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Condensed Consolidated Balance Sheet (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Condensed Consolidated Balance Sheet [Abstract]    
Allowance for doubtful accounts, Accounts receivable $ 1,200 $ 1,187
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 600,000,000 600,000,000
Preferred stock, shares issued 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 230,000,000 230,000,000
Common stock, shares issued 35,066,000 34,912,000
Treasury stock, shares at cost 4,131,000 3,819,000