Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014	Jan. 03, 2015
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill	$ 798,700,000		$ 798,700,000		$ 810,700,000
Goodwill acquired			11,100,000
Accumulated impairment losses	0		$ 0
Weighted-average amortization period (in years)			11 years
Aggregate amortization expense	6,000,000	$ 6,100,000	$ 18,400,000	$ 18,400,000
Estimated annual amortization expense for fiscal period 2015	24,600,000		24,600,000
Estimated annual amortization expense for fiscal period 2016	21,200,000		21,200,000
Estimated annual amortization expense for fiscal period 2017	18,100,000		18,100,000
Estimated annual amortization expense for fiscal period 2018	14,900,000		14,900,000
Estimated annual amortization expense for fiscal period 2019	13,600,000		13,600,000
Estimated annual amortization expense for fiscal period 2020	$ 12,000,000		$ 12,000,000
Customer relationships [Member]
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted-average amortization period (in years)			15 years
Customer relationship contractual term, minimum (in years)			3 years
Customer relationship contractual term, maximum (in years)			5 years