|
|
|
Pension benefits |
|
Postretirement benefits |
|
||||||||
|
|
|
2017 |
|
2016 |
|
2017 |
|
2016 |
|
||||
|
|
|
|
|
|
|
|
|
|
|
||||
|
Change in benefit obligations |
|
|
|
|
|
|
|
|
|
||||
|
Benefit obligations at the beginning of the year |
|
$ |
394,246 |
|
$ |
355,410 |
|
$ |
38,010 |
|
$ |
34,690 |
|
|
Service costs |
|
22,594 |
|
22,902 |
|
1,579 |
|
1,474 |
|
||||
|
Interest costs |
|
15,455 |
|
14,476 |
|
1,535 |
|
1,438 |
|
||||
|
Plan participants’ contributions |
|
6,728 |
|
6,946 |
|
— |
|
— |
|
||||
|
Actuarial (gain) loss arising from: |
|
|
|
|
|
|
|
|
|
||||
|
Demographic assumptions |
|
(8,502 |
) |
— |
|
— |
|
— |
|
||||
|
Financial assumptions |
|
37,943 |
|
8,681 |
|
2,903 |
|
859 |
|
||||
|
Participant experience |
|
4,875 |
|
1,533 |
|
(13,443 |
) |
— |
|
||||
|
Benefits and settlements paid |
|
(16,695 |
) |
(16,125 |
) |
(467 |
) |
(451 |
) |
||||
|
Other |
|
235 |
|
423 |
|
— |
|
— |
|
||||
|
|
|
|
|
|
|
|
|
|
|
||||
|
Benefit obligations at the end of the year |
|
$ |
456,879 |
|
$ |
394,246 |
|
$ |
30,117 |
|
$ |
38,010 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Pension benefits |
|
Postretirement benefits |
|
||||||||
|
|
|
2017 |
|
2016 |
|
2017 |
|
2016 |
|
||||
|
|
|
|
|
|
|
|
|
|
|
||||
|
Change in plan assets |
|
|
|
|
|
|
|
|
|
||||
|
Fair value of plan assets at the beginning of the year |
|
$ |
361,232 |
|
$ |
321,117 |
|
$ |
— |
|
$ |
— |
|
|
Actual return on plan assets |
|
29,789 |
|
28,189 |
|
— |
|
— |
|
||||
|
Employer contributions |
|
26,817 |
|
20,682 |
|
467 |
|
451 |
|
||||
|
Plan participants’ contributions |
|
6,728 |
|
6,946 |
|
— |
|
— |
|
||||
|
Benefits and settlements paid |
|
(16,695 |
) |
(16,125 |
) |
(467 |
) |
(451 |
) |
||||
|
Administrative fees |
|
234 |
|
423 |
|
— |
|
— |
|
||||
|
|
|
|
|
|
|
|
|
|
|
||||
|
Fair value of plan assets at the end of the year |
|
$ |
408,105 |
|
$ |
361,232 |
|
$ |
— |
|
$ |
— |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|