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Condensed Consolidated Balance Sheets (Unaudited, except for December 31) (Parenthetical) (USD $)
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2010
Mar. 31, 2010
Equity        
Common stock, par value $ 1 $ 1 $ 1 [1] $ 1
[1] As Restated, See Note 1