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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]    
Accounts receivable, net of allowance for doubtful accounts $ 250 $ 245
Property and equipment, net of accumulated depreciation 62,925 59,217
Intangible assets, net of accumulated amortization $ 11,636 $ 10,899
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 2,000 2,000
Preferred stock, shares outstanding      
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 50,000 50,000
Common stock, shares issued 33,082 33,081
Common stock, shares outstanding 32,262 32,262
Treasury stock, shares 2,436 2,436