Pension and Postretirement Benefits (Tables)

3 Months Ended

Apr. 02, 2017

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

Components of net periodic cost

	Quarter Ended
	Pension				Postretirement
	April 2,		March 27,		April 2,		March 27,
	2017		2016		2017		2016
Service cost	$	952		998		172		132
Interest cost		4,725		4,606		295		294
Expected return on assets		(6,281)		(5,507)		-		-
Net amortization and deferrals		2,694		2,132		-		-
Net periodic benefit cost	$	2,090		2,229		467		426