Business Acquisition (Fair Values Assigned To The Assets And Liabilities Assumed) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jul. 01, 2017	Oct. 01, 2016	Jul. 05, 2016	Oct. 03, 2015
Business Acquisition [Line Items]
Goodwill	$ 369,762		$ 369,700		$ 27,677
PCB Group, Inc [Member]
Business Acquisition [Line Items]
Accounts receivable				$ 21,008
Inventories				57,981
Prepaid expenses and other current assets				2,362
Property and equipment				19,649
Intangible assets		$ 248,900
Other long-term assets				1,796
Total identifiable assets acquired				351,696
Accounts payable				(6,786)
Accrued payroll and related costs				(7,137)
Non-current deferred tax liability				(94,141)
Other accrued and long-term liabilities				(5,037)
Total identifiable liabilities acquired				(113,101)
Net identifiable assets acquired				238,595
Goodwill		$ 343,178		343,178
Total estimated purchase price consideration, net of cash acquired				581,773
Customer Lists [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Intangible assets				153,900
Trademarks and Trade Names [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Intangible assets				58,500
Technology [Member]
Business Acquisition [Line Items]
Intangible assets				35,300
Land-use rights [Member] | PCB Group, Inc [Member]
Business Acquisition [Line Items]
Intangible assets				$ 1,200