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Fair Value Measurements And Marketable Securities (Tables)
6 Months Ended
Jun. 30, 2012
Fair Value Measurements And Marketable Securities [Abstract]  
Schedule Of Fair Value Of Available-For-Sale Securities By Major Security Type
    June 30,
2012
    December 31,
2011
 
State and municipal bonds   $ 2,300     $ 866  
Corporate obligations     904       1,227  
    $ 3,204     $ 2,093