v2.4.0.6
Fair Value Measurements (Tables)
9 Months Ended
Oct. 31, 2012
Fair Value Measurements [Abstract]  
Information about assets that are measured at fair value on a recurring basis

We have no financial assets or liabilities measured using Level 3 inputs. The following tables present information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands):

 

                         
    Fair Value Measurements
at October 31, 2012
 

Description

  Level 1     Level 2     Total  

U.S. agency obligations

  $ —       $ 608,675     $ 608,675  

U.S. treasury securities

    70,146       —         70,146  

Commercial paper

    —         42,697       42,697  

Certificates of deposit

    —         250       250  

U.S. corporate securities

    —         12,027       12,027  

Municipal securities

    —         1,360       1,360  

Money market funds

    51,047       —         51,047  
   

 

 

   

 

 

   

 

 

 
    $ 121,193     $ 665,009     $ 786,202  
   

 

 

   

 

 

   

 

 

 

Included in cash and cash equivalents

                  $ 431,805  
                   

 

 

 

Included in marketable securities

                  $ 354,397  
                   

 

 

 
   
    Fair Value Measurements
at January 31, 2012
 

Description

  Level 1     Level 2     Total  

U.S. agency obligations

  $ —       $ 14,316     $ 14,316  

Commercial paper

    —         23,785       23,785  

U.S. corporate securities

    —         20,380       20,380  

Municipal securities

    —         15,125       15,125  

Money market funds

    27,152       —         27,152  
   

 

 

   

 

 

   

 

 

 
    $ 27,152     $ 73,606     $ 100,758  
   

 

 

   

 

 

   

 

 

 

Included in cash and cash equivalents

                  $ 47,124  
                   

 

 

 

Included in marketable securities

                  $ 53,634