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Financial risk review - Schedule of Credit Risk Exposure (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Securities at amortized cost      
Credit risk      
Financial assets $ 1,360,497 $ 1,103,755  
Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 1,360,497 1,103,755  
Allowance | Securities at amortized cost      
Credit risk      
Financial assets 983 1,311 $ 1,632
Allowance | FVOCI      
Credit risk      
Financial assets 16 23 1
Expected credit losses individually assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets 0 0 0
Expected credit losses individually assessed | Allowance | FVOCI      
Credit risk      
Financial assets 0 0 0
Current | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets 918 1,133 1,230
Current | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets 16 23 1
Total | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets 65 178 402
Total | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets 0 0 0
Bank deposits | Allowance      
Credit risk      
Financial assets 155 0  
Bank deposits | Expected credit losses individually assessed | Allowance      
Credit risk      
Financial assets 0 0  
Bank deposits | Current | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets 155 0  
Bank deposits | Total | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets 0 0  
Loans      
Credit risk      
Financial assets 9,158,236 8,461,987  
Loans | Securities at amortized cost      
Credit risk      
Financial assets 9,158,236 8,461,987  
Loans | FVOCI      
Credit risk      
Financial assets 77,240 0  
Loans | Carrying amount - principal      
Credit risk      
Financial assets 9,158,236 8,461,987  
Loans | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 9,158,236 8,461,987  
Loans | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 77,240 0  
Loans | Allowance      
Credit risk      
Financial assets 93,808 78,158  
Loans | Allowance | Securities at amortized cost      
Credit risk      
Financial assets   78,158 59,410
Loans | Allowance | FVOCI      
Credit risk      
Financial assets 468 0  
Loans | Expected credit losses individually assessed | Allowance      
Credit risk      
Financial assets 28,979 12,483  
Loans | Expected credit losses individually assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets   12,483 6,898
Loans | Expected credit losses individually assessed | Allowance | FVOCI      
Credit risk      
Financial assets 0 0  
Loans | Current | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets 31,660 45,635  
Loans | Current | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets   45,635 34,778
Loans | Current | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets 468 0  
Loans | Total | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets 33,169 20,040  
Loans | Total | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets   20,040 17,734
Loans | Total | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets 0 0  
Commitments, financial guarantee contracts and acceptances outstanding      
Credit risk      
Financial assets 2,002,254 1,659,445  
Commitments, financial guarantee contracts and acceptances outstanding | Carrying amount - principal      
Credit risk      
Financial assets 161,597 245,065  
Commitments, financial guarantee contracts and acceptances outstanding | Allowance      
Credit risk      
Financial assets 12,130 5,375 5,059
Commitments, financial guarantee contracts and acceptances outstanding | Expected credit losses individually assessed | Allowance      
Credit risk      
Financial assets 0 0 0
Commitments, financial guarantee contracts and acceptances outstanding | Current | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets 12,128 4,815 3,905
Commitments, financial guarantee contracts and acceptances outstanding | Total | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets 2 560 $ 1,154
Credit risk | Securities at amortized cost      
Credit risk      
Financial assets 1,359,514 1,102,444  
Credit risk | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 1,360,497 1,103,755  
Credit risk | Allowance | Securities at amortized cost      
Credit risk      
Financial assets (983) (1,311)  
Credit risk | Allowance | FVOCI      
Credit risk      
Financial assets (16) (23)  
Credit risk | Grades 1 - 4 | 0.05-0.38 | Securities at amortized cost      
Credit risk      
Financial assets $ 1,294,293    
Credit risk | Grades 1 - 4 | 0.05-0.38 | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 0.05    
Credit risk | Grades 1 - 4 | 0.05-0.38 | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 0.38    
Credit risk | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets $ 69,476    
Credit risk | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Minimum of the year | FVOCI      
Credit risk      
Probability of Default 0.05    
Credit risk | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Maximum of the year | FVOCI      
Credit risk      
Probability of Default 0.38    
Credit risk | Grades 1 - 4 | 0.05-0.41 | Securities at amortized cost      
Credit risk      
Financial assets   $ 1,020,297  
Credit risk | Grades 1 - 4 | 0.05-0.41 | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   0.05  
Credit risk | Grades 1 - 4 | 0.05-0.41 | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   0.41  
Credit risk | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets   $ 99,486  
Credit risk | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Minimum of the year | FVOCI      
Credit risk      
Probability of Default   0.05  
Credit risk | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Maximum of the year | FVOCI      
Credit risk      
Probability of Default   0.41  
Credit risk | Grades 5 - 6 | 0.39-3.81 | Securities at amortized cost      
Credit risk      
Financial assets $ 66,204    
Credit risk | Grades 5 - 6 | 0.39-3.81 | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 0.39    
Credit risk | Grades 5 - 6 | 0.39-3.81 | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 3.81    
Credit risk | Grades 5 - 6 | 0.42-3.81 | Securities at amortized cost      
Credit risk      
Financial assets   $ 83,458  
Credit risk | Grades 5 - 6 | 0.42-3.81 | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   0.42  
Credit risk | Grades 5 - 6 | 0.42-3.81 | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   3.81  
Credit risk | Current | Expected credit losses collectively assessed | Securities at amortized cost      
Credit risk      
Financial assets $ 1,348,925 $ 1,092,140  
Credit risk | Current | Expected credit losses collectively assessed | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 1,349,843 1,093,273  
Credit risk | Current | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets (918) (1,133)  
Credit risk | Current | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets (16) (23)  
