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Note 3 - Earnings Per Share (Tables)
 9 Months Ended
Oct. 01, 2017
Notes Tables  
Distributed And Undistributed Earnings [Table Text Block]
   
Three Months Ended
    
Nine
Months Ended
  
   
Oct. 1, 2017
    
Oct. 2, 2016
    
Oct. 1, 2017
    
Oct. 2, 2016
  
Earnings Per Share
 
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
                                 
Basic Earnings Per Share
                                
Distributed Earnings
   $
0.07
     $
0.06
     $
0.19
     $
0.10
  
Undistributed Earnings
    
0.25
      
0.19
      
0.59
      
0.66
  
Total
   $
0.32
     $
0.25
     $
0.78
     $
0.76
  
                                 
Diluted Earnings Per Share
                                
Distributed Earnings
   $
0.07
     $
0.06
     $
0.19
     $
0.10
  
Undistributed Earnings
    
0.25
      
0.19
      
0.59
      
0.66
  
Total
   $
0.32
     $
0.25
     $
0.78
     $
0.76
  
                                 
Basic Earnin
gs
Per Share
   $
0.32
     $
0.25
     $
0.78
     $
0.76
  
Diluted Earnings Per Share
   $
0.32
     $
0.25
     $
0.78
     $
0.76
  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
N
i
ne
Months Ended
  
   
Oct.
1
, 201
7
    
Oct. 2, 2016
    
Oct.
1, 2017
    
Oct.
2
, 201
6
  
   
 
 
 
  
(
I
n millions)
    
 
 
 
Net Income Attributable to Participating Securities
   $
0.1
     $
0.1
     $
0.4
     $
0.4
  
   
Three Months Ended
    
N
i
ne
Months Ended
  
   
Oct. 1, 2017
    
Oct. 2, 2016
    
Oct. 1, 2017
    
Oct. 2, 2016
  
   
 
 
 
  
(In thousands)
    
 
 
 
Weighted Average Shares Outstanding
    
60,555
      
64,241
      
62,167
      
64,721
  
Participating Securities
    
463
      
564
      
463
      
564
  
Shares for Basic Earnings Per Share
    
61,018
      
64,805
      
62,630
      
65,285
  
Dilutive Effect of Stock Options
    
42
      
37
      
42
      
37
  
Shares for Diluted Earnings Per Share
    
61,060
      
64,842
      
62,672
      
65,322