Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012	Dec. 31, 2012
Business Acquisition [Line Items]
Revenue	$ 413,796,000	$ 368,054,000	$ 1,245,732,000	$ 1,131,953,000
Operating profit	66,042,000	49,841,000	179,197,000	(155,815,000)
Goodwill	1,241,393,000		1,241,393,000		1,249,456,000
Contingent consideration payments			16,367,000	6,930,000
2013 Acquisitions
Business Acquisition [Line Items]
Fair value of the consideration at the date of acquisition	38,500,000		38,500,000
Transaction expenses	100,000		700,000
Revenue	1,200,000		1,200,000
Operating profit	200,000
Liability related to post-closing obligations			2,800,000
Goodwill	9,600,000		9,600,000
2013 Acquisitions | Intellectual property
Business Acquisition [Line Items]
Useful life of intangible assets acquired, years			10 years
Intangible assets	2,200,000		2,200,000
2013 Acquisitions | Customer Lists
Business Acquisition [Line Items]
Useful life of intangible assets acquired, years			16 years
Intangible assets	8,400,000		8,400,000
2013 Acquisitions | Trade Names
Business Acquisition [Line Items]
Intangible assets	1,100,000		1,100,000
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
Intangible assets	227,500,000		227,500,000
Goodwill	152,800,000		152,800,000
Contingent consideration payments			26,000,000
Contingent consideration arrangement, low	0		0
Contingent consideration arrangement, high	$ 62,000,000		$ 62,000,000
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