Credit risk | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Securities at amortized cost      
Credit risk      
Financial assets 1,294,293    
Credit risk | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Securities at amortized cost      
Credit risk      
Financial assets   1,020,297  
Credit risk | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 69,476 99,486  
Credit risk | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Securities at amortized cost      
Credit risk      
Financial assets 55,550    
Credit risk | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Securities at amortized cost      
Credit risk      
Financial assets   72,976  
Credit risk | Total | Expected credit losses collectively assessed | Securities at amortized cost      
Credit risk      
Financial assets 10,589 10,304  
Credit risk | Total | Expected credit losses collectively assessed | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 10,654 10,482  
Credit risk | Total | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets (65) (178)  
Credit risk | Total | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets 0 0  
Credit risk | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Securities at amortized cost      
Credit risk      
Financial assets 0    
Credit risk | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Securities at amortized cost      
Credit risk      
Financial assets   0  
Credit risk | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets   0  
Credit risk | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Securities at amortized cost      
Credit risk      
Financial assets 10,654    
Credit risk | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Securities at amortized cost      
Credit risk      
Financial assets   10,482  
Credit risk | Bank deposits      
Credit risk      
Financial assets 1,923,731 1,965,145  
Credit risk | Bank deposits | Carrying amount - principal      
Credit risk      
Financial assets 1,923,886 1,965,145  
Credit risk | Bank deposits | Allowance      
Credit risk      
Financial assets (155) 0  
Credit risk | Bank deposits | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets $ 1,923,151    
Credit risk | Bank deposits | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Minimum of the year      
Credit risk      
Probability of Default 0.05    
Credit risk | Bank deposits | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Maximum of the year      
Credit risk      
Probability of Default 0.38    
Credit risk | Bank deposits | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   $ 1,964,543  
Credit risk | Bank deposits | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Minimum of the year      
Credit risk      
Probability of Default   0.05  
Credit risk | Bank deposits | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Maximum of the year      
Credit risk      
Probability of Default   0.41  
Credit risk | Bank deposits | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets $ 660    
Credit risk | Bank deposits | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Minimum of the year      
Credit risk      
Probability of Default 0.39    
Credit risk | Bank deposits | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Maximum of the year      
Credit risk      
Probability of Default 3.81    
Credit risk | Bank deposits | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   $ 593  
Credit risk | Bank deposits | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Minimum of the year      
Credit risk      
Probability of Default   0.42  
Credit risk | Bank deposits | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Maximum of the year      
Credit risk      
Probability of Default   3.81  
Credit risk | Bank deposits | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets $ 75 $ 9  
Credit risk | Bank deposits | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Minimum of the year      
Credit risk      
Probability of Default 3.82 3.82  
Credit risk | Bank deposits | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Maximum of the year      
Credit risk      
Probability of Default 34.52 34.52  
Credit risk | Bank deposits | Expected credit losses individually assessed      
Credit risk      
Financial assets $ 0 $ 0  
Credit risk | Bank deposits | Expected credit losses individually assessed | Carrying amount - principal      
Credit risk      
Financial assets 0 0  
Credit risk | Bank deposits | Expected credit losses individually assessed | Allowance      
Credit risk      
Financial assets 0 0  
Credit risk | Bank deposits | Expected credit losses individually assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 0    
Credit risk | Bank deposits | Expected credit losses individually assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   0  
Credit risk | Bank deposits | Expected credit losses individually assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 0    
Credit risk | Bank deposits | Expected credit losses individually assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   0  
Credit risk | Bank deposits | Expected credit losses individually assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets 0 0  
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed      
Credit risk      
Financial assets 1,923,731 1,965,145  
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 1,923,886 1,965,145  
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets (155) 0  
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 1,923,151    
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   1,964,543  
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 660    
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   593  
Credit risk | Bank deposits | Current | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets 75 9  
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed      
Credit risk      
Financial assets 0 0  
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 0 0  
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets 0 0  
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 0    
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   0  
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 0    
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   0  
Credit risk | Bank deposits | Total | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets 0 0  
Credit risk | Loans | Securities at amortized cost      
Credit risk      
Financial assets 9,064,428 8,383,829  
Credit risk | Loans | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 9,158,236 8,461,987  
Credit risk | Loans | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 77,240    
Credit risk | Loans | Allowance | Securities at amortized cost      
Credit risk      
Financial assets (93,808) (78,158)  
