Employee Benefit Plans (Schedule Of Reconciliation Of Changes In Projected Benefit Obligation, Fair Value Of Plan Assets And Funded Status Of Plan) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Employee Benefit Plans [Abstract]
Obligation at beginning of period	$ 177,195	$ 192,131
Service cost
Interest cost	9,838	10,466	9,006
Member contributions
Benefits paid	(4,118)	(4,426)
Actuarial gain	(1,558)	(14,651)
Currency translation	1,007	(6,325)
Obligation at valuation date	182,364	177,195	192,131
Fair value at beginning of period	132,022	120,383
Actual return on plan assets	(1,259)	14,959
Company contributions	5,293	5,105
Member contributions
Benefits paid	(4,118)	(4,426)
Currency translation	849	(3,999)
Plan assets at valuation date	132,787	132,022	120,383
Benefit obligation in excess of plan assets	(49,577)	(45,173)
Net liability recognized at end of period	$ (49,577)	$ (45,173)