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Other long-term liabilities | 12 Months Ended
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Dec. 31, 2022
Subclassifications of assets, liabilities and equities [abstract] |
Other long-term liabilities | Other long-term liabilities:
As at | Dec 31 2022 | Dec 31 2021
Share-based compensation liability (note 14) | $ | 70,569 |  | $ | 68,634 |
Site restoration costs | 36,581 |  | 29,355 |
Land mortgage | 28,514 |  | 28,985 |
Defined benefit pension plans (note 21) | 19,216 |  | 20,616 |
Cash flow hedges (note 19) | 6,739 |  | 60,098 |
Other | 2,532 |  | 3,252 |
| 164,151 |  | 210,940 |
Less current maturities | (29,548) |  | (17,191) |
| $ | 134,603 |  | $ | 193,749 |
Site restoration costs: The Company has accrued liabilities related to the decommissioning and reclamation of its methanol production sites and oil and gas properties. Because of uncertainties in estimating the amount and timing of the expenditures related to the sites, actual results could differ from the amounts estimated. As at December 31, 2022, the total undiscounted amount of estimated cash flows required to settle the liabilities was $52.1 million (2021 - $33.9 million). The movement in the provision during the year is explained as follows:
| 2022 | 2021
Balance at January 1 | $ | 29,355 |  | $ | 31,941 |
New or revised provisions | 6,915 |  | (2,767) |
Accretion expense | 311 |  | 181 |
Balance at December 31 | $ | 36,581 |  | $ | 29,355 |

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- Definition The disclosure of other non-current liabilities. [Refer: Other non-current liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 10 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_10_e&doctype=Standard -URIDate 2022-03-24 + Details
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