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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Research And Development) (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 29, 2017 | Sep. 30, 2016 | Oct. 02, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross amount capitalized related to software development | $ 34,528 | $ 31,572 |
Accumulated amortization | $ 18,040 | 14,597 |
Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life (years) | 4 years |  |
Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life (years) | 15 years |  |
Computer Software, Intangible Asset |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization expense related to capitalized software | $ 3,444 | $ 2,738 | $ 2,535
Computer Software, Intangible Asset | Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life (years) | 3 years |  |
Computer Software, Intangible Asset | Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life (years) | 7 years |  |

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