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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 11. Fair Value Measurements and Financial Instruments The following methods and assumptions were used to estimate the fair value of each class of financial instruments and other non-financial assets. Cash, cash equivalents and restricted cash – The fair value of the Company’s cash and cash equivalents and restricted cash approximates their carrying amounts reported in the accompanying consolidated balance sheets. Short-term investments – The fair value of the Company’s short-term investments approximates their carrying amounts reported in the accompanying consolidated balance sheets. Marketable securities - The fair value of the Company's investment in marketable securities is estimated based on quoted prices in an active market. Operating lease right-of-use assets – The estimated fair value of the Company’s operating lease right-of-use assets are determined based on discounted cash flows. Long-term debt – The fair value of the Company’s fixed-rate and variable-rate long-term debt is either based on quoted market prices or estimated by the Company using discounted cash flow analyses, based on rates currently available for debt with similar terms and remaining maturities and the current credit worthiness of the Company. Alternatively, if the fixed-rate and variable-rate long-term debt is held for sale the fair value is based on the estimated sales price. Long-term obligation related to finance leases – The fair value of the Company's long-term obligation related to finance leases is estimated by the Company using discounted cash flow analyses, based on rates currently available for debt with similar terms and remaining maturities and the current credit worthiness of the Company. The Company categorizes its fair value estimates using a fair value hierarchy based on the inputs used to measure fair value. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value as follows: Level 1.Observable inputs such as quoted prices in active markets; Level 2.Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and Level 3.Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. The following table includes the estimated fair value and carrying value of those assets and liabilities that are measured at fair value on a recurring and non-recurring basis, as well as the estimated fair value of the Company’s financial instruments that are not accounted for at a fair value on a recurring basis.
|  |  | December 31, 2024 |  | December 31, 2023
| Fair Value Hierarchy Level |  | Carrying Amount Asset (Liability) $ |  | Fair Value Asset (Liability) $ |  | Carrying Amount Asset (Liability) $ |  | Fair Value Asset (Liability) $
Recurring: |  |  |  |  |  |  |  |  |
Cash, cash equivalents and restricted cash | Level 1 |  | 689,004 |  | 689,004 |  | 480,771 |  | 480,771 |
Short-term investments | Level 1 |  | 10,000 |  | 10,000 |  | 172,604 |  | 172,604
Marketable securities | Level 1 |  | 22,442 |  | 22,442 |  | — |  | —
Obligation relating to EU ETS (note 7)(1) | Level 1 |  | (6,588) |  | (6,588) |  | — |  | —
Non-recurring: |  |  |  |  |  |  |  |  |
Operating lease right-of-use assets (note15) | Level 2 |  | 11,735 |  | 11,735 |  | — |  | —
Other: |  |  |  |  |  |  |  |  |
Advances to equity-accounted joint venture – long-term | Level 2 |  | 380 |  | (2) |  | 2,880 |  | (2)
Obligations related to finance leases, including current portion (note 9) | Level 2 |  | — |  | — |  | (139,599) |  | (143,968)
(1)As part of the EU ETS requirements, for the year ended December 31, 2024, the Company recorded an obligation related to EU ETS which was included as part of accrued liabilities in the consolidated balance sheet as at December 31, 2024. This amount can include an accrual representing the difference between the total emissions liability and the carrying value of the EUAs held as at the end of the reporting period. The fair value of the accrual is estimated using the fair market value of an EUA that is traded on a regulated energy exchange at the end of the reporting period. As at December 31, 2024, an accrual of $0.7 million was made as the carrying value of the EUAs held was less than the total emissions liability. (2)The advances to its equity-accounted joint venture, together with the Company’s investment in the equity-accounted joint venture, form the net aggregate carrying value of the Company’s interests in the equity-accounted joint venture in these consolidated financial statements. As at December 31, 2024 and December 31, 2023, the fair values of the individual components of such aggregate interests were not determinable. The Company is exposed to credit loss in the event of non-performance by the financial institutions where its cash, cash equivalents and short-term investments are held. In order to minimize credit risk, the Company only places deposits and short-term investments with counterparties that are rated A- or better by Standard & Poor’s or A3 or better by Moody’s at the time of the transaction. In addition, to the extent practical, cash deposits and short-term investments are held by and entered into with, as applicable, different counterparties to reduce concentration risk. The Company's investment in marketable securities is exposed to equity price fluctuations that could have an impact on the fair value of the investment.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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