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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Allowance for doubtful accounts $ 7,600,000 $ 7,500,000
Accumulated amortization 26,697,000 28,187,000
Shares held in treasury 17,119,205 17,082,652
Common Class A
    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 175,000,000 175,000,000
Common stock, shares issued 95,560,123 95,011,499
Common stock, shares outstanding 78,440,918 77,928,847
Common Class B
    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 37,500,000 37,500,000
Common stock, shares issued 14,910,365 15,122,865
Common stock, shares outstanding 14,910,365 15,122,865
Preferred Class A
    
Preferred stock, par value $ 638 $ 638
Preferred stock, cumulative dividends 63,800 63,800
Preferred Stock, shares authorized 10,000 10,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Series AA Preferred Stock
    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, cumulative dividends 63,800 63,800
Preferred Stock, shares authorized 5,720 5,720
Preferred stock, shares issued 5,720 5,720
Preferred stock, shares outstanding 5,720 5,720
LAMAR MEDIA CORP. AND SUBSIDIARIES
    
Allowance for doubtful accounts 7,600,000 7,500,000
Accumulated amortization $ 17,409,000 $ 18,899,000
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 3,000 3,000
Common stock, shares issued 100 100
Common stock, shares outstanding 100 100