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Employee future benefits (Tables) | 12 Months Ended
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Dec. 31, 2021
Employee Benefits [Abstract] |
Disclosure of net defined benefit liability (asset) |
| December 31, 2021 |  | December 31, 2020
Net defined benefit pension plan liability | $ | 1,814 |  |  | $ | 3,856 |
Net other post-retirement benefit plan liability | 80 |  |  | 85 |
Employee future benefits | $ | 1,894 |  |  | $ | 3,941 |
| Defined benefit obligation |  | Fair value of plan assets |  | Net defined benefit liability
Defined benefit pension plan | 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Balance at January 1 | $ | 20,203 |  |  | $ | 18,272 |  |  | $ | (16,347) |  |  | $ | (13,964) |  |  | $ | 3,856 |  |  | $ | 4,308 |
Included in profit or loss |  |  |  |  |  |  |  |  |  |  |
Current service cost | 37 |  |  | 36 |  |  | — |  |  | — |  |  | 37 |  |  | 36 |
Interest cost (income) | 476 |  |  | 566 |  |  | (383) |  |  | (440) |  |  | 93 |  |  | 126 |
Benefits payable | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
| 513 |  |  | 602 |  |  | (383) |  |  | (440) |  |  | 130 |  |  | 162 |
Included in other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Remeasurements loss (gain): |  |  |  |  |  |  |  |  |  |  |
Actuarial loss (gain) arising from: |  |  |  |  |  |  |  |  |  |  |
Demographic assumptions | 56 |  |  | (150) |  |  | — |  |  | — |  |  | 56 |  |  | (150) |
Financial assumptions | (986) |  |  | 2,054 |  |  | — |  |  | — |  |  | (986) |  |  | 2,054 |
Experience adjustment | 92 |  |  | 110 |  |  | — |  |  | — |  |  | 92 |  |  | 110 |
Return on plan assets excluding interest | — |  |  | — |  |  | (1,334) |  |  | (1,733) |  |  | (1,334) |  |  | (1,733) |
income |  |  |  |  |  |  |  |  |  |  |
Plan expenses | (30) |  |  | (36) |  |  | 30 |  |  | 36 |  |  | — |  |  | — |
| (868) |  |  | 1,978 |  |  | (1,304) |  |  | (1,697) |  |  | (2,172) |  |  | 281 |
Other |  |  |  |  |  |  |  |  |  |  |
Contributions paid by the employer | — |  |  | — |  |  | — |  |  | (895) |  |  | — |  |  | (895) |
Benefits paid | (661) |  |  | (649) |  |  | 661 |  |  | 649 |  |  | — |  |  | — |
| (661) |  |  | (649) |  |  | 661 |  |  | (246) |  |  | — |  |  | (895) |
Balance at December 31 | $ | 19,187 |  |  | $ | 20,203 |  |  | $ | (17,373) |  |  | $ | (16,347) |  |  | $ | 1,814 |  |  | $ | 3,856 |
| Defined benefit obligation |  | Fair value of plan assets |  | Net defined benefit liability
Other post-retirement benefit plan | 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Balance at January 1 | $ | 85 |  |  | $ | 88 |  |  | $ | — |  |  | $ | — |  |  | $ | 85 |  |  | $ | 88 |
Included in profit or loss |  |  |  |  |  |  |  |  |  |  |
Interest cost (income) | 1 |  |  | 2 |  |  | — |  |  | — |  |  | 1 |  |  | 2 |
| 1 |  |  | 2 |  |  | — |  |  | — |  |  | 1 |  |  | 2 |
Included in other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Remeasurements loss (gain): |  |  |  |  |  |  |  |  |  |  |
Actuarial loss (gain) arising from: |  |  |  |  |  |  |  |  |  |  |
Demographic assumptions | — |  |  | (5) |  |  | — |  |  | — |  |  | — |  |  | (5) |
Financial assumptions | (2) |  |  | 6 |  |  | — |  |  | — |  |  | (2) |  |  | 6 |
Experience adjustment | 4 |  |  | 7 |  |  | — |  |  | — |  |  | 4 |  |  | 7 |
| 2 |  |  | 8 |  |  | — |  |  | — |  |  | 2 |  |  | 8 |
Other |  |  |  |  |  |  |  |  |  |  |
Contributions paid by the employer | — |  |  | — |  |  | (8) |  |  | (13) |  |  | (8) |  |  | (13) |
Benefits paid | (8) |  |  | (13) |  |  | 8 |  |  | 13 |  |  | — |  |  | — |
| (8) |  |  | (13) |  |  | — |  |  | — |  |  | (8) |  |  | (13) |
Balance at December 31 | $ | 80 |  |  | $ | 85 |  |  | $ | — |  |  | $ | — |  |  | $ | 80 |  |  | $ | 85 |
Disclosure of comprehensive income by plan type |
Included in other comprehensive income (loss) | December 31, 2021 |  | December 31, 2020
Defined benefit pension plan actuarial gain (loss) | $ | 2,172 |  |  | $ | (281) |
Other post-retirement benefit plan actuarial loss | (2) |  |  | (8) |
| $ | 2,170 |  |  | $ | (289) |
Disclosure of fair value of plan assets | Pension plan assets comprise:
| 2021 |  | 2020
Cash and cash equivalents | 3 | % |  | 3 | %
Equity securities | 60 | % |  | 61 | %
Debt securities | 37 | % |  | 36 | %
Total | 100 | % |  | 100 | %
Disclosure of defined benefit plans | The significant actuarial assumptions adopted in measuring the fair value of benefit obligations at December 31 were as follows:
|  |  | 2021 |  |  |  | 2020
| Pension plan |  | Other benefit plan |  | Pension plan |  | Other benefit plan
Discount rate | 2.76 | % |  | 2.25 | % |  | 2.40 | % |  | 1.82 | %
Rate of compensation increase | n/a |  | n/a |  | n/a |  | n/a
The significant actuarial assumptions adopted in determining net expense for the years ended December 31 were as follows:
|  |  | 2021 |  |  |  | 2020
| Pension plan |  | Other benefit plan |  | Pension plan |  | Other benefit plan
Discount rate | 2.40 | % |  | 2.25 | % |  | 3.16 | % |  | 1.82 | %
Rate of compensation increase | n/a |  | n/a |  | n/a |  | n/a

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