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Financial Instruments - Liquidity risk (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Non derivative financial Liabilities [Abstract] |  |  |
Short-term secured borrowings | $ 369,300 | $ 151,400 |
Long-term unsecured borrowings (including current portion) | 46,500 | 52,500 |
Lease liabilities | 11,675 | 15,860 |
Guarantee deposits | 66,631 | 55,215 |
Unsecured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Short-term unsecured borrowings | 0 | 0 | $ 0
Secured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Short-term secured borrowings | 369,300 | 151,400 | $ 104,000
Not later than Six months |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Short-term secured borrowings | 369,658 | 111,582 |
Lease liabilities | 2,188 | 2,460 |
Guarantee deposits | 14,532 | 1,165 |
Total | 390,668 | 118,374 |
Not later than Six months | Unsecured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Long-term unsecured borrowings (including current portion) | 4,290 | 3,167 |
Later than six months and not later than one year |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Short-term secured borrowings | 0 | 40,019 |
Lease liabilities | 2,166 | 2,298 |
Guarantee deposits | 0 | 0 |
Total | 6,325 | 45,476 |
Later than six months and not later than one year | Unsecured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Long-term unsecured borrowings (including current portion) | 4,159 | 3,159 |
Later than one year and not later than two years |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Lease liabilities | 4,868 | 3,881 |
Guarantee deposits | 52,099 | 5,840 |
Total | 65,026 | 16,008 |
Later than one year and not later than two years | Unsecured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Long-term unsecured borrowings (including current portion) | 8,059 | 6,287 |
Later than two years and not later than five years |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Lease liabilities | 2,693 | 7,513 |
Guarantee deposits |  | 48,210 |
Total | 24,879 | 74,347 |
Later than two years and not later than five years | Unsecured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Long-term unsecured borrowings (including current portion) | 22,186 | 18,624 |
Later than five years |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Short-term secured borrowings | 0 | 0 |
Lease liabilities | 0 | 22 |
Guarantee deposits | 0 | 0 |
Total | 17,740 | 22,800 |
Later than five years | Unsecured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Long-term unsecured borrowings (including current portion) | 17,740 | 22,778 |
Contractual Cash Flows |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Short-term secured borrowings | 369,658 | 151,601 |
Lease liabilities | 11,915 | 16,174 |
Guarantee deposits | 66,631 | 55,215 |
Total | 504,638 | 277,005 |
Contractual Cash Flows | Unsecured Borrowings |  |  |
Non derivative financial Liabilities [Abstract] |  |  |
Long-term unsecured borrowings (including current portion) | $ 56,434 | $ 54,015 |

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