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Administrative expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | $ 67,728 | $ 67,585 | $ 67,185
Personnel expenses |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 32,697 | 32,209 | 34,500
Professional fees |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 10,920 | 12,393 | 10,517
Sundry charges [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 9,070 | 8,968 | 7,766
Depreciation and amortization [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 2,460 | 3,680 | 3,700
Board of Directors' participation [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 3,873 | 1,992 | 2,178
Insurance [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 1,302 | 1,748 | 1,272
Software licenses [member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 1,420 | 1,723 | 1,731
Subscriptions and quotes [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 1,366 | 1,426 | 1,405
Communications [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 825 | 854 | 973
Donations [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 251 | 607 | 708
Maintenance and repairs [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 546 | 546 | 579
Consumption of materials and supplies |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 242 | 398 | 393
Canons and tributes [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 447 | 369 | 318
Short-term and low-value lease |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 1,554 | 294 | 611
Transport |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 525 | 278 | 255
Travel and mobility [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 230 | 100 | 153
Allowance for doubtful accounts [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | $ 0 | $ 0 | $ 126

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