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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Allowance for doubtful accounts $ 429 $ 392
Preferred stock, par value per share $ 0.10 $ 0.10
Preferred stock, shares authorized 400,000 400,000
Preferred stock, shares issued      
Common stock, par value per share $ 0.10 $ 0.10
Common stock, shares authorized 40,000,000 40,000,000
Common stock, shares issued 31,190,906 31,092,782
Treasury stock, shares 2,450,634 2,380,634