Pensions and Other Post-employment Benefits (Tables)

3 Months Ended

Mar. 30, 2012

Pensions and Other Post-employment Benefits [Abstract]

Components of net periodic benefit cost

	Pension Benefits						Other Benefits
	First Quarter Ended						First Quarter Ended
	Mar. 30,			Apr. 1,			Mar. 30,		Apr. 1,
(Thousands)	2012			2011			2012		2011
Components of net periodic benefit cost
Service cost	$	1,932		$	1,516		$	71	$	71
Interest cost		2,336			2,309			360		399
Expected return on plan assets		(2,926	)		(2,685	)		—		—
Amortization of prior service cost (benefit)		(84	)		(118	)		22		(9	)
Amortization of net loss		1,402			982			—		—
Net periodic benefit cost	$	2,660		$	2,004		$	453	$	461