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CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)
Feb. 29, 2012
May 31, 2011
Feb. 28, 2011
Preferred Stock, par value $ 1.00 $ 1.00 $ 1.00
Common Stock, par or stated value per share $ 0.01 $ 0.01 $ 0.01
Common Class A [Member]
     
Common Stock, par or stated value per share $ 0.01 $ 0.01 $ 0.01