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Pension and Postretirement Benefits | 9 Months Ended
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Sep. 25, 2016
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 nine-month periods ended September 25, 2016 and September 27, 2015 are as follows:
| Quarter Ended
| Pension |  | Postretirement
| September 25, |  | September 27, |  | September 25, |  | September 27,
| 2016 |  | 2015 |  | 2016 |  | 2015
Service cost | $ | 1,002 |  |  | 1,006 |  |  | 132 |  |  | 150
Interest cost |  | 4,611 |  |  | 4,603 |  |  | 294 |  |  | 285
Expected return on assets |  | (5,512) |  |  | (5,476) |  |  | - |  |  | -
Net amortization and deferrals |  | 2,134 |  |  | 2,202 |  |  | - |  |  | (114)
Curtailment |  | - |  |  | 643 |  |  | - |  |  | (3,842)
Net periodic benefit cost | $ | 2,235 |  |  | 2,978 |  |  | 426 |  |  | (3,521)
| Nine Months Ended
| Pension |  | Postretirement
| September 25, |  | September 27, |  | September 25, |  | September 27,
| 2016 |  | 2015 |  | 2016 |  | 2015
Service cost | $ | 2,995 |  |  | 3,038 |  |  | 397 |  |  | 450
Interest cost |  | 13,821 |  |  | 13,827 |  |  | 881 |  |  | 855
Expected return on assets |  | (16,523) |  |  | (16,452) |  |  | - |  |  | -
Net amortization and deferrals |  | 6,398 |  |  | 6,610 |  |  | - |  |  | (341)
Curtailment |  | - |  |  | 781 |  |  | - |  |  | (3,842)
Net periodic benefit cost | $ | 6,691 |  |  | 7,804 |  |  | 1,278 |  |  | (2,878)
During the nine months ended September 25, 2016, the Company made cash contributions to its defined benefit pe nsion plans of approximately $64,800 in the aggregate. The Company expects to contribute approximately $350 during the remainder of fiscal 2016.

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