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           Intangible Assets (Details Textual) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | |||||
|---|---|---|---|---|---|---|---|
| 
           Sep. 30, 2012 
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           Sep. 30, 2011 
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           Sep. 30, 2012 
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           Sep. 30, 2011 
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           Sep. 30, 2012
 
          Subscriber relationships [Member] 
         | 
        
           Sep. 30, 2012
 
          Licensing agreements [Member] 
         | 
        
           Jul. 31, 2008
 
          Trademarks [Member] 
         | 
      |
| Intangible Assets (Textual) [Abstract] | |||||||
| Purchase price related to merger | $ 250,000 | ||||||
| Impairment loss related to indefinite-lived intangibles | 0 | 0 | 0 | 0 | |||
| Intangible assets (Additional Textual) [Abstract] | |||||||
| Weighted average useful lives (in years) | 9 years | 9 years 1 month 6 days | |||||
| Amortization expense | $ 13,198 | $ 14,570 | $ 40,775 | $ 44,833 | |||
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- Definition 
          The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will not be amortized. Does not include goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available. 
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- Definition 
          The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an indefinite-lived intangible asset, other than goodwill, to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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