CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Income Statement [Abstract]
Net revenues	$ 452,045	$ 468,105	$ 881,475	$ 906,651
Cost of goods sold	218,808	224,017	425,601	441,404
Gross profit	233,237	244,088	455,874	465,247
Selling, general and administrative expenses	142,228	146,843	281,925	287,140
Research and development expenses	13,443	14,870	26,327	28,932
Restructuring and impairment charges	580	7,623	5,028	15,403
Income from continuing operations before interest, extinguishment of debt and taxes	76,986	74,752	142,594	133,772
Interest expense	16,207	16,062	33,379	31,466
Interest income	(154)	(146)	(323)	(333)
Loss on extinguishment of debt, net	10,454	0	10,454	0
Income from continuing operations before taxes	50,479	58,836	99,084	102,639
Taxes on income from continuing operations	5,280	10,006	14,612	18,540
Income from continuing operations	45,199	48,830	84,472	84,099
Operating loss from discontinued operations	(145)	(1,594)	(644)	(1,619)
Taxes (benefit) on loss from discontinued operations	45	(469)	249	(369)
Loss from discontinued operations	(190)	(1,125)	(893)	(1,250)
Net income	45,009	47,705	83,579	82,849
Less: Income from continuing operations attributable to noncontrolling interest	446	453	664	639
Net income attributable to common shareholders	$ 44,563	$ 47,252	$ 82,915	$ 82,210
Basic:
Income from continuing operations (in dollars per share)	$ 1.08	$ 1.17	$ 2.02	$ 2.02
Loss from discontinued operations (in dollars per share)	(0.01)	(0.03)	(0.02)	(0.03)
Net income (in dollars per share)	1.07	1.14	2.00	1.99
Diluted:
Income from continuing operations (in dollars per share)	0.93	1.04	1.76	1.81
Loss from discontinued operations (in dollars per share)	0.00	(0.02)	(0.02)	(0.03)
Net income (in dollars per share)	0.93	1.02	1.74	1.78
Dividends per share (in dollars per share)	$ 0.34	$ 0.34	$ 0.68	$ 0.68
Weighted average common shares outstanding
Basic (in shares)	41,560	41,380	41,514	41,321
Diluted (in shares)	48,081	46,392	47,688	46,071
Amounts attributable to common shareholders:
Income from continuing operations, net of tax	$ 44,753	$ 48,377	$ 83,808	$ 83,460
Loss from discontinued operations, net of tax	(190)	(1,125)	(893)	(1,250)
Net income attributable to common shareholders	$ 44,563	$ 47,252	$ 82,915	$ 82,210