Reportable Segments - Reportable Segments Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Sep. 29, 2018
Net sales	$ 799,644	$ 726,385	$ 2,354,239	$ 2,102,330
Operating income (loss):	34,403	32,446	104,528	81,318
Interest expense	(3,711)	(2,910)	(9,105)	(10,182)
Interest income	445	1,068	1,410	4,049
Miscellaneous, net	(1,419)	(1,052)	(4,304)	(1,875)
Income before income taxes	29,718	29,552	92,529	73,310
Total assets	2,016,231		2,016,231		$ 1,932,642
Elimination of inter-segment sales
Net sales	(32,981)	(30,106)	(101,416)	(89,311)
Corporate
Operating income (loss):	(32,604)	(31,464)	(92,537)	(102,789)
Corporate and eliminations
Total assets	77,582		77,582		155,544
AMER | Operating Segments
Net sales	366,466	298,375	1,084,823	899,253
Operating income (loss):	14,221	6,799	42,901	28,025
Total assets	769,891		769,891		645,791
APAC | Operating Segments
Net sales	384,841	383,785	1,141,394	1,080,283
Operating income (loss):	51,264	55,274	151,779	154,977
Total assets	957,685		957,685		937,510
EMEA | Operating Segments
Net sales	81,318	74,331	229,438	212,105
Operating income (loss):	1,522	$ 1,837	2,385	$ 1,105
Total assets	$ 211,073		$ 211,073		$ 193,797