v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Income Taxes [Line Items]      
Tax and accrued interest related to uncertain tax positions $ (0.3) $ 1.7 $ (0.9)
Effective tax rate 26.40% 26.10% 26.00%
Operating loss carryforwards, gross 0.2    
Indefinitely carryforward research and development credits 2.7    
Investment Tax Credit 0.5    
Estimated income tax benefit 0.6    
Deferred Tax Assets, Tax Credit Carryforwards, Research 0.9    
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax 0.2    
Foreign Tax Expense (Benefit), Business and Employment Actions 1.2 1.2  
Earnings Per Share, Diluted, Effect of Foreign Tax Benefit Relating to Business and Employment Actions $ 0.02 $ 0.02  
Tax benefit from stock options exercised 0.7 0.4 1.7
Deferred income taxes 57.4    
Additional income tax expense 17.6    
Amount of unrecognized benefits affecting future tax rate 5.6 5.7  
Penalties and interest related to unrecognized tax benefits 0.9 0.8 0.7
Sweden
      
Income Taxes [Line Items]      
Net operating loss carryforwards 1.3    
Cercacor Laboratories, Inc
      
Income Taxes [Line Items]      
Change in deferred tax asset 2.3    
Research Tax Credit Carryforward
      
Income Taxes [Line Items]      
Research and development tax credit $ 1.0