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Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Allowance for doubtful accounts receivable $ 2,114 $ 2,314
Preferred stock, no par value      
Preferred stock, cumulative redeemable designated 1,000 1,000
Preferred stock, shares issued 259 259
Preferred Stock outstanding 259 259
Preferred stock, aggregate liquidation value $ 25,921 $ 25,921
Class A Common Stock
    
Common stock, shares authorized 15,000,000 15,000,000
Common stock, shares issued 7,332,000 7,332,000
Common stock, par value      
Class B Common Stock
    
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 56,496,000 56,057,000
Common stock, par value      
Class A Treasury Stock
    
Treasury stock, shares 1,579,000 1,579,000
Class B Treasury Stock
    
Treasury stock, shares 4,655,000 4,655,000