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BALANCE SHEET COMPONENTS (Components of significant balance sheet accounts) (Details) - USD ($) $ in Thousands	Apr. 02, 2022	Oct. 02, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Short-term investments	$ 230,000	$ 377,000
Inventories, net:
Raw materials and supplies	117,864	94,493
Work in process	70,649	55,866
Finished goods	44,475	40,006
Inventory, gross	232,988	190,365
Inventory reserves	(21,111)	(23,042)
Inventories, net	211,877	167,323
Property, plant and equipment, net:
Land	2,182	2,182
Buildings and building improvements	23,464	23,314
Leasehold improvements	32,057	30,054
Data processing equipment and software	41,419	40,945
Machinery, equipment, furniture and fixtures	93,421	87,994
Construction in progress	8,419	9,562
Property, plant and equipment, gross	200,962	194,051
Accumulated depreciation	(133,918)	(126,069)
Property, plant and equipment, net	67,044	67,982
Accrued expenses and other current liabilities:
Accrued customer obligations (2)	76,245	72,478
Wages and benefits	38,966	66,531
Dividends payable	10,110	8,673
Commissions and professional fees	6,093	6,190
Other	5,229	7,667
Severance	0	31
Accrued expenses and other current liabilities	$ 136,643	$ 161,570

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