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Note 9 - Retirement Plans (Tables)
3 Months Ended
Jun. 27, 2020
Notes Tables  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
  

Three Months Ended

 
  

June 27, 2020

  

June 29, 2019

 
         

Service Cost Including Administration

 $2,574  $2,288 

Interest Cost

  2,251   2,296 

Expected Return on Plan Assets

  (3,567)  (3,958)

Amortization of Prior Service Cost

  23   30 

Amortization of Net Loss

  2,224   - 

Net Periodic Benefit Cost

 $3,505  $656