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Acquisitions and Purchase Accounting - Pro Forma Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]    
Net sales $ 3,022,279 $ 3,078,487
Net earnings $ 344,823 $ 285,642
Basic $ 6.20 $ 5.14
Diluted $ 6.20 $ 5.14