Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 08, 2015
Business Acquisition [Line Items]
Business Combination, Consideration Transferred, Liabilities Incurred									$ 1,800
Estimated fair value of contingent consideration	$ 20,829				$ 33,433				20,829	$ 33,433
Revenue	484,501	$ 443,714	$ 452,045	$ 429,430	476,008	$ 457,173	$ 468,105	$ 438,546	1,809,690	1,839,832	$ 1,696,271
Segment operating profit	96,747	$ 76,550	$ 76,986	$ 65,608	69,155	$ 81,935	$ 74,752	$ 59,020	315,891	284,862	$ 233,261
2014 Acquisition
Business Acquisition [Line Items]
Fair value of the consideration at the date of acquisition					$ 66,300					$ 66,300
Truphatek
Business Acquisition [Line Items]
Noncontrolling interest held												6.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value									1,200
Working capital adjustment									300
Transaction expenses									1,300
Business Combinations 2015
Business Acquisition [Line Items]
Net assets acquired	$ 96,473								96,473
Initial payment									93,800
Revenue									20,900
Segment operating profit									$ 6,900
Minimum | Intellectual property
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									3 years
Minimum | Customer Lists
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									5 years
Minimum | Distribution rights
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									3 years
Minimum | Trade names
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									1 year
Minimum | Business Combinations 2015 | Intellectual property
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									15 years
Minimum | Business Combinations 2015 | Customer Lists
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									10 years
Minimum | Business Combinations 2015 | Distribution rights
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									10 years
Minimum | Business Combinations 2015 | Noncompete agreements
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									5 years
Maximum | Intellectual property
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									20 years
Maximum | Customer Lists
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									30 years
Maximum | Distribution rights
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									22 years
Maximum | Trade names
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									30 years
Maximum | Business Combinations 2015 | Intellectual property
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									20 years
Maximum | Business Combinations 2015 | Customer Lists
Business Acquisition [Line Items]
Useful life of Intangible assets, in years									18 years