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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (New Accounting Pronouncements) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 29, 2017	Sep. 29, 2017	Sep. 30, 2016	Oct. 02, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating expenses		$ (165,349)	$ (153,568)	$ (153,880)
Other expenses		$ (3,060)	$ (1,407)	$ 1,299
Accounting Standards Update 2017-07 | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating expenses	$ 500
Other expenses	$ 500

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.9)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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