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Unaudited Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Balance Sheets [Abstract]    
Allowances for doubtful accounts $ 5,819 $ 6,596
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 20,000,000 20,000,000
Common stock, shares issued 10,852,020 11,387,299
Common stock, shares outstanding 10,852,020 11,387,299