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Current and long-term debt - 2021 AVIC lease financing (Details) $ in Thousands | 2 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2021 USD ($) | Dec. 31, 2023 USD ($) | Oct. 31, 2023 USD ($) | Jul. 31, 2023 | Jan. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Apr. 30, 2021 USD ($) vessel | Feb. 28, 2021 USD ($) vessel
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings |  | $ 1,588,290 |  |  |  | $ 1,436,224 |  |
Purchase option fees |  |  | $ 1,700 |  | $ 1,200 |  |  |
Gross carrying amount |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings |  | 1,617,439 |  |  |  | 1,948,592 |  |
2021 AVIC Lease Financing |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings, bareboat charter term | 9 years |  |  |  |  |  |  |
Lease deposit, percent of borrowing amount |  |  |  |  |  |  | 1.00% |
Lease deposit, aggregate amount |  |  |  |  |  |  | $ 1,000 |
Net debt to capitalization ratio | 0.70 |  |  |  |  |  |  |
Consolidated tangible net worth | $ 650,000 |  |  |  |  |  |  |
Borrowings, restrictive covenant, minimum aggregate fair market value of vessels provided as collateral on or before the third anniversary of delivery, percent |  |  |  |  |  |  | 115.00% |
Borrowings, restrictive covenant, minimum aggregate fair market value of vessels provided as collateral after third anniversary of delivery, percent |  |  |  |  |  |  | 120.00% |
Deposits held by lessor |  | 1,000 |  |  |  | 1,000 |  |
Purchase option fees |  | 1,200 |  |  |  | 1,200 |  |
2021 AVIC Lease Financing | Gross carrying amount |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings |  | $ 77,567 |  |  |  | $ 83,662 |  |
2021 AVIC Lease Financing | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  | 3.45% |  |  |  |
STI Memphis and STI Soho | 2021 AVIC Lease Financing |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Number of vessels under finance lease arrangements | vessel |  |  |  |  |  |  |  | 2
STI Memphis and STI Soho | 2021 AVIC Lease Financing | Vessels |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | $ 44,200
STI Lombard and STI Osceola | 2021 AVIC Lease Financing | Vessels |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Number of vessels under finance lease arrangements | vessel |  |  |  |  |  |  | 2 |
Borrowings |  |  |  |  |  |  | $ 53,100 |

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