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Pension Benefits (Tables)
9 Months Ended
Sep. 25, 2011
Pension Benefits 
Components of Net Periodic Benefit Cost
(amounts in thousands)
Quarter
(13 weeks) Ended
 
Nine Months
(39 weeks) Ended
 
September 25,
2011
September 26,
2010
 
September 25,
2011
September 26,
2010
Service cost
$    247
$    207
 
$    736
$    636
Interest cost
1,125
1,047
 
3,346
3,222
Expected return on plan assets
39
(15)
 
117
(45)
Amortization of actuarial loss (gain)
12
(6)
 
37
(18)
Amortization of transition obligation
33
30
 
98
92
Amortization of prior service costs
1
1
 
2
2
Net periodic pension cost
$ 1,457
$ 1,264
 
$ 4,336
$ 3,889