Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net Sales	$ 406,348	$ 340,590
Cost of products sold	183,927	154,745
Gross Profit	222,421	185,845
Product development	15,289	14,259
Selling, marketing and distribution	62,522	54,389
General and administrative	32,914	29,762
Operating Earnings	111,696	87,435
Interest expense	3,233	4,055
Other expense, net	1,035	1,805
Earnings Before Income Taxes	107,428	81,575
Income taxes	21,918	20,843
Net Earnings	$ 85,510	$ 60,732
Basic earnings per share	$ 0.51	$ 0.36
Diluted earnings per share	0.49	0.35
Cash dividends declared (in dollars per share)	$ 0.13	$ 0.12