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BALANCE SHEET COMPONENTS (Components of significant balance sheet accounts) (Details) - USD ($) $ in Thousands | Mar. 30, 2024 | Sep. 30, 2023
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Short-term investments | $ 275,000 | $ 230,000
Inventories, net: |  |
Raw materials and supplies | 117,797 | 114,827
Work in process | 63,046 | 74,555
Finished goods | 54,804 | 49,207
Inventory, gross | 235,647 | 238,589
Inventory reserves(1) | (55,106) | (21,285)
Inventories, net | 180,541 | 217,304
Property, plant and equipment, net: |  |
Land | 2,182 | 2,182
Buildings and building improvements | 23,184 | 23,105
Leasehold improvements | 84,987 | 82,927
Data processing equipment and software | 39,709 | 37,483
Machinery, equipment, furniture and fixtures | 100,336 | 95,692
Construction in progress | 11,072 | 11,099
Property, plant and equipment, gross | 261,470 | 252,488
Accumulated depreciation | (154,960) | (142,437)
Accumulated impairment | (41,507) | 0
Property, plant and equipment, net | 65,003 | 110,051
Accrued expenses and other current liabilities: |  |
Accrued customer obligations | 32,399 | 35,701
Wages and benefits(1) | 24,420 | 33,096
Dividends payable | 11,164 | 10,710
Commissions and professional fees | 4,398 | 4,091
Accrued leasehold renovations | 7,613 | 11,005
Other | 10,132 | 8,402
Accrued expenses and other current liabilities | $ 90,126 | $ 103,005

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