Fair Value of Financial Instruments (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
The gross components of purchases, sales, and settlements, net, of Level 3 financial instruments
Purchases	$ 262,536		$ 406,410
Sales	(8,188)		(24,873)
Settlements	(13,113)	(11,882)	(45,725)	(11,882)
Net Purchases, Sales & Settlements	241,235	(11,882)	335,812	(11,882)
Net Purchases, Sales & Settlements		(85,700)		(85,700)
Equity conversion feature of preferred stock [Member]
The gross components of purchases, sales, and settlements, net, of Level 3 financial instruments
Sales		(85,700)		(85,700)
Net Purchases, Sales & Settlements		(85,700)		(85,700)
Non-agency residential mortgage-backed securities [Member]
The gross components of purchases, sales, and settlements, net, of Level 3 financial instruments
Sales	(475)		(475)
Settlements	(88)	(1,119)	(302)	(1,119)
Net Purchases, Sales & Settlements	(563)	(1,119)	(777)	(1,119)
Asset-backed Securities [Member]
The gross components of purchases, sales, and settlements, net, of Level 3 financial instruments
Purchases	262,536		394,887
Settlements	(10,991)	(8,128)	(31,811)	(8,128)
Net Purchases, Sales & Settlements	251,545	(8,128)	363,076	(8,128)
Corporates [Member]
The gross components of purchases, sales, and settlements, net, of Level 3 financial instruments
Purchases			1,326
Sales	(7,713)		(24,398)
Settlements	(2,034)	(2,635)	(13,592)	(2,635)
Net Purchases, Sales & Settlements	(9,747)	(2,635)	(36,664)	(2,635)
Municipals [Member]
The gross components of purchases, sales, and settlements, net, of Level 3 financial instruments
Purchases			10,197
Settlements			(20)
Net Purchases, Sales & Settlements			$ 10,177

Purchases that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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- Definition

Amount of purchases, sales, issues, and settlements (net) which have taken place in relation to assets measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(2)

-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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Sales that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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Amount of purchases, sales, issues, and settlements in relation to liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).

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Sales that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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