Segment and Geographic Information - Schedule of sales by geographic regions (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Geographic information [Line Items]
Net sales	$ 384,507	$ 326,053
United States
Geographic information [Line Items]
Net sales	90,537	71,527
Total foreign countries sales
Geographic information [Line Items]
Net sales	293,970	254,526
South Korea
Geographic information [Line Items]
Net sales	60,638	71,838
China
Geographic information [Line Items]
Net sales	70,845	61,459
Japan
Geographic information [Line Items]
Net sales	39,095	23,339
Asia-Pacific, other
Geographic information [Line Items]
Net sales	37,723	27,411
Germany
Geographic information [Line Items]
Net sales	34,839	29,285
Europe, other
Geographic information [Line Items]
Net sales	35,828	28,531
Rest of World
Geographic information [Line Items]
Net sales	$ 15,002	$ 12,663