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Administrative expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | $ 69,183 | $ 67,728 | $ 67,585
Personnel expenses |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 34,356 | 32,697 | 32,209
Professional fees |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 9,907 | 10,920 | 12,393
Sundry charges |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 8,915 | 9,070 | 8,968
Board of Directors' compensation |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 2,223 | 3,873 | 1,992
Short-term and low-value lease |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 2,021 | 1,554 | 294
Depreciation and amortization |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 1,998 | 2,460 | 3,680
Subscriptions and quotes |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 1,469 | 1,366 | 1,426
Insurance |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 1,326 | 1,302 | 1,748
Maintenance and repairs |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 712 | 546 | 546
Communications |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 748 | 825 | 854
Transport |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 673 | 525 | 278
Canons and tributes |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 541 | 447 | 369
Travel and mobility |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 258 | 230 | 100
Consumption of materials and supplies |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 218 | 242 | 398
Donations |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 0 | 251 | 607
Software licenses |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | 0 | 1,420 | 1,723
Allowance for doubtful accounts [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses. | $ 3,818 | $ 0 | $ 0

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