Note 11 Revenue and Gross Profit by Segment (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 30, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 30, 2019 USD ($)	Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Net sales		$ 2,126,639	$ 1,675,629	$ 4,314,657	$ 3,420,429
Gross profit		153,102	114,698	$ 302,439	224,164
Number of Reportable Segments				1
Operating Segments
Segment Reporting Information [Line Items]
Gross profit		155,129	117,288	$ 306,304	229,771
Operating Segments | IMS
Segment Reporting Information [Line Items]
Net sales		1,793,119	1,374,581	3,586,301	2,803,428
Gross profit		114,837	85,916	225,493	168,533
Operating Segments | CPS
Segment Reporting Information [Line Items]
Net sales		394,985	345,732	850,788	702,461
Gross profit		40,292	31,372	80,811	61,238
Intersegment revenue
Segment Reporting Information [Line Items]
Net sales		(61,465)	(44,684)	(122,432)	(85,460)
Unallocated items
Segment Reporting Information [Line Items]
Gross profit	[1]	$ (2,027)	$ (2,590)	$ (3,865)	$ (5,607)

[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 and charges or credits resulting from distressed customers.