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Disclosures on equity - Narrative (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  | 12 Months Ended
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Mar. 28, 2024 $ / shares | Nov. 15, 2023 $ / shares | Aug. 16, 2023 $ / shares | May 17, 2023 $ / shares | Apr. 26, 2023 $ / shares | Nov. 21, 2022 $ / shares | Aug. 17, 2022 $ / shares | May 18, 2022 $ / shares | Dec. 31, 2023 USD ($)
Disclosures Of Equity [Line Items] |  |  |  |  |  |  |  |  |
Contractual capital commitments | $ |  |  |  |  |  |  |  |  | $ 0
Borrowing ratio, maximum |  |  |  |  |  |  |  |  | 1.0
Minimum ownership required to call ordinary or extraordinary meeting, percentage |  |  |  |  |  |  |  |  | 50.00%
Number of consecutive limitation period of series B shares (in years) |  |  |  |  |  |  |  |  | 50 years
Final dividend (in USD per share) | $ 2.11386 |  |  |  | $ 3.22373 |  |  |  |
Interim dividend (in dollars per share) |  | $ 0.50347 | $ 0.60940 | $ 0.78760 |  |  | $ 1.84914 | $ 2.78716 |
Special dividend (in dollars per share) |  |  |  |  |  | $ 3.08056 |  |  |
Financial Parameter One |  |  |  |  |  |  |  |  |
Disclosures Of Equity [Line Items] |  |  |  |  |  |  |  |  |
Cash dividend rate, percentage |  |  |  |  |  |  |  |  | 100.00%
Cash dividend rate, financial parameters, liabilities less cash equivalents and other current financial assets divided by equity, ratio |  |  |  |  |  |  |  |  | 0.8
Cash dividend rate, financial parameters, current assets divided by current liabilities, ratio |  |  |  |  |  |  |  |  | 2.5
Financial Parameter Two |  |  |  |  |  |  |  |  |
Disclosures Of Equity [Line Items] |  |  |  |  |  |  |  |  |
Cash dividend rate, percentage |  |  |  |  |  |  |  |  | 80.00%
Cash dividend rate, financial parameters, liabilities less cash equivalents and other current financial assets divided by equity, ratio |  |  |  |  |  |  |  |  | 0.9
Cash dividend rate, financial parameters, current assets divided by current liabilities, ratio |  |  |  |  |  |  |  |  | 2.0
Financial Parameter Three |  |  |  |  |  |  |  |  |
Disclosures Of Equity [Line Items] |  |  |  |  |  |  |  |  |
Cash dividend rate, percentage |  |  |  |  |  |  |  |  | 60.00%
Cash dividend rate, financial parameters, liabilities less cash equivalents and other current financial assets divided by equity, ratio |  |  |  |  |  |  |  |  | 1.0
Cash dividend rate, financial parameters, current assets divided by current liabilities, ratio |  |  |  |  |  |  |  |  | 1.5
No Financial Parameters Met |  |  |  |  |  |  |  |  |
Disclosures Of Equity [Line Items] |  |  |  |  |  |  |  |  |
Cash dividend rate, percentage |  |  |  |  |  |  |  |  | 50.00%
Final dividend as per policy |  |  |  |  |  |  |  |  |
Disclosures Of Equity [Line Items] |  |  |  |  |  |  |  |  |
Final dividend (in USD per share) |  |  |  |  | $ 10.94060 |  |  |  |
Minimum |  |  |  |  |  |  |  |  |
Disclosures Of Equity [Line Items] |  |  |  |  |  |  |  |  |
Cash dividend rate, percentage |  |  |  |  |  |  |  |  | 30.00%

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