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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Statement Of Financial Position [Abstract]    
Accounts receivable, less allowances $ 2,341 $ 2,136
Common stock, par value $ 2 $ 2
Common stock, shares authorized 15,000,000 15,000,000
Common stock, shares issued 5,389,992 5,391,074
Common stock, shares outstanding 5,389,992 5,391,074
Treasury shares, at par 783,418 779,279
Common stock, shares issued to rabbi trust 249,557 253,156