Stockholders' Equity (Details Textual) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended					9 Months Ended		0 Months Ended	1 Months Ended	9 Months Ended			12 Months Ended			0 Months Ended	9 Months Ended								3 Months Ended	9 Months Ended			1 Months Ended	0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Liberty Media [Member]	Sep. 30, 2014 Other Current Assets [Member]	Dec. 31, 2013 Other Current Assets [Member]	Sep. 30, 2014 Related Party Current Assets [Member]	Dec. 31, 2013 Related Party Current Assets [Member]	Sep. 30, 2014 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Jan. 18, 2013 Common Stock [Member] Liberty Media [Member]	Jan. 31, 2013 Common Stock [Member] Liberty Media [Member]	Sep. 30, 2014 Common Stock [Member] Open Market And Privately Negotiated Repurchases [Member]		Sep. 30, 2014 Common Stock [Member] December 2012 Share Repurchase Program [Member]	Dec. 31, 2013 Common Stock [Member] October 2013 Share Repurchase Program [Member] Liberty Media [Member]	Apr. 25, 2014 Common Stock [Member] October 2013 Share Repurchase Program [Member] Liberty Media [Member]	Oct. 09, 2013 Common Stock [Member] October 2013 Share Repurchase Program [Member] Liberty Media [Member]	Apr. 25, 2014 Common Stock [Member] Amended October 2013 Share Repurchase Program [Member] Liberty Media [Member]	Sep. 30, 2014 Common Stock [Member] Amended October 2013 Share Repurchase Program [Member] Liberty Media [Member]		Sep. 30, 2013 Common Stock [Member] Amended October 2013 Share Repurchase Program [Member] Liberty Media [Member]		Sep. 30, 2014 Common Stock [Member] May ASR Agreement [Member]		Aug. 31, 2014 Common Stock [Member] May ASR Agreement [Member]	May 31, 2014 Common Stock [Member] May ASR Agreement [Member]	Sep. 30, 2014 Common Stock [Member] August ASR Agreement [Member]	Sep. 30, 2014 Common Stock [Member] August ASR Agreement [Member]		Aug. 31, 2014 Common Stock [Member] August ASR Agreement [Member]	Oct. 24, 2014 Common Stock [Member] Subsequent Event [Member] Open Market And Privately Negotiated Repurchases [Member]	Oct. 01, 2014 Common Stock [Member] Subsequent Event [Member] August ASR Agreement [Member]	Oct. 01, 2014 Common Stock [Member] Subsequent Event [Member] August ASR Agreement [Member]
Additional Stockholder's Equity (Textual) [Abstract]
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001		$ 0.001
Common stock, shares authorized (up to 9,000,000,000)	9,000,000,000		9,000,000,000		9,000,000,000
Common stock, shares issued (in shares)	5,542,621,493		5,542,621,493		6,096,220,526						5,542,621,493	6,096,220,526
Common stock, shares outstanding	5,538,190,736		5,538,190,736		6,096,220,526
Common stock reserved for issuance	582,655,000		582,655,000
Stock repurchase program, authorized amount																	$ 6,000,000,000			$ 500,000,000									$ 600,000,000				$ 250,000,000
Number of shares repurchases and retired											570,055,203				273,435,722	[1]						92,888,561	[2]			151,846,125	[3]				51,884,795	[4]
Stock repurchased and retired during period, value			1,955,826,000								2,006,013,000				909,609,000	[1]								340,000,000	[2]	506,404,000	[3]				250,000,000	[4]
Stock repurchased and retired during period, value																		160,000,000			340,000,000													81,007,000
Number of shares repurchased and retired																					92,888,561					151,846,125				51,884,795				24,555,150	19,431,708
Stock repurchase program, unused portion of authorized amount																												93,596,000
Share price (in dollars per share)																			$ 3.66
Loss on change in value of derivatives	0	0	34,485,000	0		34,485,000
Remaining amount authorized under the stock repurchase program	2,231,626,000		2,231,626,000
Treasury stock	(15,565,000)		(15,565,000)		0
Number of shares repurchased	1,090,313,069		1,090,313,069
Aggregate cost for shares repurchased	3,768,374,000		3,768,374,000																																	68,118,000
Amortization of costs related to share-lending arrangement and other issuance costs	3,524,000	3,178,000	10,303,000	9,484,000
Unamortized, debt issuance costs	2,398,000		2,398,000		12,701,000		2,345,000	12,423,000	53,000	278,000
Preferred stock, par value (in dollars per share)	$ 0.001		$ 0.001		$ 0.001
Undesignated preferred stock, shares authorized	50,000,000		50,000,000		50,000,000
Preferred stock, shares issued	0		0		0
Preferred stock, shares outstanding	0		0		0
Conversion of preferred stock to common stock (in shares)											3,259		1,293,509,076	1,293,509,076
Number of warrants exercised (in shares)			1,788,000
Issuance of common stock upon exercise of warrants (in shares)											99,349
Warrants outstanding	16,667,000		16,667,000		18,455,000
Weighted average exercise price on outstanding warrants	$ 2.50		$ 2.50		$ 2.55
Warrant expenses	$ 0	$ 0	$ 0	$ 0

[1] As of September 30, 2014, $15,565 of common stock repurchases had not settled, nor been retired, and were recorded as Treasury stock within our unaudited consolidated balance sheets and unaudited consolidated statements of stockholders' equity.

[2] On October 9, 2013, we entered into an agreement to repurchase $500,000 of our common stock from Liberty Media. Pursuant to this agreement, we repurchased $160,000 of our common stock from Liberty Media in 2013. On April 25, 2014, we completed the final purchase installment and repurchased 92,888,561 shares of our common stock for $340,000 from Liberty Media at a price of $3.66 per share. As there were certain terms in the forward purchase contract with Liberty Media that could have caused the obligation not to be fulfilled, the instrument was classified as a liability and was marked to fair value with any gain or loss recorded to our unaudited consolidated statements of comprehensive income. We recognized $34,485 to Loss on change in value of derivatives in our unaudited consolidated statements of comprehensive income during the nine months ended September 30, 2014.

[3] In May 2014, we entered into an accelerated share repurchase agreement (the "May ASR Agreement") and prepaid $600,000 to a third-party financial institution to repurchase our common stock. Under the May ASR Agreement, we received 151,846,125 shares of our common stock that were retired upon receipt. Upon settlement of the May ASR Agreement in August 2014, we received $93,596 for the unused portion of the original prepayment.

[4] In August 2014, we entered into a second accelerated share repurchase agreement (the "August ASR Agreement") with a third-party financial institution to repurchase up to $250,000 of our common stock. Under the August ASR Agreement, we prepaid $250,000 to the financial institution, of which $68,118 related to repurchases that settled on October 1, 2014. During the three months ended September 30, 2014, we received 51,884,795 shares of our common stock that were retired upon receipt. Upon settlement of the August ASR Agreement on October 1, 2014, we received an additional 19,431,708 shares of our common stock that were retired upon receipt. The aggregate purchase price we paid and the total aggregate number of shares repurchased under the August ASR Agreement were determined based on the VWAP of our common stock minus a discount.