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ACQUISITIONS - Pro Forma Information (Details) - Walpar, Convert, Torrent and CSP Coatings - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 29, 2018 | Dec. 30, 2017
Business Acquisition [Line Items] |  |
Net sales | $ 2,798,705 | $ 2,818,035
Net earnings | $ 97,170 | $ 122,407
Earnings per share-diluted (in dollars per share) | $ 4,320 | $ 5,390

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