ACQUISITIONS - Schedule of Business Acquisitions Pro Forma (Details) - Walpart, Convert, and Torrent [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Net sales	$ 683,608	$ 694,713	$ 2,094,092	$ 2,078,680
Net earnings	$ 4,860	$ 36,482	$ 78,950	$ 123,986
Earnings per share-diluted (in dollars per share)	$ 220	$ 1,600	$ 3,500	$ 5,460