CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Income Statement [Abstract]
Net revenues	$ 424,893	$ 429,430
Cost of goods sold	199,746	206,793
Gross profit	225,147	222,637
Selling, general and administrative expenses	136,348	139,697
Research and development expenses	12,353	12,884
Restructuring charges	9,968	4,448
Gain on sale of assets	(1,019)	0
Income from continuing operations before interest and taxes	67,497	65,608
Interest expense	13,784	17,172
Interest income	(80)	(169)
Income from continuing operations before taxes	53,793	48,605
Taxes on income from continuing operations	2,613	9,332
Income from continuing operations	51,180	39,273
Operating loss from discontinued operations	(382)	(499)
(Benefit) taxes on loss from discontinued operations	(70)	204
Loss from discontinued operations	(312)	(703)
Net income	50,868	38,570
Less: Income from continuing operations attributable to noncontrolling interest	179	218
Net income attributable to common shareholders	$ 50,689	$ 38,352
Basic:
Income from continuing operations (in dollars per share)	$ 1.22	$ 0.94
Loss from discontinued operations (in dollars per share)	0.00	(0.02)
Net income (in dollars per share)	1.22	0.92
Diluted:
Income from continuing operations (in dollars per share)	1.05	0.83
Loss from discontinued operations (in dollars per share)	(0.01)	(0.02)
Net income (in dollars per share)	1.04	0.81
Dividends per share (in dollars per share)	$ 0.34	$ 0.34
Weighted average common shares outstanding
Basic (in shares)	41,647	41,469
Diluted (in shares)	48,782	47,295
Amounts attributable to common shareholders:
Income from continuing operations, net of tax	$ 51,001	$ 39,055
Loss from discontinued operations, net of tax	(312)	(703)
Net income attributable to common shareholders	$ 50,689	$ 38,352