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Retirement plans (Tables)
 12 Months Ended
Dec. 31, 2023
Employee Benefits [Abstract]  
Disclosure of net defined benefit liability (asset) Information concerning the Company’s defined benefit pension plans, in aggregate, is as follows:
As at
Dec 31
2023		Dec 31
2022
Accrued benefit obligations:
Balance, beginning of year
$53,586 $62,208 
Current service cost
2,246 2,329 
Past service cost
2,479 — 
Interest cost on accrued benefit obligations
2,549 2,007 
Benefit payments
(4,280)(5,760)
Settlements
(3,738)— 
Actuarial (gain) loss
2,074 (4,047)
Foreign exchange (gain) loss
265 (3,151)
Balance, end of year
55,181 53,586 
Fair values of plan assets:
Balance, beginning of year
38,347 46,608 
Interest income on assets
1,901 1,221 
Contributions
5,687 4,457 
Benefit payments
(4,280)(5,760)
Settlements
(3,680)— 
Return on plan assets
(705)(5,173)
Foreign exchange gain (loss)
938 (3,006)
Balance, end of year
38,208 38,347 
Unfunded status
16,973 15,239 
Minimum funding requirement
— — 
Defined benefit obligation, net
$16,973 $15,239 
Expense recognized in the income statement
The Company’s net defined benefit pension plan expense charged to the consolidated statements of income for the years ended December 31, 2023 and 2022 is as follows:
For the years ended December 31
20232022
Net defined benefit pension plan expense:
Current service cost
$2,246$2,329 
Past service cost
2,479— 
Net interest cost
648786 
Cost of settlement
(58)— 
Total net defined benefit pension plan expense$5,315$3,115 
Expense recognized in other comprehensive income
The Company’s current year actuarial losses, recognized in the consolidated statements of comprehensive income for the years ended December 31, 2023 and 2022, are as follows:
For the years ended December 31
20232022
Actuarial loss
$(2,827)$(726)
Disclosure of fair value of plan assets
The asset allocation for the defined benefit pension plan assets as at December 31, 2023 and 2022 is as follows:
As at
Dec 31
2023		Dec 31
2022
Equity securities
15%20%
Debt securities
52%49%
Cash and other short-term securities
33%31%
Total
100%100%