| 
           Property and Equipment (Details Textual) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| 
           Sep. 30, 2012 
         | 
        
           Sep. 30, 2011 
         | 
        
           Sep. 30, 2012
 
          Satellites 
         | 
        
           Sep. 30, 2011 
         | 
      |
| Property and equipment (Textual) [Abstract] | ||||
| Depreciation and amortization expense on property and equipment | $ 53,373 | $ 50,833 | $ 158,706 | $ 156,032 | 
| Number of owned satellites (in satellites) | 9 | |||
| Capitalized expenditures, including interest | $ 8,219 | $ 16,875 | $ 25,224 | $ 67,576 | 
| 
           Sirius system [Member] 
         | 
        ||||
| Property and equipment (Textual) [Abstract] | ||||
| Number of owned satellites (in satellites) | 4 | |||
| 
           XM system [Member] 
         | 
        ||||
| Property and equipment (Textual) [Abstract] | ||||
| Number of owned satellites (in satellites) | 5 | |||
| 
           Boeing Satellite Systems International [Member] 
         | 
        ||||
| Property and equipment (Textual) [Abstract] | ||||
| Number of owned satellites (in satellites) | 4 | |||
| 
           Space Systems/Loral [Member] 
         | 
        ||||
| Property and equipment (Textual) [Abstract] | ||||
| Number of owned satellites (in satellites) | 5 | |||