Retirement And Benefit Plans (Tables)

3 Months Ended

9 Months Ended

Sep. 24, 2011

Sep. 24, 2011

Retirement And Benefit Plans [Abstract]

Components Of Net Periodic Pension And Other Postretirement Benefit Costs

	Three Months Ended
	Pension Benefits						Other Benefits
	September 24, 2011			September 25, 2010			September 24, 2011			September 25, 2010
	(thousands)
Service cost	$	636		$	691		$	57		$	65
Interest cost		17,544			18,553			253			301
Expected return on plan assets		(19,264	)		(20,873	)		—			—
Recognized actuarial loss		4,309			3,310			55			56
Amortization of prior service costs		—			—			(1,002	)		(1,001	)
Net periodic benefit cost (income)	$	3,225		$	1,681		$	(637	)	$	(579	)

	Nine Months Ended
	Pension Benefits						Other Benefits
	September 24, 2011			September 25, 2010			September 24, 2011			September 25, 2010
	(thousands)
Service cost	$	1,909		$	2,074		$	172		$	196
Interest cost		52,632			55,660			761			906
Expected return on plan assets		(59,467	)		(62,620	)		—			—
Recognized actuarial loss		13,062			9,929			165			168
Amortization of prior service costs and other		—			379			(3,007	)		(3,004	)
Net periodic benefit cost (income)	$	8,136		$	5,422		$	(1,909	)	$	(1,734	)