CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Statement [Abstract]
Net revenues	$ 613,584	$ 587,230
Cost of goods sold	268,842	255,960
Gross profit	344,742	331,270
Selling, general and administrative expenses	227,693	215,337
Research and development expenses	27,150	26,027
Restructuring and impairment charges	17,395	3,063
Gain on sale of assets	(2,739)	0
Income from continuing operations before interest and taxes	75,243	86,843
Interest expense	22,692	25,943
Interest income	(339)	(273)
Income from continuing operations before taxes	52,890	61,173
Taxes on income from continuing operations	10,972	6,242
Income from continuing operations	41,918	54,931
Operating income (loss) from discontinued operations	(1,343)	1,235
Benefit on income (loss) from discontinued operations	(322)	(18)
Income (loss) from discontinued operations	(1,021)	1,253
Net income	$ 40,897	$ 56,184
Basic:
Income from continuing operations (in dollars per share)	$ 0.91	$ 1.21
Income (loss) from discontinued operations (in dollars per share)	(0.02)	0.03
Net income (in dollars per share)	0.89	1.24
Diluted:
Income from continuing operations (in dollars per share)	0.89	1.18
Loss from discontinued operations (in dollars per share)	(0.02)	0.02
Net income (in dollars per share)	$ 0.87	$ 1.20
Weighted average common shares outstanding
Basic (in shares)	46,050	45,329
Diluted (in shares)	46,942	46,695