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Employee future benefits - Future Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Employee Benefits Future Plans [Roll Forward] |  |
Net defined benefit liability (asset), beginning balance | $ 1,894 |
Other |  |
Net defined benefit liability (asset), ending balance | 455 | $ 1,894
Defined benefit pension plan |  |
Employee Benefits Future Plans [Roll Forward] |  |
Net defined benefit liability (asset), beginning balance | 1,814 | 3,856
Included in profit or loss |  |
Current service cost | 30 | 37
Interest cost (income) | 50 | 93
Benefits payable | 0 | 0
Future plan expense | 80 | 130
Actuarial loss (gain) arising from: |  |
Demographic assumptions | 0 | 56
Financial assumptions | (4,547) | (986)
Experience adjustment | (91) | 92
Return on plan assets excluding interest | 3,092 | (1,334)
Plan expenses | 0 | 0
Remeasurement (gains) losses | (1,546) | (2,172)
Other |  |
Contributions paid by the employer | 0 | 0
Benefits paid | 0 | 0
Other total | 0 | 0
Net defined benefit liability (asset), ending balance | 348 | 1,814
Defined benefit pension plan | Defined benefit obligation |  |
Employee Benefits Future Plans [Roll Forward] |  |
Net defined benefit liability (asset), beginning balance | 19,187 | 20,203
Included in profit or loss |  |
Current service cost | 30 | 37
Interest cost (income) | 518 | 476
Benefits payable | 0 | 0
Future plan expense | 548 | 513
Actuarial loss (gain) arising from: |  |
Demographic assumptions | 0 | 56
Financial assumptions | (4,547) | (986)
Experience adjustment | (91) | 92
Return on plan assets excluding interest | 0 | 0
Plan expenses | (24) | (30)
Remeasurement (gains) losses | (4,662) | (868)
Other |  |
Contributions paid by the employer | 0 | 0
Benefits paid | (671) | (661)
Other total | (671) | (661)
Net defined benefit liability (asset), ending balance | 14,402 | 19,187
Defined benefit pension plan | Fair value of plan assets |  |
Employee Benefits Future Plans [Roll Forward] |  |
Net defined benefit liability (asset), beginning balance | (17,373) | (16,347)
Included in profit or loss |  |
Current service cost | 0 | 0
Interest cost (income) | (468) | (383)
Benefits payable | 0 | 0
Future plan expense | (468) | (383)
Actuarial loss (gain) arising from: |  |
Demographic assumptions | 0 | 0
Financial assumptions | 0 | 0
Experience adjustment | 0 | 0
Return on plan assets excluding interest | 3,092 | (1,334)
Plan expenses | 24 | 30
Remeasurement (gains) losses | 3,116 | (1,304)
Other |  |
Contributions paid by the employer | 0 | 0
Benefits paid | 671 | 661
Other total | 671 | 661
Net defined benefit liability (asset), ending balance | (14,054) | (17,373)
Net other post-retirement benefit plan liability |  |
Employee Benefits Future Plans [Roll Forward] |  |
Net defined benefit liability (asset), beginning balance | 80 | 85
Included in profit or loss |  |
Interest cost (income) | 2 | 1
Future plan expense | 2 | 1
Actuarial loss (gain) arising from: |  |
Demographic assumptions | 0 | 0
Financial assumptions | (23) | (2)
Experience adjustment | 55 | 4
Remeasurement (gains) losses | 32 | 2
Other |  |
Contributions paid by the employer | (7) | (8)
Benefits paid | 0 | 0
Other total | (7) | (8)
Net defined benefit liability (asset), ending balance | 107 | 80
Net other post-retirement benefit plan liability | Defined benefit obligation |  |
Employee Benefits Future Plans [Roll Forward] |  |
Net defined benefit liability (asset), beginning balance | 80 | 85
Included in profit or loss |  |
Interest cost (income) | 2 | 1
Future plan expense | 2 | 1
Actuarial loss (gain) arising from: |  |
Demographic assumptions | 0 | 0
Financial assumptions | (23) | (2)
Experience adjustment | 55 | 4
Remeasurement (gains) losses | 32 | 2
Other |  |
Contributions paid by the employer | 0 | 0
Benefits paid | (7) | (8)
Other total | (7) | (8)
Net defined benefit liability (asset), ending balance | 107 | 80
Net other post-retirement benefit plan liability | Fair value of plan assets |  |
Employee Benefits Future Plans [Roll Forward] |  |
Net defined benefit liability (asset), beginning balance | 0 | 0
Included in profit or loss |  |
Interest cost (income) | 0 | 0
Future plan expense | 0 | 0
Actuarial loss (gain) arising from: |  |
Demographic assumptions | 0 | 0
Financial assumptions | 0 | 0
Experience adjustment | 0 | 0
Remeasurement (gains) losses | 0 | 0
Other |  |
Contributions paid by the employer | (7) | (8)
Benefits paid | 7 | 8
Other total | 0 | 0
Net defined benefit liability (asset), ending balance | $ 0 | $ 0

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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph c -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_c_iii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_f&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_140_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan in respect of settlements. [Refer: Decrease (increase) in net defined benefit liability (asset) resulting from gains (losses) arising from settlements; Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_g&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_c_i&doctype=Standard -URIDate 2022-03-24 + Details
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