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Retirement Plans (Tables)
6 Months Ended
Jun. 24, 2012
Retirement Plans [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
 The following table summarizes the components of net periodic pension cost for the first two quarters of 2012 and 2011.

(Dollars in thousands)
Thirteen Weeks Ended
 
Twenty-six Weeks Ended
 
June 24,
2012
 
June 26,
2011
 
June 24,
2012
 
June 26,
2011
Service cost
$
61

 
$
74

 
$
122

 
$
148

Interest cost
306

 
329

 
610

 
658

Net amortization
65

 

 
131

 

Net periodic pension cost
$
432

 
$
403

 
$
863

 
$
806