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Financial risk management (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Financial risk management [Line Items] |  |
Financial assets | $ 98,085 |
Time deposits [Member] | Financial Assets Neither Past Due Nor Impaired Total [Member] |  |
Financial risk management [Line Items] |  |
Financial assets | 905,170 |
Time deposits [Member] | Other banks with lower balances [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | $ 86
Investment Fund [Member] | Financial Assets Neither Past Due Nor Impaired Total [Member] |  |
Financial risk management [Line Items] |  |
Financial assets | 852,600 |
Moody's P-1 S&P A-1 [Member] | Time deposits [Member] | Banco crédito e Inversiones [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 9,002
Moody's P-1 S&P A-1 [Member] | Time deposits [Member] | Banco Santander - Santiago [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 16,702
Moody's P-1 S&P A-1 [Member] | Time deposits [Member] | Banco de Chile [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 10,503
Moody's P-1 S&P A-1 [Member] | Time deposits [Member] | Banco Estado [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 1,001
Moody's P-1 S&P A-1 [Member] | Time deposits [Member] | Banco de Crédito e Inversiones [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 185,589
Moody's P-1 S&P A-1 [Member] | 90 days to 1 year [Member] | Banco Santander [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 45,168
Moody's P-1 S&P A-1 Fitch N1+ [Member] | Investment Fund [Member] | JP Morgan Asset Management [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 34,028
Moody´s P-1 S&P A-2 Fitch F2 [Member] | Time deposits [Member] | Banco crédito e Inversiones [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 9,752 |
Moody's P-2 S&P A-2 [Member] | Time deposits [Member] | Banco Itau Corpbanca [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 195,471 | 7,299
Moody's P-2 S&P A-2 [Member] | Time deposits [Member] | Banco Itau Corpbanca [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 8,001 |
Moody's P-2 S&P A-2 [Member] | 90 days to 1 year [Member] | Banco Itau Corpbanca [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 49,006
Moody´s P-1 S&P A-2 [Member] | Time deposits [Member] | Banco crédito e Inversiones [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 34,325 |
Moody´s P-1 S&P A-2 [Member] | Time deposits [Member] | Banco Santander - Santiago [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 65,899 |
Moody´s P-1 S&P A-2 [Member] | Time deposits [Member] | Banco Santander [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 9,052 |
Moody´s P-1 S&P A-1 Fitch F1+ [Member] | Time deposits [Member] | Scotiabank Sud Americano [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 289,421 |
Moody´s P-1 S&P A-1 Fitch F1+ [Member] | Time deposits [Member] | Scotiabank Sud Americano [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 10,750 |
Fitch F1+ [Member] | Time deposits [Member] | Scotiabank Sud Americano [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 7,002
Fitch F1+ [Member] | Time deposits [Member] | Banco Scotiabank Sud Americano [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets |  | 31,668
Fitch F1+ [Member] | Time deposits [Member] | Other banks [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 200,100 |
Moody´s Aaa-mf S&P AAAm Fitch AAAmmf [Member] | Investment Fund [Member] | JP Morgan US dollar Liquidity Fund Institutional [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 381,297 | 102,753
S&P AAAm Fitch AAAmmf [Member] | Investment Fund [Member] | Legg Mason - Western Asset Institutional Cash Reserves [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 233,648 | $ 107,625
Moody´s P-1 Fitch F1 [Member] | Time deposits [Member] | Sumitomo Mitsui Banking [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 320,054 |
Moodys Plus [Member] | Bank notes [Member] | Agricultural Bank of China [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 860 |
Moodys Plus [Member] | Bank notes [Member] | Bank of China Limited [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 4,167 |
Moodys Plus [Member] | Bank notes [Member] | Bank of Communications [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 7,422 |
Moodys Plus [Member] | Bank notes [Member] | China Construction Bank Corporation [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 7,122 |
Moodys Plus [Member] | Bank notes [Member] | China Merchants Bank [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 22,628 |
Moodys Plus [Member] | Bank notes [Member] | Industrial Commercial Bank of China Limited [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 353 |
Moodys Plus [Member] | Bank notes [Member] | Industrial Bank [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 6,615 |
Moodys Plus [Member] | Bank notes [Member] | KEB Hana Bank (China) [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 1,121 |
Moodys Double Plus [Member] | Bank notes [Member] | China CITIC Bank Corp Ltd [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 2,623 |
Moodys Double Plus [Member] | Bank notes [Member] | China Everbright Bank Co. Ltd [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 6,569 |
Moodys Double Plus [Member] | Bank notes [Member] | Ping An Bank [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 8,391 |
Moodys Double Plus [Member] | Bank notes [Member] | Shanghai Pudong Development Bank Co. Ltd [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 7,905 |
SP Plus [Member] | Bank notes [Member] | Postal Savings Bank of China [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 4,718 |
Fitch Double Plus [Member] | Bank notes [Member] | China Minsheng Bank Corporation [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | 784 |
Fitch Plus [Member] | Bank notes [Member] | China Development Bank [Member] | Financial assets neither past due nor impaired [member] |  |
Financial risk management [Line Items] |  |
Financial assets | $ 16,807 |

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