CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Income Statement [Abstract]
Net revenues	$ 609,672	$ 534,703	$ 1,806,768	$ 1,551,197
Cost of goods sold	267,099	239,476	788,147	710,126
Gross profit	342,573	295,227	1,018,621	841,071
Selling, general and administrative expenses	214,894	163,771	660,148	486,674
Research and development expenses	26,365	21,194	78,410	59,299
Restructuring and impairment charges (credits)	19,209	(92)	77,625	13,723
Income from continuing operations before interest, loss on extinguishment of debt and taxes	82,105	110,354	202,438	281,375
Interest expense	27,171	21,264	79,763	58,884
Interest income	(320)	(286)	(776)	(616)
Loss on extinguishment of debt	0	0	0	5,593
Income from continuing operations before taxes	55,254	89,376	123,451	217,514
(Benefit) taxes on income from continuing operations	(1,286)	9,978	14,532	19,404
Income from continuing operations	56,540	79,398	108,919	198,110
Operating income (loss) from discontinued operations	(83)	(3,749)	1,246	(4,597)
Tax (benefit) on income (loss) from discontinued operations	(67)	(1,366)	(47)	(1,675)
Income (loss) from discontinued operations	(16)	(2,383)	1,293	(2,922)
Net income	$ 56,524	$ 77,015	$ 110,212	$ 195,188
Basic:
Income from continuing operations (in dollars per share)	$ 1.23	$ 1.76	$ 2.39	$ 4.40
Income (loss) from discontinued operations (in dollars per share)	0.00	(0.05)	0.03	(0.06)
Net income (in dollars per share)	1.23	1.71	2.42	4.34
Diluted:
Income from continuing operations (in dollars per share)	1.21	1.70	2.33	4.24
Loss from discontinued operations (in dollars per share)	0.00	(0.05)	0.03	(0.06)
Net income (in dollars per share)	1.21	1.65	2.36	4.18
Dividends per share (in dollars per share)	$ 0.34	$ 0.34	$ 1.02	$ 1.02
Weighted average common shares outstanding
Basic (in shares)	45,851	45,035	45,587	44,975
Diluted (in shares)	46,815	46,587	46,785	46,673