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ACQUISITIONS - Schedule of Business Acquisitions Pro Forma (Details) - Walpart, Convert, and Torrent [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 29, 2019 | Jun. 30, 2018 | Jun. 29, 2019 | Jun. 30, 2018
Business Acquisition [Line Items] |  |  |  |
Net sales | $ 700,871 | $ 697,764 | $ 1,395,429 | $ 1,416,676
Net earnings | $ 41,397 | $ 35,167 | $ 78,116 | $ 74,758
Earnings per share-diluted (in dollars per share) | $ 1.90 | $ 1.56 | $ 3,570 | $ 3,300

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- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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