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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $)
Mar. 31, 2012
Dec. 31, 2011
STOCKHOLDERS' EQUITY:    
Common stock, par value (in dollars per share) $ 2 $ 2
Common stock, authorized shares (in shares) 12,500,000 12,500,000
Common stock, issued shares (in shares) 3,341,251 3,341,251
Treasury stock, shares (in shares) 222,445 222,395