Note 3 - Variable Interest Entities (Details) - Carrying Amounts and Classification of Assets and Liabilities of Shield Stations (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 18,166	$ 71,618	$ 21,397	$ 24,244
Trade accounts receivable (less allowance for doubtful accounts 2014 - $119; 2013 - $105)	108,744	110,283
Prepaid expenses and other current assets	12,653	13,889
Total current assets	149,552	203,296
Property and equipment, net	273,910	285,467
Other assets, net	45,129	35,477
Definite lived intangible assets, net	226,977	239,642
Goodwill	541,475	541,475
Total assets	1,841,681	1,921,368
Current liabilities
Other accrued expenses and other current liabilities	39,473	42,656
Current installments of long-term debt	2,400	11,217
Total current liabilities	97,104	79,992
Long-term debt	849,400	905,783
Total liabilities	1,084,475	1,186,131
Shield Stations [Member]
Current assets
Cash and cash equivalents	2,310	4,110
Trade accounts receivable (less allowance for doubtful accounts 2014 - $119; 2013 - $105)	3,596	3,831
Prepaid expenses and other current assets	552	671
Total current assets	6,458	8,612
Property and equipment, net	2,196	2,996
Other assets, net	1,350	697
Definite lived intangible assets, net	3,247	3,400
Broadcast licenses	22,400	22,400
Goodwill	2,730	2,730
Total assets	38,381	40,835
Current liabilities
Trade accounts payable	872
Other accrued expenses and other current liabilities	1,929	2,180
Current installments of long-term debt	2,400	2,400
Total current liabilities	5,201	4,580
Long-term debt	28,400	29,600
Other liabilities	6,364	8,399
Total liabilities	$ 39,965	$ 42,579