Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 43,822	$ 36,130
Trade receivables, net of allowance for doubtful accounts of $3,199 and $4,396 (including related parties of $7,102 and $4,916)	57,043	48,030
Deferred income taxes	6,100	425
Prepaid expenses and other current assets (including related parties of $274 and $274)	4,087	3,820
Total current assets	111,052	88,405
Property and equipment, net	58,765	61,435
Intangible assets subject to amortization, net (including related parties of $18,559 and $20,880)	19,812	22,349
Intangible assets not subject to amortization	220,701	220,701
Goodwill	36,647	36,647
Deferred income taxes	83,856
Other assets	7,404	8,514
Total assets	538,237	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 $3,994 and $3,576)	31,246	39,158
Total current liabilities	35,114	39,426
Long-term debt, less current maturities (net of bond discount of $0 and $2,982)	360,313	340,664
Other long-term liabilities	6,786	7,359
Deferred income taxes		45,201
Total liabilities	402,213	432,650
Commitments and contingencies (note 11)
Stockholders' equity
Additional paid-in capital	927,377	930,814
Accumulated deficit	(791,596)	(925,421)
Accumulated other comprehensive income	234
Total stockholders' equity	136,024	5,401
Total liabilities and stockholders' equity	538,237	438,051
Class A common stock [Member]
Stockholders' equity
Common stock	6	5
Total stockholders' equity	6	5
Class B common stock [Member]
Stockholders' equity
Common stock	2	2
Total stockholders' equity	2	2
Class U common stock [Member]
Stockholders' equity
Common stock	1	1
Total stockholders' equity	$ 1	$ 1