Intangible Assets, Net - Cost and Accumulated Amortization (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Sep. 29, 2018
Finite-Lived Intangible Assets
Cost	$ 343,767	$ 302,463
Accumulated amortization	(95,180)	(76,910)
Total intangibles, net	248,587	225,553
Customer relationships and agreements
Finite-Lived Intangible Assets
Cost	152,965	134,999
Accumulated amortization	(56,618)	(45,418)
Total intangibles, net	96,347	89,581
Software
Finite-Lived Intangible Assets
Cost	86,782	62,147
Accumulated amortization	(16,022)	(14,053)
Total intangibles, net	70,760	48,094
Trademarks and trade names
Finite-Lived Intangible Assets
Cost	57,278	57,513
Accumulated amortization	(6,682)	(5,050)
Total intangibles, net	50,596	52,463
Patents, licenses and rights
Finite-Lived Intangible Assets
Cost	46,742	47,804
Accumulated amortization	(15,858)	(12,389)
Total intangibles, net	$ 30,884	$ 35,415