Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 26, 2015	Sep. 27, 2014
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	$ 505,093	$ 499,223
Accumulated amortization	(197,304)	(139,930)
Other intangible assets, net	307,789	359,293
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	471,829	466,959
Accumulated amortization	(173,823)	(122,411)
Non-compete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	27,815	26,815
Accumulated amortization	(19,337)	(13,962)
Tradenames [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	3,482	3,482
Accumulated amortization	(3,069)	(2,573)
Other [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	1,967	1,967
Accumulated amortization	$ (1,075)	$ (984)