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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Consolidated Balance Sheets    
Accounts and other receivables, allowance for doubtful accounts (in dollars) $ 1,015 $ 701
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, authorized shares 10,000,000 10,000,000
Preferred stock, issued shares 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized shares 35,000,000 35,000,000
Common stock, issued shares 18,822,139 18,709,260
Treasury stock, shares 26,639 219