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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Allowance for doubtful accounts $ 623 $ 623
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 30,923,543 30,766,730
Treasury stock, shares 2,310,634 2,310,634