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Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment (Details 2) (USD $)			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Current marketable investment securities - VRDNs day	Jun. 30, 2012 ARS and MBS, noncurrent	Dec. 31, 2011 ARS and MBS, noncurrent	Jun. 30, 2012 Current marketable investment securities - strategic	Dec. 31, 2011 Current marketable investment securities - strategic
Other investment securities:
Settlement period (in days)			5
ARS and MBS investments, total carrying value	$ 103,639,000	$ 109,327,000		$ 104,000,000
ARS and MBS investments, portion for which the fair value election was made				57,858,000	62,670,000
Carrying value of debt securities of a single issuer						396,000,000	16,000,000
Fair value of debt securities of a single issuer						$ 393,000,000	$ 17,000,000

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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