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Marketable Securities
9 Months Ended
Jun. 30, 2011
Marketable Securities [Abstract]  
MARKETABLE SECURITIES
NOTE C – MARKETABLE SECURITIES
     The Company invests a portion of its cash on hand by purchasing marketable securities with maturities in excess of three months. These securities are held in the custody of a single financial institution. The Company considers its investment portfolio to be available-for-sale. The Company’s marketable securities at June 30, 2011 and September 30, 2010 consisted of the following:
                                 
    June 30, 2011
            Gross     Gross        
    Amortized     Unrealized     Unrealized        
    Cost     Gains     Losses     Fair Value  
    (In millions)  
Type of security:
                               
U.S. Treasury securities
  $ 9.1     $     $     $ 9.1  
Obligations of U.S. government agencies
    73.2       0.1             73.3  
Corporate debt securities issued under the
FDIC Temporary Liquidity Guarantee Program
    114.0       0.1             114.1  
Corporate debt securities
    95.5       0.1             95.6  
 
                       
Total debt securities
    291.8       0.3             292.1  
Certificates of deposit
    5.0                   5.0  
 
                       
Total marketable securities, available-for-sale
  $ 296.8     $ 0.3     $     $ 297.1  
 
                       
 
    September 30, 2010
            Gross     Gross        
    Amortized     Unrealized     Unrealized        
    Cost     Gains     Losses     Fair Value  
    (In millions)  
Type of security:
                               
U.S. Treasury securities
  $ 1.0     $     $     $ 1.0  
Obligations of U.S. government agencies
    131.0       0.2             131.2  
Corporate debt securities issued under the
FDIC Temporary Liquidity Guarantee Program
    100.9       0.1             101.0  
Corporate debt securities
    39.9                   39.9  
Foreign government securities
    14.6                   14.6  
 
                       
Total debt securities
    287.4       0.3             287.7  
Certificates of deposit
    10.0                   10.0  
 
                       
Total marketable securities, available-for-sale
  $ 297.4     $ 0.3     $     $ 297.7  
 
                       
     Of the $297.1 million in marketable securities at June 30, 2011, $172.1 million mature in the next twelve months and $125.0 million mature between twelve and twenty-four months. Gains and losses realized upon the sale of marketable securities are determined by specific identification and are included in homebuilding other income. The Company’s realized gains related to these sales during the three and nine months ended June 30, 2011 were $0 and $0.1 million, respectively.