Pension And Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 25, 2011

Pension And Other Postretirement Benefits [Abstract]

Net Benefit Cost Of Pension And Postretirement Benefit Plans

	Pension Three Months Ended						Other Postretirement Benefits Three Months Ended						Pension Nine Months Ended						Other Postretirement Benefits Nine Months Ended
	September 25, 2011			September 26, 2010			September 25, 2011			September 26, 2010			September 25, 2011			September 26, 2010			September 25, 2011			September 26, 2010
										(Dollars in thousands)
Service cost	$	531		$	599		$	(37	)	$	138		$	1,723		$	1,856		$	359		$	518
Interest cost		4,387			4,239			441			427			12,973			12,817			1,541			1,732
Expected return on Plan assets		(5,160	)		(4,543	)		—			—			(15,003	)		(12,559	)		—			—
Net amortization and deferral		987			1,028			(172	)		(184	)		3,018			3,027			(34	)		78
Net benefit cost	$	745		$	1,323		$	232		$	381		$	2,711		$	5,141		$	1,866		$	2,328