Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Allowance for doubtful accounts	$ 941	$ 813
Accumulated depreciation on property and equipment	55,360	52,819
Accumulated depreciation on other intangible assets	268	250
Accumulated amortization on deferred financing costs	$ 6,613	$ 6,088
10.75% Series B cumulative exchangeable redeemable preferred stock
Cumulative exchangeable redeemable preferred stock:
Preferred Stock, liquidation value per share	$ 1,000	$ 1,000
Preferred Stock, shares authorized	280,000	280,000
Preferred Stock, shares issued	92,349	92,349
Preferred Stock, shares outstanding	92,349	92,349
Preferred Stock, par value	$ 0.01	$ 0.01
Series C convertible preferred stock
Stockholders' deficit:
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, liquidation value per share	$ 0.01	$ 0.01
Preferred Stock, shares authorized	600,000	600,000
Preferred Stock, shares issued	380,000	380,000
Preferred Stock, shares outstanding	380,000	380,000
Class A common stock
Stockholders' deficit:
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	4,166,991	4,163,991
Common stock, shares outstanding	4,166,991	4,163,991
Class B common stock
Stockholders' deficit:
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	2,340,353	2,340,353
Common stock, shares outstanding	2,340,353	2,340,353