Employee Benefit Plans (Schedule Of Accrued Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010
Employee Benefit Plans [Abstract]
Accrued pensions - current	$ 4,453	$ 4,358
Accrued pensions	78,815	75,396
Net amount recognized at end of year	83,268	79,754
Other comprehensive income attributable to change in additional minimum liability recognition
Accumulated benefit obligation at end of year	$ 80,744	$ 77,361