Note 2 - Acquisitions - Fair Value of Assets Acquired, Liabilities Assumed, and Goodwill from Acquisitions (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Goodwill	$ 610,494	$ 485,318
Fairbanks Acquistion [Member]
Current assets	122
Property and equipment	2,650
Goodwill	471
Broadcast licenses	2,228
Other intangible assets	2,702
Other non-current assets	71
Current liabilities	(140)
Other long-term liabilities	(84)
Total	8,020
Green Bay Acquisition and Davenport Acquisition [Member]
Current assets	666
Property and equipment	20,471
Goodwill	85,997
Broadcast licenses	149,846
Other intangible assets	13,398
Other non-current assets	282
Current liabilities	(695)
Other long-term liabilities
Total	269,965
Clarksburg Acquisition [Member]
Current assets	462
Property and equipment	4,133
Goodwill	3,222
Broadcast licenses	17,003
Other intangible assets	2,234
Other non-current assets	51
Current liabilities	(554)
Other long-term liabilities	(51)
Total	26,500
Bangor Acquisition and Gainesville Acquisition [Member]
Current assets	361
Property and equipment	12,329
Goodwill	35,486
Broadcast licenses	26,219
Other intangible assets	11,051
Other non-current assets	27
Current liabilities	(423)
Other long-term liabilities	(50)
Total	85,000
2017 Acquisitions [Member]
Current assets	1,611
Property and equipment	39,583
Goodwill	125,176
Broadcast licenses	195,296
Other intangible assets	29,385
Other non-current assets	431
Current liabilities	(1,812)
Other long-term liabilities	(185)
Total	$ 389,485