CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net revenues	$ 630,642	$ 613,584
Cost of goods sold	297,018	289,614
Gross profit	333,624	323,970
Selling, general and administrative expenses	147,796	206,921
Research and development expenses	27,396	27,150
Restructuring and impairment charges	1,346	17,395
Gain on sale of assets	0	(2,739)
Income from continuing operations before interest and taxes	157,086	75,243
Interest expense	15,439	22,692
Interest income	(579)	(339)
Income from continuing operations before taxes	142,226	52,890
Taxes on income from continuing operations	11,074	10,972
Income from continuing operations	131,152	41,918
Operating loss from discontinued operations	(4)	(1,343)
Tax benefit on operating loss from discontinued operations	(2)	(322)
Loss from discontinued operations	(2)	(1,021)
Net income	$ 131,150	$ 40,897
Basic:
Income from continuing operations (in dollars per share)	$ 2.83	$ 0.91
Income (loss) from discontinued operations (in dollars per share)	0	(0.02)
Net income (in dollars per share)	2.83	0.89
Diluted:
Income from continuing operations (in dollars per share)	2.78	0.89
Loss from discontinued operations (in dollars per share)	0	(0.02)
Net income (in dollars per share)	$ 2.78	$ 0.87
Weighted average common shares outstanding
Basic (in shares)	46,382	46,050
Diluted (in shares)	47,231	46,942