Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Reportable segments                      
Revenues $ 108,301 $ 84,594 $ 67,852 $ 63,510 $ 75,181 $ 55,626 $ 58,190 $ 52,331 $ 324,257 $ 241,328 $ 182,713
Adjusted EBITDA                 134,594 116,148 76,074
Less:                      
Acquisition and integration (1,343) (10,571) (3,195) (10) (169) (100)     (15,119) (269)  
Share-based compensation                 (12,430) (4,805) (3,983)
Depreciation and amortization                 (38,736) (29,236) (25,736)
Income from operations                 68,309 81,838 46,355
Goodwill 576,435       226,257       576,435 226,257 214,777
Television
                     
Reportable segments                      
Revenues                 246,780 222,894 169,637
Adjusted EBITDA                 123,260 116,219 79,014
Less:                      
Goodwill 231,777               231,777    
Online
                     
Reportable segments                      
Revenues                 77,477 18,434 13,076
Adjusted EBITDA                 11,334 (71) (2,940)
Less:                      
Goodwill 342,660               342,660    
Television Segment
                     
Less:                      
Goodwill $ 233,800               $ 233,800