Employee Benefit Plans (Schedule Of Accrued Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 23, 2012	Jun. 24, 2012	Mar. 25, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Accrued pensions — current	$ 5,013	$ 4,687		$ 4,790	$ 4,610	$ 4,541	$ 4,429	$ 4,290	$ 4,530
Accrued pensions	99,677	98,189
Net amount recognized at end of year	104,690	102,876
Other comprehensive income attributable to prior service cost arising during year	158	0	0
Accumulated benefit obligation at end of year	$ 101,341	$ 99,028