Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 25, 2017	Sep. 24, 2016
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	$ 529,145	$ 529,145
Accumulated amortization	(281,079)	(252,816)
Other intangible assets, net	248,066	276,329
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	492,656	492,656
Accumulated amortization	(252,471)	(225,634)
Non-compete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	31,040	31,040
Accumulated amortization	(23,913)	(22,533)
Tradenames [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	3,482	3,482
Accumulated amortization	(3,482)	(3,482)
Other [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	1,967	1,967
Accumulated amortization	$ (1,213)	$ (1,167)