Note 4 - Variable Interest Entities (Details) - Carrying Amounts and Classification of Assets and Liabilities of Shield Stations (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 58,311	$ 43,920	$ 14,255	$ 71,618
Trade accounts receivable (less allowance for doubtful accounts 2015 - $149; 2014 - $99)	234,577	265,169
Prepaid expenses and other current assets	39,157	39,798
Total current assets	504,117	524,544
Property and equipment, net	489,262	499,878
Other assets, net	75,403	79,000
Definite lived intangible assets, net	934,268	956,100
Goodwill	1,595,726	1,595,726
Total assets	4,695,876	4,752,348
Current liabilities
Other accrued expenses and other current liabilities	122,471	102,692
Current installments of long-term debt	3,555	11,781
Total current liabilities	175,372	188,281
Long-term debt	2,372,800	2,400,162
Total liabilities	3,162,105	3,217,446
Shield Stations [Member]
Current assets
Cash and cash equivalents	6,175	3,846
Trade accounts receivable (less allowance for doubtful accounts 2015 - $149; 2014 - $99)	7,983	10,336
Prepaid expenses and other current assets	1,347	1,156
Total current assets	15,505	15,338
Property and equipment, net	5,245	5,402
Other assets, net	1,622	2,011
Definite lived intangible assets, net	34,201	34,885
Broadcast licenses	71,300	71,300
Goodwill	26,097	26,097
Total assets	153,970	155,033
Current liabilities
Trade accounts payable	181	56
Other accrued expenses and other current liabilities	3,379	6,839
Current installments of long-term debt	3,562	3,562
Total current liabilities	7,122	10,457
Long-term debt	27,259	28,150
Other liabilities	3,924	3,914
Total liabilities	$ 38,305	$ 42,521