Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands		Jun. 29, 2019	Sep. 29, 2018
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross		$ 544,566	$ 534,939
Accumulated amortization		(401,962)	(359,756)
Other intangible assets, net		142,604	175,183
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	[1]	507,159	499,432
Accumulated amortization		(370,965)	(330,571)
Non-compete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross	[1]	35,440	33,540
Accumulated amortization		(29,579)	(27,836)
Other [Member]
Finite Lived Intangible Assets [Line Items]
Other intangible assets, gross		1,967	1,967
Accumulated amortization		$ (1,418)	$ (1,349)

[1] Reflects the impact from acquisitions (See Note 4).