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Note P - Accumulated Other Comprehensive Loss - Changes to the Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 24, 2016
Balance	$ 637,974	$ 599,919
Balance	682,322	637,974
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(13,086)	(10,021)
Other comprehensive loss before reclassifications	3,745	(3,065)
Amounts reclassified from accumulated other comprehensive income	0	0
Balance	(9,341)	(13,086)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Balance	(329)	(876)
Other comprehensive loss before reclassifications	795	(8)
Amounts reclassified from accumulated other comprehensive income	0	555
Balance	466	(329)
AOCI Attributable to Parent [Member]
Balance	(13,415)	(10,897)
Other comprehensive loss before reclassifications	4,540	(3,073)
Amounts reclassified from accumulated other comprehensive income	0	555
Balance	$ (8,875)	$ (13,415)

X

- Definition

Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

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- Definition

Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 310
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

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