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Marketable Securities (Tables)
3 Months Ended
Mar. 31, 2013
Trading Securities (and Certain Trading Assets) [Table Text Block] The following table sets forth the beginning balance at July 1, 2012 and 2011, gross unrealized gains and losses, contributions, redemptions and fair value of trading securities at March 31, 2013 and 2012:
    Balance     Gross     Gross                    
    Beginning of     Unrealized     Unrealized             Ending  
    Fiscal Year     Gains     Losses     Contributions     Redemptions     Balance  
March 31, 2013                                    
Marketable Securities   $ 729      $ 93      $      $      $ (134 )    $ 688  
                                                 
March 31, 2012                                                
Marketable Securities   $ 980     $ 99     $ (134 )   $     $ (127 )   $ 818