Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Repurchase Agreements (Details)

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Stockholders' Equity - Schedule of Repurchase Agreements (Details) - USD ($)
shares in Thousands, $ in Thousands
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) 288,156 393,809
Common stock repurchased, value $ 1,093,955 $ 1,552,903
Common Stock [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) 0  
Common stock repurchased, value $ 0  
Common Stock [Member] | Open Market And Privately Negotiated Repurchases [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) [1] 288,156 188,420
Common stock repurchased, value [1] $ 1,093,955 $ 612,903
Common Stock [Member] | Amended October 2013 Share Repurchase Program [Member] | Liberty Media [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) [2] 0 92,889
Common stock repurchased, value [2] $ 0 $ 340,000
Common Stock [Member] | May 2014 ASR Agreement [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) [3] 0 112,500
Common stock repurchased, value [3] $ 0 $ 600,000
[1] As of June 30, 2015, $35,795 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 April 25, 2014, we completed the final purchase installment under an agreement with Liberty Media.
[3] In May 2014, we entered into an accelerated share repurchase agreement (the “May 2014 ASR Agreement”) under which we prepaid $600,000 to a third-party financial institution to repurchase our common stock. Under the May 2014 ASR Agreement, we received an initial delivery of 112,500 shares of our common stock during the six months ended June 30, 2014 which were retired upon settlement. Subsequent to June 30, 2014, we received 39,346 shares of our common stock and $93,596 for the unused portion of the original prepayment under the May 2014 ASR Agreement.