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Fair Value Measurements (Tables)
9 Months Ended
Sep. 29, 2013
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of September 29, 2013 (in thousands):

 

     Quoted Prices in
Active Markets
for Identical
Assets (Level 1)
     Significant Other
Observable

Inputs (Level 2)
 

Assets:

     

Corporate stock

   $ 1,864       $ —     

Money market instruments

     225         —     

Corporate bonds

     —           210,341   

Asset-backed securities

     —           69,928   

Treasury bills

     —           69,277   

Sovereign bonds

     —           29,923   

Municipal bonds

     —           28,005   

Agency bonds

     —           1,499   

Currency forward contracts

     —           81   

Liabilities:

     

Currency forward contracts

     —           64