Note 10 Revenue and Gross Profit by Segment (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2018 USD ($)	Apr. 01, 2017 USD ($)	Mar. 31, 2018 USD ($)	Apr. 01, 2017 USD ($)
Segment Reporting Information [Line Items]
Net sales		$ 1,675,629	$ 1,682,262	$ 3,420,429	$ 3,402,239
Gross profit		114,698	133,210	$ 224,164	265,372
Number of Reportable Segments				1
Operating Segments
Segment Reporting Information [Line Items]
Gross profit		117,288	136,147	$ 229,771	272,073
Operating Segments | IMS
Segment Reporting Information [Line Items]
Net sales		1,374,581	1,382,437	2,803,428	2,796,707
Gross profit		85,916	100,644	168,533	203,281
Operating Segments | CPS
Segment Reporting Information [Line Items]
Net sales		345,732	349,637	702,461	700,711
Gross profit		31,372	35,503	61,238	68,792
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales		(44,684)	(49,812)	(85,460)	(95,179)
Unallocated items (1)
Segment Reporting Information [Line Items]
Gross profit	[1]	$ (2,590)	$ (2,937)	$ (5,607)	$ (6,701)

[1] For purposes of evaluating segment performance, management excludes certain items from its measure of gross profit. These items consist of stock-based compensation expense, amortization of intangible assets, charges or credits resulting from distressed customers and acquisition-related items.