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INCOME TAXES (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015 | Sep. 27, 2014
Income Tax Disclosure [Abstract] |  |  |  |
Change in permanent reinvestment assertion | $ 0 | $ (9,696) | $ (19,704) |
Tax impact on restructuring | 0 | 4,238 | 0 |
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries | 619,900 |  |  |
Deferred Tax Liabilities, Undistributed Foreign Earnings | 21,000 |  |  |
Undistributed Earnings Not Reinvested In Foreign Operations | 500 |  |  |
Foreign Earnings Repatriated | 200 |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 95,800 |  |  |
Deferred Tax Assets, Tax Credit Carryforwards | 4,900 |  |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 11,200 |  |  |
Excess tax benefits from stock based compensation | (4,392) | 197 | 540 |
Operating Loss Carryforwards [Line Items] |  |  |  |
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions | 882 | 994 | 5,231 |
Unrecognized Tax Benefits | 12,062 | 7,453 | 7,101 | $ 7,192
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 165,800 |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 24,300 |  |  |
Operations In Singapore And Malaysia [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Income Tax Reconciliation, Tax Exempt Income | $ 21,600 | $ 8,500 | $ 5,900 |
Income Tax Reconciliation Foreign Income Tax Rate Differential Per Share | $ 0.30 | $ 0.12 | $ 0.08 |
Minimum [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating Loss Carryforward, Foreign, Statute Of Limitions | 4 years |  |  |
Minimum [Member] | Operations In Singapore And Malaysia [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential |  |  | 0.00% |
Maximum [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating Loss Carryforward, Foreign, Statute Of Limitions | 6 years |  |  |
Maximum [Member] | Operations In Singapore And Malaysia [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential | 5.00% |  |  |
Pennsylvania Tax Law [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | $ 5,000 | $ 0 | $ 4,000 | $ 4,000

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