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Pension and Postretirement Benefits | 6 Months Ended
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Jul. 02, 2017
Pension and Postretirement Benefits (Thousands of Dollars) [Abstract] |
Pension and Postretirement Benefits | (7) Pension and Postretirement Benefits The components of the net periodic cost of the Company's defined benefit pension and other postretireme nt plans for the quarter and six-month periods ended July 2, 2017 and June 26, 2016 are as follows:
| Quarter Ended
| Pension |  | Postretirement
| July 2, |  | June 26, |  | July 2, |  | June 26,
| 2017 |  | 2016 |  | 2017 |  | 2016
Service cost | $ | 921 |  |  | 995 |  |  | 173 |  |  | 133
Interest cost |  | 4,430 |  |  | 4,604 |  |  | 295 |  |  | 293
Expected return on assets |  | (5,880) |  |  | (5,504) |  |  | - |  |  | -
Net amortization and deferrals |  | 2,519 |  |  | 2,132 |  |  | - |  |  | -
Net periodic benefit cost | $ | 1,990 |  |  | 2,227 |  |  | 468 |  |  | 426
| Six Months Ended
| Pension |  | Postretirement
| July 2, |  | June 26, |  | July 2, |  | June 26,
| 2017 |  | 2016 |  | 2017 |  | 2016
Service cost | $ | 1,873 |  |  | 1,993 |  |  | 345 |  |  | 265
Interest cost |  | 9,155 |  |  | 9,210 |  |  | 590 |  |  | 587
Expected return on assets |  | (12,161) |  |  | (11,011) |  |  | - |  |  | -
Net amortization and deferrals |  | 5,213 |  |  | 4,264 |  |  | - |  |  | -
Net periodic benefit cost | $ | 4,080 |  |  | 4,456 |  |  | 935 |  |  | 852
During the six months ended July 2, 2017, the Company made cash contributions to its defined benefit pe nsion plans of approximately $1,050 in the aggregate. The Company expects to contribute approximately $27,5 50 during the remainder of fiscal 2017.

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