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Stock-Based Compensation (Details 8) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock-Based Compensation      
Non-cash, stock-based compensation $ 30,655,000 $ 40,970,000 $ 31,521,000
Continuing operations
     
Stock-Based Compensation      
Non-cash, stock-based compensation 29,730,000 39,327,000 31,213,000
Discontinued operations
     
Stock-Based Compensation      
Non-cash, stock-based compensation 925,000 1,643,000 308,000
Subscriber-related
     
Stock-Based Compensation      
Non-cash, stock-based compensation 1,947,000 1,607,000 1,914,000
General and administrative
     
Stock-Based Compensation      
Non-cash, stock-based compensation 27,783,000 37,720,000 29,299,000
Non-Performance Based Stock Awards
     
Share-based expenses      
Unrecognized compensation expense $ 12,000,000    
Share-based compensation additional disclosures      
Future forfeiture rate (as a percent) 3.70%    
Weighted average period for recognition of compensation cost 2 years