CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Income Statement [Abstract]
Net revenues	$ 609,866	$ 528,613	$ 1,197,096	$ 1,016,494
Cost of goods sold	265,088	238,329	521,048	470,650
Gross profit	344,778	290,284	676,048	545,844
Selling, general and administrative expenses	229,917	158,934	445,254	322,903
Research and development expenses	26,018	20,278	52,045	38,105
Restructuring and impairment charges	55,353	870	58,416	13,815
Income from continuing operations before interest, loss on extinguishment of debt and taxes	33,490	110,202	120,333	171,021
Interest expense	26,649	19,894	52,592	37,620
Interest income	(183)	(161)	(456)	(330)
Loss on extinguishment of debt	0	11	0	5,593
Income from continuing operations before taxes	7,024	90,458	68,197	128,138
Taxes on income from continuing operations	9,576	12,095	15,818	9,426
Income from continuing operations	(2,552)	78,363	52,379	118,712
Operating income (loss) from discontinued operations	94	(566)	1,329	(848)
Tax (benefit) on income (loss) from discontinued operations	38	(206)	20	(309)
Income (loss) from discontinued operations	56	(360)	1,309	(539)
Net income	$ (2,496)	$ 78,003	$ 53,688	$ 118,173
Basic:
Income from continuing operations (in dollars per share)	$ (0.06)	$ 1.74	$ 1.15	$ 2.64
Income (loss) from discontinued operations (in dollars per share)	0.01	(0.01)	0.03	(0.01)
Net income (in dollars per share)	(0.05)	1.73	1.18	2.63
Diluted:
Income from continuing operations (in dollars per share)	(0.06)	1.67	1.12	2.54
Loss from discontinued operations (in dollars per share)	0.01	0.00	0.03	(0.01)
Net income (in dollars per share)	(0.05)	1.67	1.15	2.53
Dividends per share (in dollars per share)	$ 0.34	$ 0.34	$ 0.68	$ 0.68
Weighted average common shares outstanding
Basic (in shares)	45,581	44,996	45,455	44,945
Diluted (in shares)	45,581	46,818	46,771	46,716