Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 41,066	$ 36,130
Trade receivables, net of allowance for doubtful accounts of $3,432 and $4,396 (including related parties of $8,771 and $4,916)	52,417	48,030
Prepaid expenses and other current assets (including related parties of $274 and $274)	4,473	4,245
Total current assets	97,956	88,405
Property and equipment, net	59,170	61,435
Intangible assets subject to amortization, net (including related parties of $19,719 and $20,880)	21,080	22,349
Intangible assets not subject to amortization	220,701	220,701
Goodwill	36,647	36,647
Other assets	13,002	8,514
Total assets	448,556	438,051
Current liabilities
Current maturities of long-term debt	200	150
Advances payable, related parties	118	118
Accounts payable and accrued expenses (including related parties of $3,907 and $3,576)	37,824	39,158
Total current liabilities	38,142	39,426
Long-term debt, less current maturities (net of bond discount of $2,711 and $2,982)	340,835	340,664
Other long-term liabilities	6,934	7,359
Deferred income taxes	48,495	45,201
Total liabilities	434,406	432,650
Commitments and contingencies (note 4)
Stockholders' equity (deficit)
Additional paid-in capital	935,446	930,814
Accumulated deficit	(921,305)	(925,421)
Total stockholders' equity (deficit)	14,150	5,401
Total liabilities and stockholders' equity (deficit)	448,556	438,051
Class A Common Stock
Stockholders' equity (deficit)
Common stock	6	5
Class B Common Stock
Stockholders' equity (deficit)
Common stock	2	2
Class U Common stock
Stockholders' equity (deficit)
Common stock	$ 1	$ 1