Note 10 - Goodwill and Intangible Assets - Changes in Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill, net	$ 423,236	$ 374,390
Goodwill, Acquired During Period	72,296	48,916
Goodwill	(10,214)	(70)
Goodwill	485,318	423,236	$ 374,390
Broadcast licenses	1,114,626
Broadcast licenses	1,340,305	1,114,626
Finite-lived intangible assets	53,280	47,802
Finite-lived Intangible Assets Acquired	19,566	17,845
Finite-lived intangible assets	(16,596)	(11,982)	(8,297)
Finite-lived intangible assets	56,250	53,280	47,802
Total intangible assets net of accumulated amortization	1,591,142	1,445,772
Total intangible assets net of accumulated amortization	342,897	157,953
Total intangible assets net of accumulated amortization	(35,570)	(601)
Total intangible assets net of accumulated amortization	1,881,873	1,591,142	1,445,772
Finite-lived intangible assets		(385)
Broadcast Licenses [Member]
Broadcast licenses	1,114,626	1,023,580
Broadcast licenses	251,035	91,192
Broadcast licenses	(25,356)	(146)
Broadcast licenses	$ 1,340,305	$ 1,114,626	$ 1,023,580