Employee Benefits (Tables)

3 Months Ended

Apr. 04, 2015

Employee Benefits

Schedule of net periodic benefit cost of plans

	Three Months Ended
	April 4,		March 29,
(Thousands of dollars)	2015		2014
Components of net periodic benefit cost:
Service cost	$	2,447	$	1,856
Interest cost	2,550		2,403
Expected return on plan assets	(2,115)		(2,185)
Amortization and other	749		470
Net periodic benefit cost	$	3,631	$	2,544