XML 108 R56.htm IDEA: XBRL DOCUMENT v3.8.0.1
Pension and other post-retirement benefits (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure Of Defined Benefit Plans [Abstract]  
Information related to defined benefit plan
Pension benefit plansOther benefit plans
2017201620172016
Fair value of plan assets, beginning of year$8,652$10,632$-$-
Interest income on plan assets320403--
Return on assets excluding interest income(2)(127)--
Benefits paid(907)(2,254)--
Administrative costs paid(2)(2)--
Fair value of plan assets, end of year$8,061$8,652$-$-
Defined benefit obligation, beginning of year$54,930$52,996$23,421$21,771
Current service cost1,5441,6341,2271,153
Interest cost1,8101,842945900
Actuarial loss arising from:
- financial assumptions3,8406772,076373
- experience adjustment2,4031,60550161
Benefits paid(9,095)(2,970)(826)(937)
Foreign exchange540(854)--
Defined benefit obligation, end of year$55,972$54,930$26,893$23,421
Defined benefit liability [note 13]$(47,911)$(46,278)$(26,893)$(23,421)
Percentages of the total fair value of assets pension plan
Pension benefit plans
20172016
Asset category(a)
Canadian equity securities8%8%
Global equity securities16%15%
Canadian fixed income27%26%
Other(b)49%51%
Total100%100%

(a) The defined benefit plan assets contain no material amounts of related party assets at December 31, 2017 and 2016 respectively.

(b) Relates to the value of the refundable tax account held by the Canada Revenue Agency. The refundable total is approximately equal to half of the sum of the realized investment income plus employer contributions less half of the benefits paid by the plan.
Components of net pension and other benefit expense
The following represents the components of net pension and other benefit expense included primarily as part of
administration:
Pension benefit plansOther benefit plans
2017201620172016
Current service cost$1,544$1,634$1,227$1,153
Net interest cost1,4901,439945900
Administration cost22--
Defined benefit expense [note 16]3,0363,0752,1722,053
Defined contribution pension expense [note 16]15,92917,716--
Net pension and other benefit expense$18,965$20,791$2,172$2,053
Amount of actuarial losses (gains) recognized in other comprehensive income
The total amount of actuarial losses recognized in other comprehensive income is:
Pension benefit plansOther benefit plans
2017201620172016
Actuarial loss$6,243$2,282$2,126$534
Return on plan assets excluding
interest income2127--
$6,245$2,409$2,126$534
Defined benefit obligation and net pension and other benefit expense [Member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Assumptions to determine defined benefit obligations and expense
The assumptions used to determine the Company’s defined benefit obligation and net pension and other benefit expense
were as follows at December 31 (expressed as weighted averages):
Pension benefit plansOther benefit plans
2017201620172016
Discount rate - obligation3.4%3.9%3.4%3.9%
Discount rate - expense3.9%3.9%3.9%4.0%
Rate of compensation increase3.0%3.0%--
Initial health care cost trend rate--7.0%7.0%
Cost trend rate declines to--5.0%5.0%
Year the rate reaches its final level--20212021
Dental care cost trend rate--5.0%5.0%
1% Change in assumptions [member] | Defined benefit obligation and net pension and other benefit expense [Member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Assumptions to determine defined benefit obligations and expense
A 1% change at the reporting date to one of the relevant actuarial assumptions, holding other assumptions constant, would
have affected the defined benefit obligation by the following:
Pension benefit plansOther benefit plans
IncreaseDecreaseIncreaseDecrease
Discount rate $(7,103)$9,296$(3,693)$4,689
Rate of compensation increase2,841(2,598)n/an/a
A 1% change in any of the other assumptions would not have a significant impact on the defined benefit obligation.