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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Foreign Operations And Related Derivative Financial Instruments) (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 28, 2018 | Sep. 29, 2017 | Sep. 30, 2016
Foreign Currencies [Line Items] |  |  |
Currency gains from transactions | $ 1,985 | $ 903 |
Currency losses from transactions |  |  | $ 277
Percent of revenues in foreign currency | 16.00% |  |
Euro |  |  |
Foreign Currencies [Line Items] |  |  |
Percent of revenues in foreign currency | 7.00% |  |
Canadian Dollars |  |  |
Foreign Currencies [Line Items] |  |  |
Percent of revenues in foreign currency | 6.00% |  |
Various other foreign currencies |  |  |
Foreign Currencies [Line Items] |  |  |
Percent of revenues in foreign currency | 3.00% |  |

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 + Details
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