Employee Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Service cost	$ 851	$ 972	$ 855
Interest cost	3,874	4,418	4,331
Expected return on plan assets	41	155	(60)
Amortization of actuarial loss (gain)	224	50	(24)
Amortization of transition obligation	57	129	124
Amortization of prior service costs	2	2	2
Net periodic pension cost	5,049	5,726	5,228
Settlement loss	0	(46)	0
Curtailment loss (gain)	72	(104)	0
Total pension expense	$ 5,121	$ 5,668	$ 5,228