Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 53,546	$ 36,130
Trade receivables, net of allowance for doubtful accounts of $3,342 and $4,396 (including related parties of $6,555 and $4,916)	52,017	48,030
Prepaid expenses and other current assets (including related parties of $274 and $274)	5,434	4,245
Total current assets	110,997	88,405
Property and equipment, net	59,589	61,435
Intangible assets subject to amortization, net (including related parties of $19,139 and $20,880)	20,446	22,349
Intangible assets not subject to amortization	220,701	220,701
Goodwill	36,647	36,647
Other assets	7,284	8,514
Total assets	455,664	438,051
Current liabilities
Current maturities of long-term debt	3,750	150
Advances payable, related parties	118	118
Accounts payable and accrued expenses (including related parties of $4,004 and $3,576)	29,025	39,158
Total current liabilities	32,893	39,426
Long-term debt, less current maturities (net of bond discount of $0 and $2,982)	371,250	340,664
Other long-term liabilities	6,874	7,359
Deferred income taxes	50,256	45,201
Total liabilities	461,273	432,650
Commitments and contingencies (note 4)
Stockholders' equity (deficit)
Additional paid-in capital	937,071	930,814
Accumulated deficit	(942,689)	(925,421)
Total stockholders' equity (deficit)	(5,609)	5,401
Total liabilities and stockholders' equity (deficit)	455,664	438,051
Class A common stock [Member]
Stockholders' equity (deficit)
Common stock	6	5
Class B common stock [Member]
Stockholders' equity (deficit)
Common stock	2	2
Class U common stock [Member]
Stockholders' equity (deficit)
Common stock	$ 1	$ 1