| 
           Intangible Assets (Details 2) (USD $) 
        In Thousands, unless otherwise specified  | 
        6 Months Ended | 
|---|---|
| 
           Jun. 30, 2012 
         | 
      |
| Expected amortization expense for each of the fiscal years | |
| 2012 | $ 26,074 | 
| 2013 | 47,357 | 
| 2014 | 38,879 | 
| 2015 | 37,553 | 
| 2016 | 31,959 | 
| Thereafter | 30,585 | 
| Total definite life intangible assets, net | $ 212,407 | 
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- Definition 
          The aggregate estimated amortization expense for succeeding fiscal years for intangible assets subject to amortization. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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- Definition 
          The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fifth succeeding fiscal year. No definition available. 
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- Definition 
          The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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