Note 9 - Goodwill and Intangible Assets - Changes in Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Goodwill			$ 485,318
Goodwill			125,782
Goodwill
Goodwill	$ 611,100		611,100
Broadcast licenses			1,340,305
Broadcast licenses	1,530,123		1,530,123
Definite lived intangible assets			56,250
Definite lived intangible assets			42,606
Definite lived intangible assets	(6,460)	$ (4,235)	(18,684)	$ (12,365)
Definite lived intangible assets	80,172		80,172
Total intangible assets net of accumulated amortization			1,881,873
Total intangible assets net of accumulated amortization			371,311
Total intangible assets net of accumulated amortization			(13,105)
Total intangible assets net of accumulated amortization	2,221,395		2,221,395
Broadcast Licenses [Member]
Broadcast licenses			1,340,305
Broadcast licenses			202,923
Broadcast licenses			(13,105)
Broadcast licenses	$ 1,530,123		$ 1,530,123