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General (Tables)
 3 Months Ended
Aug. 30, 2012
General [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated other comprehensive loss presented in the accompanying consolidated balance sheets consists of the following, all presented net of tax:

 

  August 30,
2012		  May 31,
2012		 
  (in thousands) 
Unrealized loss on available for sale investments $(8) $(8)
Unrecognized loss on terminated interest rate swap agreement  (41)  (58)
Net unrecognized actuarial loss for pension obligation  (4,073)  (4,073)
  $(4,122) $(4,139)
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table illustrates the computation of Common Stock and Class B Common Stock basic and diluted net earnings per share for net earnings and provides a reconciliation of the number of weighted-average basic and diluted shares outstanding:

 

  13 Weeks Ended
August 30, 2012		  13 Weeks Ended
August 25, 2011		 
  (in thousands, except per share data) 
Numerator:        
Net earnings $10,679  $12,477 
Denominator:        
Denominator for basic EPS  28,921   29,643 
Effect of dilutive employee stock options  43   26 
Denominator for diluted EPS  28,964   29,669 
Net earnings per share – basic:        
Common Stock $0.38  $0.43 
Class B Common Stock $0.35  $0.40 
Net earnings per share – diluted:        
Common Stock $0.37  $0.42 
Class B Common Stock $0.34  $0.40 
Schedule of Net Benefit Costs [Table Text Block]

The components of the net periodic pension cost of the Company’s unfunded nonqualified, defined-benefit plan are as follows:

 

  13 Weeks Ended
August 30, 2012		  13 Weeks Ended
August 25, 2011		 
  (in thousands) 
Service cost $178  $157 
Interest cost  275   295 
Net amortization of prior service cost and actuarial loss  71   30 
Net periodic pension cost $524  $482