Other Identifiable Intangible Assets - Other Identifiable Intangible Assets Acquired (Detail) - USD ($) $ in Thousands	Oct. 02, 2016	Sep. 27, 2015
Total YTD 2016 Expansion Transactions [Member]
Finite Lived Intangible Assets [Line Items]
Total other acquired identifiable intangible assets	$ 24,750
Total YTD 2015 Expansion Transactions [Member]
Finite Lived Intangible Assets [Line Items]
Total other acquired identifiable intangible assets		$ 36,100
Distribution Agreements [Member] | Total YTD 2016 Expansion Transactions [Member]
Finite Lived Intangible Assets [Line Items]
Total other acquired identifiable intangible assets	22,750
Distribution Agreements [Member] | Total YTD 2015 Expansion Transactions [Member]
Finite Lived Intangible Assets [Line Items]
Total other acquired identifiable intangible assets		33,400
Customer Lists and Other Identifiable Intangible Assets [Member] | Total YTD 2016 Expansion Transactions [Member]
Finite Lived Intangible Assets [Line Items]
Total other acquired identifiable intangible assets	$ 2,000
Customer Lists and Other Identifiable Intangible Assets [Member] | Total YTD 2015 Expansion Transactions [Member]
Finite Lived Intangible Assets [Line Items]
Total other acquired identifiable intangible assets		$ 2,700