Pension and Postretirement Benefits (Tables)

6 Months Ended

Jul. 01, 2018

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

Components of net periodic cost

	Quarter Ended
	Pension				Postretirement
	July 1,		July 2,		July 1,		July 2,
	2018		2017		2018		2017
Service cost	$	667		921		189		173
Interest cost		3,980		4,430		293		295
Expected return on assets		(5,174)		(5,880)		-		-
Net amortization and deferrals		2,965		2,519		43		-
Net periodic benefit cost	$	2,438		1,990		525		468

	Six Months Ended
	Pension				Postretirement
	July 1,		July 2,		July 1,		July 2,
	2018		2017		2018		2017
Service cost	$	1,352		1,873		377		345
Interest cost		7,996		9,155		585		590
Expected return on assets		(10,379)		(12,161)		-		-
Net amortization and deferrals		5,942		5,213		85		-
Net periodic benefit cost	$	4,911		4,080		1,047		935