Note 9 - Goodwill and Intangible Assets - Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Goodwill, Gross	$ 611,100	$ 485,318
Goodwill	611,100	485,318
Goodwill and Indefinite-Lived Intangible Assets, Gross	2,194,922	1,879,322
Goodwill and Indefinite-lived Intangible Assets, Accumulated Amortization	(53,699)	(53,699)
Goodwill and Indefinite-Lived Assets, Net	2,141,223	1,825,623
Finite-Lived Intangible Assets, Gross	149,580	107,056
Finite-Lived Intangible Assets, Accumulated Amortization	(69,408)	(50,806)
Other intangible assets, net	80,172	56,250
Intangible Assets Gross (Including Goodwill)	2,344,502	1,986,378
Accumulated Amortization Intangible Assets	(123,107)	(104,505)
Intangible Assets, Net (Including Goodwill)	2,221,395	1,881,873
Network Affiliate [Member]
Finite-Lived Intangible Assets, Gross	6,134	1,264
Finite-Lived Intangible Assets, Accumulated Amortization	(2,905)	(1,264)
Other intangible assets, net	3,229
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	143,446	105,792
Finite-Lived Intangible Assets, Accumulated Amortization	(66,503)	(49,542)
Other intangible assets, net	76,943	56,250
Broadcast Licenses [Member]
Indefinite-lived Intangible Assets (Excluding Goodwill), Gross	1,583,822	1,394,004
Indefinite-Lived Intangible Assets (Excluding Goodwill), Accumulated Amortization	(53,699)	(53,699)
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 1,530,123	$ 1,340,305