Pension and Postretirement Benefits (Tables)

9 Months Ended

Oct. 01, 2017

Pension and Postretirement Benefits (Thousands of Dollars) [Abstract]

Components of net periodic cost

	Quarter Ended
	Pension				Postretirement
	October 1,		September 25,		October 1,		September 25,
	2017		2016		2017		2016
Service cost	$	925		1,002		172		132
Interest cost		4,443		4,611		295		294
Expected return on assets		(5,896)		(5,512)		-		-
Net amortization and deferrals		2,525		2,134		-		-
Net periodic benefit cost	$	1,997		2,235		467		426

	Nine Months Ended
	Pension				Postretirement
	October 1,		September 25,		October 1,		September 25,
	2017		2016		2017		2016
Service cost	$	2,798		2,995		517		397
Interest cost		13,598		13,821		885		881
Expected return on assets		(18,057)		(16,523)		-		-
Net amortization and deferrals		7,738		6,398		-		-
Net periodic benefit cost	$	6,077		6,691		1,402		1,278