CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Income Statement [Abstract]    
Net revenues $ 429,430 $ 438,546
Cost of goods sold 206,793 217,387
Gross profit 222,637 221,159
Selling, general and administrative expenses 139,697 140,297
Research and development expenses 12,884 14,062
Restructuring and impairment charges 4,448 7,780
Income from continuing operations before interest and taxes 65,608 59,020
Interest expense 17,172 15,404
Interest income (169) (187)
Income from continuing operations before taxes 48,605 43,803
Taxes on income from continuing operations 9,332 8,534
Income from continuing operations 39,273 35,269
Operating loss from discontinued operations (499) (25)
Taxes on loss from discontinued operations 204 100
Loss from discontinued operations (703) (125)
Net income 38,570 35,144
Less: Income from continuing operations attributable to noncontrolling interest 218 186
Net income attributable to common shareholders 38,352 34,958
Basic:    
Income from continuing operations (in dollars per share) $ 0.94 $ 0.85
Loss from discontinued operations (in dollars per share) $ (0.02) $ 0.00
Net income (in dollars per share) $ 0.92 $ 0.85
Diluted:    
Income from continuing operations (in dollars per share) $ 0.83 $ 0.77
Loss from discontinued operations (in dollars per share) $ (0.02) $ (0.01)
Net income (in dollars per share) $ 0.81 $ 0.76
Dividends per share (in dollars per share) $ 0.34 $ 0.34
Weighted average common shares outstanding    
Basic (in shares) 41,469 41,262
Diluted (in shares) 47,295 45,749
Amounts attributable to common shareholders:    
Income from continuing operations, net of tax 39,055 35,083
Loss from discontinued operations, net of tax (703) (125)
Net income attributable to common shareholders $ 38,352 $ 34,958