| 
           Related Party Transactions (Details 1) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 3 Months Ended | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
           Sep. 30, 2012
 
          8.75% Senior Notes due 2015 [Member] 
         | 
        
           Dec. 31, 2011
 
          8.75% Senior Notes due 2015 [Member] 
         | 
        
           Mar. 31, 2010
 
          8.75% Senior Notes due 2015 [Member] 
         | 
        
           Sep. 30, 2012
 
          9.75% Senior Secured Notes due 2015 [Member] 
         | 
        
           Sep. 30, 2012
 
          9.75% Senior Secured Notes due 2015 [Member] 
         | 
        
           Dec. 31, 2011
 
          9.75% Senior Secured Notes due 2015 [Member] 
         | 
        
           Aug. 31, 2009
 
          9.75% Senior Secured Notes due 2015 [Member] 
         | 
        
           Sep. 30, 2012
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Sep. 30, 2012
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Dec. 31, 2011
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Jul. 31, 2008
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Sep. 30, 2012
 
          7% Exchangeable Senior Subordinated Notes due 2014 [Member] 
         | 
        
           Dec. 31, 2011
 
          7% Exchangeable Senior Subordinated Notes due 2014 [Member] 
         | 
        
           Aug. 31, 2008
 
          7% Exchangeable Senior Subordinated Notes due 2014 [Member] 
         | 
        
           Sep. 30, 2012
 
          7.625% Senior Notes due 2018 [Member] 
         | 
        
           Dec. 31, 2011
 
          7.625% Senior Notes due 2018 [Member] 
         | 
        
           Oct. 31, 2010
 
          7.625% Senior Notes due 2018 [Member] 
         | 
        
           Sep. 30, 2012
 
          Liberty Media [Member] 
         | 
        
           Dec. 31, 2011
 
          Liberty Media [Member] 
         | 
        
           Sep. 30, 2012
 
          Liberty Media [Member]
 
          8.75% Senior Notes due 2015 [Member] 
         | 
        
           Dec. 31, 2011
 
          Liberty Media [Member]
 
          8.75% Senior Notes due 2015 [Member] 
         | 
        
           Sep. 30, 2012
 
          Liberty Media [Member]
 
          9.75% Senior Secured Notes due 2015 [Member] 
         | 
        
           Dec. 31, 2011
 
          Liberty Media [Member]
 
          9.75% Senior Secured Notes due 2015 [Member] 
         | 
        
           Sep. 30, 2012
 
          Liberty Media [Member]
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Dec. 31, 2011
 
          Liberty Media [Member]
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Sep. 30, 2012
 
          Liberty Media [Member]
 
          7% Exchangeable Senior Subordinated Notes due 2014 [Member] 
         | 
        
           Dec. 31, 2011
 
          Liberty Media [Member]
 
          7% Exchangeable Senior Subordinated Notes due 2014 [Member] 
         | 
        
           Sep. 30, 2012
 
          Liberty Media [Member]
 
          7.625% Senior Notes due 2018 [Member] 
         | 
        
           Dec. 31, 2011
 
          Liberty Media [Member]
 
          7.625% Senior Notes due 2018 [Member] 
         | 
      |
| Summary of Related party long term debt | |||||||||||||||||||||||||||||
| Total principal debt | $ 800,000 | $ 257,000 | $ 778,500 | $ 550,000 | $ 700,000 | $ 211,000 | $ 337,000 | $ 150,000 | $ 150,000 | $ 0 | $ 50,000 | $ 0 | $ 76,000 | $ 11,000 | $ 11,000 | $ 50,000 | $ 50,000 | ||||||||||||
| Less: discounts | 7,754 | 9,753 | 14,000 | 0 | 0 | 8,356 | 12,708 | 0 | 0 | 39,504 | 4,591 | 5,956 | 9,970 | 10,898 | 2,258 | 8,212 | |||||||||||||
| Total carrying value of debt | 800,000 | 800,000 | 0 | 0 | 257,000 | 0 | 0 | 778,500 | 550,000 | 550,000 | 700,000 | 700,000 | 208,742 | 328,788 | |||||||||||||||
| Principal balance repaid | $ 186,112 | $ 257,000 | $ 681,517 | $ 778,500 | $ 50,000 | $ 76,000 | |||||||||||||||||||||||
| Interest rate on instrument | 8.75% | 9.75% | 13.00% | 7.00% | 7.625% |