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BALANCE SHEET COMPONENTS (Components of significant balance sheet accounts) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Oct. 01, 2022
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Short-term investments | $ 230,000 | $ 220,000
Inventories, net: |  |
Raw materials and supplies | 114,827 | 118,833
Work in process | 74,555 | 40,114
Finished goods | 49,207 | 45,277
Inventory, gross | 238,589 | 204,224
Inventory reserves | (21,285) | (19,238)
Inventories, net | 217,304 | 184,986
Property, plant and equipment, net: |  |
Land | 2,182 | 2,182
Buildings and building improvements | 23,105 | 22,783
Leasehold improvements | 82,927 | 32,400
Data processing equipment and software | 37,483 | 38,223
Machinery, equipment, furniture and fixtures | 95,692 | 90,151
Construction in progress | 11,099 | 25,004
Property, plant and equipment, gross | 252,488 | 210,743
Accumulated depreciation | (142,437) | (129,835)
Property, plant and equipment, net | 110,051 | 80,908
Accrued expenses and other current liabilities: |  |
Accrued customer obligations | 35,701 | 58,916
Wages and benefits | 33,096 | 50,279
Commissions and professional fees | 4,091 | 5,019
Dividends payable | 10,710 | 9,743
Accrued leasehold renovations | 11,005 | 0
Other | 8,402 | 10,584
Accrued expenses and other current liabilities | $ 103,005 | $ 134,541

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