Business Acquisition (Purchase Price Schedule) (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 05, 2016	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Business Acquisition [Line Items]
Total purchase price consideration, net of cash acquired		$ 580,920	$ 667	$ 14,192
PCB Group, Inc [Member]
Business Acquisition [Line Items]
Consideration paid to PCB shareholders and employees1	$ 580,000
Consideration for PCB closing cash	11,612
Deferred endowment consideration	1,000
Net pre-acquisition earn-out	(141)
Net working capital adjustment	(513)
Cash acquired	(10,551)
Total purchase price consideration, net of cash acquired	581,407
Employees [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Consideration paid to PCB shareholders and employees1	$ 10,000