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Acquisitions - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jul. 01, 2012
Jun. 30, 2013
Jul. 01, 2012
Business Acquisition [Line Items]        
Aggregate segment operating loss $ 63,751,000 $ 64,722,000 $ 113,155,000 $ (205,656,000)
2012 Acquisitions
        
Business Acquisition [Line Items]        
Fair value of the consideration at the date of acquisition 422,200,000   422,200,000  
Initial payment of Fair value     367,900,000  
Estimated fair value of the consideration to be paid to former security holders 55,800,000   55,800,000  
Working capital adjustment related to acquisition 1,500,000   1,500,000  
Contingent consideration arrangement, low 2,000,000   2,000,000  
Contingent consideration arrangement, high 90,000,000   90,000,000  
2013 Acquisitions
        
Business Acquisition [Line Items]        
Fair value of the consideration at the date of acquisition 38,500,000   38,500,000  
Transaction expenses 400,000   500,000  
Aggregate segment operating loss 2,900,000   2,900,000  
Liability related to post-closing obligations $ 2,800,000   $ 2,800,000  
2013 Acquisitions | Intellectual property
        
Business Acquisition [Line Items]        
Useful life of intangible assets acquired, years     10 years  
2013 Acquisitions | Customer Lists
        
Business Acquisition [Line Items]        
Useful life of intangible assets acquired, years     15 years  
Minimum | 2013 Acquisitions | Trade Names
        
Business Acquisition [Line Items]        
Useful life of intangible assets acquired, years     1 year  
Maximum | 2013 Acquisitions | Trade Names
        
Business Acquisition [Line Items]        
Useful life of intangible assets acquired, years     10 years