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III. Financial Risk Management - Proportions of Variable-rate and Fixed-rate Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |
Significant borrowings as of closing date |  | $ 728,762 | $ 330,933
Fixed interest rate [member] |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |
Significant borrowings as of closing date | [1] | $ 497,889 | $ 187,036
Concentration risk (as a percent) | [1] | 68.00% | 57.00%
Floating interest rate [member] |  |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |  |
Significant borrowings as of closing date |  | $ 230,873 | $ 143,897
Concentration risk (as a percent) |  | 32.00% | 43.00%
[1] | Out of the $497.9 million fixed rate borrowings, $479 million are short-term.

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