments that have been derecognized during the year | 1,948 | 1,885 | 2,506
New instruments originated or purchased | 2,901 | 1,666 | 2,108
Total | 899 | (140) | $ (245)
Loss allowance | Securities at amortized cost |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (20) | 38 |
Financial instruments that have been derecognized during the year | 193 | 86 |
New instruments originated or purchased | 1,508 | 430 |
Loss allowance | FVOCI |  |  |
Credit risk |  |  |
Financial instruments that have been derecognized during the year | 17 |  |
New instruments originated or purchased |  | 43 |
Loss allowance | Stage 3 | Securities at amortized cost |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | 0 | 0 |
Financial instruments that have been derecognized during the year | 0 | 0 |
New instruments originated or purchased | 0 | 0 |
Loss allowance | Stage 3 | FVOCI |  |  |
Credit risk |  |  |
Financial instruments that have been derecognized during the year | 0 |  |
New instruments originated or purchased |  | 0 |
Loss allowance | Stage 1 | Securities at amortized cost |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (20) | 15 |
Financial instruments that have been derecognized during the year | 160 | 76 |
New instruments originated or purchased | 1,508 | 430 |
Loss allowance | Stage 1 | FVOCI |  |  |
Credit risk |  |  |
Financial instruments that have been derecognized during the year | 17 |  |
New instruments originated or purchased |  | 43 |
Loss allowance | Stage 2 | Stage 2 | Securities at amortized cost |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | 0 | 23 |
Financial instruments that have been derecognized during the year | 33 | 10 |
New instruments originated or purchased | 0 | 0 |
Loss allowance | Stage 2 | Stage 2 | FVOCI |  |  |
Credit risk |  |  |
Financial instruments that have been derecognized during the year | 0 |  |
New instruments originated or purchased |  | 0 |
Loss allowance | Loans at amortized cost |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (2,477) | 13,459 |
Financial instruments that have been derecognized during the year | 14,715 | 28,036 |
New instruments originated or purchased | 17,343 | 12,828 |
Loss allowance | Loans at amortized cost | Stage 3 |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | 438 | (118) |
Financial instruments that have been derecognized during the year | 0 | 0 |
New instruments originated or purchased | 0 | 0 |
Loss allowance | Loans at amortized cost | Stage 1 |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (874) | 134 |
Financial instruments that have been derecognized during the year | 13,100 | 24,307 |
New instruments originated or purchased | 17,343 | 12,828 |
Loss allowance | Loans at amortized cost | Stage 2 | Stage 2 |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (2,041) | 13,443 |
Financial instruments that have been derecognized during the year | 1,615 | 3,729 |
New instruments originated or purchased | 0 | 0 |
Loss allowance | Loan commitments and financial guarantee contracts |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (54) | 79 |
Financial instruments that have been derecognized during the year | 1,948 | 1,885 |
New instruments originated or purchased | 2,901 | 1,666 |
Loss allowance | Loan commitments and financial guarantee contracts | Stage 3 |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | 0 | 0 |
Financial instruments that have been derecognized during the year | 0 | 0 |
New instruments originated or purchased | 0 | 0 |
Loss allowance | Loan commitments and financial guarantee contracts | Stage 1 |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | (96) | 37 |
Financial instruments that have been derecognized during the year | 1,793 | 1,864 |
New instruments originated or purchased | 2,901 | 1,666 |
Loss allowance | Loan commitments and financial guarantee contracts | Stage 2 | Stage 2 |  |  |
Credit risk |  |  |
Net effect of changes in allowance for expected credit losses | 42 | 42 |
Financial instruments that have been derecognized during the year | 155 | 21 |
New instruments originated or purchased | $ 0 | $ 0 |

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