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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Allowance for doubtful accounts $ 623 $ 340
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 30,766,730 29,845,047
Treasury stock, Shares 2,310,634 2,260,996