Note 9 - Goodwill and Intangible Assets - Changes in Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Goodwill			$ 485,318
Goodwill			125,176
Goodwill
Goodwill	$ 610,494		610,494
Broadcast licenses			1,340,305
Broadcast licenses	1,522,532		1,522,532
Finite-lived intangible assets			56,250
Finite-lived intangible assets			34,338
Finite-lived intangible assets	(6,657)	$ (4,242)	(12,224)	$ (8,130)
Finite-lived intangible assets	78,364		78,364
Total intangible assets net of accumulated amortization			1,881,873
Total intangible assets net of accumulated amortization			354,846
Total intangible assets net of accumulated amortization			(13,105)
Total intangible assets net of accumulated amortization	(6,657)	$ (4,242)	(12,224)	$ (8,130)
Total intangible assets net of accumulated amortization	2,211,390		2,211,390
Broadcast Licenses [Member]
Broadcast licenses			1,340,305
Broadcast licenses			195,332
Broadcast licenses			(13,105)
Broadcast licenses	$ 1,522,532		$ 1,522,532