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Retirement Benefits (Tables)
 12 Months Ended
Dec. 28, 2019
Retirement Benefits [Abstract]  
Schedule of Costs of Retirement Plans The following table reconciles the annual contribution (in thousands):
 
2019

 
2018

 
2017

Stock contribution
$
7,237

 
$
7,174

 
$
7,327

Cash contribution
21,171

 
21,413

 
23,834

Total annual contribution
$
28,408

 
$
28,587

 
$
31,161