Reportable Segments, Geographic Information and Major Customers - Net Sales and Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Net sales	$ 669,852	$ 618,832	$ 604,349	$ 635,019	$ 653,064	$ 667,616	$ 618,660	$ 616,664	$ 2,528,052	$ 2,556,004	$ 2,654,290
Long-lived assets	314,665				291,225				314,665	291,225
Operating Segments | United States
Net sales									984,773	1,134,342	1,303,106
Long-lived assets	110,828				92,152				110,828	92,152
Operating Segments | Malaysia
Net sales									940,045	844,501	926,059
Long-lived assets	74,769				71,596				74,769	71,596
Operating Segments | China
Net sales									339,216	317,350	359,846
Long-lived assets	18,602				19,197				18,602	19,197
Operating Segments | Mexico
Net sales									181,573	194,418	85,911
Long-lived assets	37,237				39,155				37,237	39,155
Operating Segments | Romania
Net sales									114,363	83,712	65,338
Long-lived assets	33,717				30,408				33,717	30,408
Operating Segments | United Kingdom
Net sales									70,163	81,894	70,335
Long-lived assets	6,456				6,594				6,456	6,594
Operating Segments | Germany
Net sales									8,303	4,844	4,619
Long-lived assets	303				307				303	307
Operating Segments | Other Foreign
Long-lived assets	5,126				4,940				5,126	4,940
Elimination of inter-segment sales
Net sales									(110,384)	(105,057)	$ (160,924)
Corporate
Long-lived assets	$ 27,627				$ 26,876				$ 27,627	$ 26,876