Note 3 - Variable Interest Entities (Details) - Carrying Amounts and Classification of Assets and Liabilities of Shield Stations (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 14,255	$ 71,618	$ 18,471	$ 24,244
Trade accounts receivable (less allowance for doubtful accounts 2014 - $99; 2013 - $105)	108,151	110,283
Prepaid expenses and other current assets	14,076	13,889
Total current assets	145,873	203,296
Property and equipment, net	278,632	285,467
Other assets, net	35,833	35,477
Definite lived intangible assets, net	233,310	239,642
Goodwill	541,475	541,475
Total assets	1,845,693	1,921,368
Current liabilities
Other accrued expenses and other current liabilities	50,141	42,656
Current installments of long-term debt	2,400	11,217
Total current liabilities	80,160	79,992
Long-term debt	879,000	905,783
Total liabilities	1,104,058	1,186,131
Shield Stations [Member]
Current assets
Cash and cash equivalents	1,891	4,110
Trade accounts receivable (less allowance for doubtful accounts 2014 - $99; 2013 - $105)	3,666	3,831
Prepaid expenses and other current assets	759	671
Total current assets	6,316	8,612
Property and equipment, net	2,883	2,996
Other assets, net	867	697
Definite lived intangible assets, net	3,323	3,400
Broadcast licenses	22,400	22,400
Goodwill	2,730	2,730
Total assets	38,519	40,835
Current liabilities
Trade accounts payable	11
Other accrued expenses and other current liabilities	2,530	2,180
Current installments of long-term debt	2,400	2,400
Total current liabilities	4,941	4,580
Long-term debt	29,000	29,600
Other liabilities	6,268	8,399
Total liabilities	$ 40,209	$ 42,579