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Note 9 - Retirement Plans (Tables)
6 Months Ended
Sep. 26, 2020
Notes Tables  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
  

Three Months Ended

  

Six Months Ended

 
  

September 26,
2020

  

September 28,
2019

  

September 26,
2020

  

September 28,
2019

 
                 

Service Cost Including Administration

 $3,259  $2,288  $6,519  $4,572 

Interest Cost

  2,302   2,296   4,605   4,593 

Expected Return on Plan Assets

  (3,510)  (3,958)  (7,021)  (7,913)

Amortization of Prior Service Cost

  23   30   46   60 

Amortization of Net Loss

  2,531   -   5,060   - 

Net Periodic Benefit Cost

 $4,605  $656  $9,209  $1,312