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Pension and Postretirement Benefits
6 Months Ended
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 postretirement plans for the quarter and six-month periods ended July 2, 2017 and June 26, 2016 are as follows:

Quarter Ended
PensionPostretirement
July 2,June 26,July 2,June 26,
2017201620172016
Service cost$921995173133
Interest cost4,4304,604295293
Expected return on assets(5,880)(5,504)--
Net amortization and deferrals2,5192,132--
Net periodic benefit cost$1,9902,227468426

Six Months Ended
PensionPostretirement
July 2,June 26,July 2,June 26,
2017201620172016
Service cost$1,8731,993345265
Interest cost9,1559,210590587
Expected return on assets(12,161)(11,011)--
Net amortization and deferrals5,2134,264--
Net periodic benefit cost$4,0804,456935852

During the six months ended July 2, 2017, the Company made cash contributions to its defined benefit pension plans of approximately $1,050 in the aggregate. The Company expects to contribute approximately $27,550 during the remainder of fiscal 2017.