Credit risk | Loans | Allowance | FVOCI      
Credit risk      
Financial assets (468)    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 5,399,585    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets $ 15,627    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 0.05    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Minimum of the year | FVOCI      
Credit risk      
Probability of Default 0.05    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 0.38    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Maximum of the year | FVOCI      
Credit risk      
Probability of Default 0.38    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   $ 2,971,709  
Credit risk | Loans | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   0.05  
Credit risk | Loans | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   0.41  
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets $ 3,491,032    
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets $ 61,613    
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 0.39    
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Minimum of the year | FVOCI      
Credit risk      
Probability of Default 0.39    
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 3.81    
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Maximum of the year | FVOCI      
Credit risk      
Probability of Default 3.81    
Credit risk | Loans | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   $ 5,004,052  
Credit risk | Loans | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   0.42  
Credit risk | Loans | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default   3.81  
Credit risk | Loans | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets $ 227,634 $ 468,713  
Credit risk | Loans | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 3.82 3.82  
Credit risk | Loans | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 34.52 34.52  
Credit risk | Loans | Grades 9 - 10 | 34.53-100 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets $ 39,985 $ 17,513  
Credit risk | Loans | Grades 9 - 10 | 34.53-100 | Carrying amount - principal | Minimum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 34.53 34.53  
Credit risk | Loans | Grades 9 - 10 | 34.53-100 | Carrying amount - principal | Maximum of the year | Securities at amortized cost      
Credit risk      
Probability of Default 100 100  
Credit risk | Loans | Expected credit losses individually assessed | Securities at amortized cost      
Credit risk      
Financial assets $ 11,006 $ 5,030  
Credit risk | Loans | Expected credit losses individually assessed | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 39,985 17,513  
Credit risk | Loans | Expected credit losses individually assessed | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Expected credit losses individually assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets (28,979) (12,483)  
Credit risk | Loans | Expected credit losses individually assessed | Allowance | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Expected credit losses individually assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 0    
Credit risk | Loans | Expected credit losses individually assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Expected credit losses individually assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   0  
Credit risk | Loans | Expected credit losses individually assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 0    
Credit risk | Loans | Expected credit losses individually assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Expected credit losses individually assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   0  
Credit risk | Loans | Expected credit losses individually assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 0 0  
Credit risk | Loans | Expected credit losses individually assessed | Grades 9 - 10 | 34.53-100 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 39,985 17,513  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Securities at amortized cost      
Credit risk      
Financial assets 8,905,572 8,027,883  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 8,937,232 8,073,518  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 77,240    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets (31,660) (45,635)  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets (468)    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 5,399,585    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 15,627    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   2,971,709  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 3,412,140    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 61,613    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   4,704,760  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 125,507 397,049  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 9 - 10 | 34.53-100 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 0 0  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Securities at amortized cost      
Credit risk      
Financial assets 147,850 350,916  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 181,019 370,956  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Allowance | Securities at amortized cost      
Credit risk      
Financial assets (33,169) (20,040)  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Allowance | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 0    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   0  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 78,892    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal | FVOCI      
Credit risk      
Financial assets 0    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets   299,292  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 102,127 71,664  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 9 - 10 | 34.53-100 | Carrying amount - principal | Securities at amortized cost      
Credit risk      
Financial assets 0 0  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding      
Credit risk      
Financial assets 1,990,124 1,654,070  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Carrying amount - principal      
Credit risk      
Financial assets 2,002,254 1,659,445  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Allowance      
Credit risk      
Financial assets (12,130) (5,375)  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Current | Expected credit losses collectively assessed      
Credit risk      
Financial assets 1,989,761 1,643,031  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Current | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 2,001,889 1,647,846  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Current | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets (12,128) (4,815)  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Total | Expected credit losses collectively assessed      
