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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Redeemable preferred stock, par value $ 0.60 $ 0.60
Redeemable preferred stock, Authorized 200,000 200,000
Redeemable preferred stock, issued 22,094 22,427
Redeemable preferred stock, outstanding 22,094 22,427
Common Class A
    
Common stock, par value $ 0.60 $ 0.60
Common stock, Authorized 24,655,000 24,655,000
Common stock, issued 14,579,496 14,568,696
Common stock, outstanding 14,579,496 14,568,696
Common Class B
    
Common stock, par value $ 0.60 $ 0.60
Common stock, Authorized 145,000 145,000
Common stock, issued      
Common stock, outstanding