Marketable Investment Securities, Restricted Cash and Other Investment Securities (Details 4) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Fair value of marketable investment securities in a loss position
Less than Six Months	$ 629,662	$ 119,962
Six to Nine Months	1,596	26,182
Nine Months or More	59,961	193,603
Total	691,219	339,747
Unrealized loss on marketable investment securities in a loss position
Less than Six Months	(4,490)	(8,603)
Six to Nine Months	(2)	(103)
Nine Months or More	(11,989)	(13,661)
Debt securities
Fair value of marketable investment securities in a loss position
Less than Six Months	489,729	93,072
Six to Nine Months	1,596	26,182
Nine Months or More	59,961	193,603
Total	551,286	312,857
Unrealized loss on marketable investment securities in a loss position
Less than Six Months	(1,536)	(174)
Six to Nine Months	(2)	(103)
Nine Months or More	(11,989)	(13,661)
Equity securities
Fair value of marketable investment securities in a loss position
Less than Six Months	139,933	26,890
Total	139,933	26,890
Unrealized loss on marketable investment securities in a loss position
Less than Six Months	$ (2,954)	$ (8,429)

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-Publisher FASB
-Name Emerging Issues Task Force (EITF)
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