Employee Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Employee Benefit Plans [Abstract]
Service cost	$ 972	$ 855	$ 1,020
Interest cost	4,418	4,331	4,643
Expected return on plan assets	155	(60)	(67)
Amortization of actuarial loss (gain)	50	(24)	(10)
Amortization of transition obligation	129	124	130
Amortization of prior service costs	2	2	3
Net periodic pension cost	5,726	5,228	5,719
Settlement loss	46
Curtailment gain	(104)
Total pension expense	$ 5,668	$ 5,228	$ 5,719