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Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Consolidated Balance Sheets [Abstract]    
Accounts receivable, less allowances $ 1,887 $ 1,627
Common stock, par value $ 2 $ 2
Common stock. shares authorized 15,000,000 15,000,000
Common stock, shares issued 5,333,018 5,333,630
Common stock, shares outstanding 5,333,018 5,333,630
Treasury shares, at par 642,388 639,138