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Marketable Investment Securities, Restricted Cash and Other Investment Securities (Details 3) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Fair value of marketable investment securities in a loss position
Total	$ 320,499	$ 119,135
Less than Six Months	316,580	26,358
Six to Nine Months		17,566
Nine Months or More	3,919	75,211
Unrealized loss on marketable investment securities in a loss position
Less than Six Months	(2,962)	(44)
Six to Nine Months		(71)
Nine Months or More	(11)	(118)
Debt securities
Fair value of marketable investment securities in a loss position
Total	320,499	119,135
Less than Six Months	316,580	26,358
Six to Nine Months		17,566
Nine Months or More	3,919	75,211
Unrealized loss on marketable investment securities in a loss position
Less than Six Months	(2,962)	(44)
Six to Nine Months		(71)
Nine Months or More	$ (11)	$ (118)

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- Definition

Available-for-sale securities continuous unrealized loss position less Than six months aggregate losses.

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 03-1

-Paragraph 21

-Subparagraph a(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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 17

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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-Section 50

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