Credit risk      
Financial assets 363 11,039  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Total | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 365 11,599  
Credit risk | Commitments, financial guarantee contracts and acceptances outstanding | Total | Expected credit losses collectively assessed | Allowance      
Credit risk      
Financial assets (2) (560)  
Credit risk | Loans | Carrying amount - principal      
Credit risk      
Financial assets $ 1,840,657 $ 1,414,380  
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Minimum of the year      
Credit risk      
Probability of Default 0.05    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Maximum of the year      
Credit risk      
Probability of Default 0.38    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets $ 876,482    
Credit risk | Loans | Grades 1 - 4 | 0.05-0.41 | Minimum of the year      
Credit risk      
Probability of Default   0.05  
Credit risk | Loans | Grades 1 - 4 | 0.05-0.41 | Maximum of the year      
Credit risk      
Probability of Default   0.41  
Credit risk | Loans | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   $ 545,855  
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Minimum of the year      
Credit risk      
Probability of Default 0.39    
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Maximum of the year      
Credit risk      
Probability of Default 3.81    
Credit risk | Loans | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets $ 676,409    
Credit risk | Loans | Grades 5 - 6 | 0.42-3.81 | Minimum of the year      
Credit risk      
Probability of Default   0.42  
Credit risk | Loans | Grades 5 - 6 | 0.42-3.81 | Maximum of the year      
Credit risk      
Probability of Default   3.81  
Credit risk | Loans | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   $ 636,747  
Credit risk | Loans | Grades 7 - 8 | 3.82-34.52 | Minimum of the year      
Credit risk      
Probability of Default 3.82 3.82  
Credit risk | Loans | Grades 7 - 8 | 3.82-34.52 | Maximum of the year      
Credit risk      
Probability of Default 34.52 34.52  
Credit risk | Loans | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets $ 287,766 $ 231,778  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 1,840,292 1,402,781  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 876,482    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   545,855  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 676,044    
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   630,648  
Credit risk | Loans | Current | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets 287,766 226,278  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 365 11,599  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 0    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   0  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 365    
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   6,099  
Credit risk | Loans | Total | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets 0 5,500  
Credit risk | Customers' liabilities under acceptances | Carrying amount - principal      
Credit risk      
Financial assets 161,597 $ 245,065  
Credit risk | Customers' liabilities under acceptances | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 64,761    
Credit risk | Customers' liabilities under acceptances | Grades 1 - 4 | 0.05-0.41 | Minimum of the year      
Credit risk      
Probability of Default   0.05  
Credit risk | Customers' liabilities under acceptances | Grades 1 - 4 | 0.05-0.41 | Maximum of the year      
Credit risk      
Probability of Default   0.41  
Credit risk | Customers' liabilities under acceptances | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   $ 204,421  
Credit risk | Customers' liabilities under acceptances | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 31,284    
Credit risk | Customers' liabilities under acceptances | Grades 5 - 6 | 0.42-3.81 | Minimum of the year      
Credit risk      
Probability of Default   0.42  
Credit risk | Customers' liabilities under acceptances | Grades 5 - 6 | 0.42-3.81 | Maximum of the year      
Credit risk      
Probability of Default   3.81  
Credit risk | Customers' liabilities under acceptances | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   $ 1,155  
Credit risk | Customers' liabilities under acceptances | Grades 7 - 8 | 3.82-34.52 | Minimum of the year      
Credit risk      
Probability of Default   3.82  
Credit risk | Customers' liabilities under acceptances | Grades 7 - 8 | 3.82-34.52 | Maximum of the year      
Credit risk      
Probability of Default   34.52  
Credit risk | Customers' liabilities under acceptances | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets 65,552 $ 39,489  
Credit risk | Customers' liabilities under acceptances | Current | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 161,597 245,065  
Credit risk | Customers' liabilities under acceptances | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 64,761    
Credit risk | Customers' liabilities under acceptances | Current | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   204,421  
Credit risk | Customers' liabilities under acceptances | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 31,284    
Credit risk | Customers' liabilities under acceptances | Current | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   1,155  
Credit risk | Customers' liabilities under acceptances | Current | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets 65,552 39,489  
Credit risk | Customers' liabilities under acceptances | Total | Expected credit losses collectively assessed | Carrying amount - principal      
Credit risk      
Financial assets 0 0  
Credit risk | Customers' liabilities under acceptances | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.38 | Carrying amount - principal      
Credit risk      
Financial assets 0    
Credit risk | Customers' liabilities under acceptances | Total | Expected credit losses collectively assessed | Grades 1 - 4 | 0.05-0.41 | Carrying amount - principal      
Credit risk      
Financial assets   0  
Credit risk | Customers' liabilities under acceptances | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.39-3.81 | Carrying amount - principal      
Credit risk      
Financial assets 0    
Credit risk | Customers' liabilities under acceptances | Total | Expected credit losses collectively assessed | Grades 5 - 6 | 0.42-3.81 | Carrying amount - principal      
Credit risk      
Financial assets   0  
Credit risk | Customers' liabilities under acceptances | Total | Expected credit losses collectively assessed | Grades 7 - 8 | 3.82-34.52 | Carrying amount - principal      
Credit risk      
Financial assets $ 0 $ 0