Note 8 - Goodwill and Intangible Assets - Changes in Goodwill and Other Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Broadcast Licenses [Member]
Broadcast licenses			$ 1,114,626,000
Broadcast licenses			251,035,000
Broadcast licenses			(25,356,000)
Broadcast licenses	$ 1,340,305,000		1,340,305,000
Goodwill			423,236,000
Goodwill, Acquired During Period			72,584,000
Goodwill			(10,215,000)
Goodwill	485,605,000		485,605,000
Broadcast licenses			1,114,626,000
Broadcast licenses	1,340,305,000		1,340,305,000
Definite lived intangible assets			53,280,000
Finite-lived Intangible Assets Acquired			19,566,000
Definite lived intangible assets
Amortization	(4,235,000)	$ (3,213,000)	(12,365,000)	$ (8,715,000)
Definite lived intangible assets	60,481,000		60,481,000
Total intangible assets net of accumulated amortization			1,591,142,000
Total intangible assets net of accumulated amortization			343,185,000
Total intangible assets net of accumulated amortization			(35,571,000)
Total intangible assets net of accumulated amortization	$ 1,886,391,000		$ 1,886,391,000