Reportable Segments - Reportable Segments Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018	Sep. 29, 2018
Net sales	$ 789,051	$ 698,651	$ 1,554,595	$ 1,375,945
Operating income (loss):	33,174	17,315	70,125	48,872
Interest expense	(3,145)	(3,547)	(5,394)	(7,272)
Interest income	440	1,426	965	2,981
Miscellaneous, net	(1,773)	(477)	(2,885)	(823)
Income before income taxes	28,696	14,717	62,811	43,758
Total assets	2,000,851		2,000,851		$ 1,932,642
Elimination of inter-segment sales
Net sales	(29,702)	(27,501)	(68,435)	(59,205)
Corporate
Operating income (loss):	(29,627)	(42,947)	(59,933)	(71,324)
Corporate and eliminations
Total assets	84,411		84,411		155,544
AMER | Operating Segments
Net sales	364,490	301,835	718,357	600,878
Operating income (loss):	14,230	10,702	28,680	21,225
Total assets	733,925		733,925		645,791
APAC | Operating Segments
Net sales	378,441	350,375	756,553	696,498
Operating income (loss):	48,704	49,171	100,515	99,703
Total assets	980,888		980,888		937,510
EMEA | Operating Segments
Net sales	75,822	73,942	148,120	137,774
Operating income (loss):	(133)	$ 389	863	$ (732)
Total assets	$ 201,627		$ 201,627		$ 193,797