4. Schedule of investment gains/losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Jul. 04, 2012	Jul. 06, 2011	Jul. 04, 2012	Jul. 06, 2011
Notes to Financial Statements
Gross realized gains on sales	$ 227	$ 1,444	$ 4,584	$ 4,694
Gross realized losses on sales		$ (11)	$ (384)	$ (17)

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 21

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration