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Note 8 - Changes in Goodwill and Other Intangible Assets (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Broadcast Licenses [Member]    
Broadcast licenses $ 1,114,626,000  
Broadcast licenses 249,591,000  
Broadcast licenses (25,356,000)  
Broadcast licenses 1,338,861,000  
Goodwill 423,236,000  
Goodwill, Acquired During Period 71,640,000  
Goodwill (10,214,000)  
Goodwill 484,662,000  
Broadcast licenses 1,114,626,000  
Broadcast licenses 1,338,861,000  
Definite lived intangible assets 53,280,000  
Finite-lived Intangible Assets Acquired $ 19,739,000  
Definite lived intangible assets  
Amortization $ (3,888,000) $ (2,771,000)
Definite lived intangible assets 69,131,000  
Total intangible assets net of accumulated amortization 1,591,142,000  
Total intangible assets net of accumulated amortization 340,970,000  
Total intangible assets net of accumulated amortization (35,570,000)  
Total intangible assets net of accumulated amortization $ 1,892,654,000