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Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 30, 2013
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Instruments
Fair Value of Financial Instruments (in thousands):

 
Fair value measurements as of
March 30, 2013
 
Fair value measurements as of
 December 29, 2012
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
Short-term marketable securities
$
73,550

 
$
73,550

 
$

 
$

 
$
64,865

 
$
64,865

 
$

 
$

Long-term marketable securities
4,717

 

 

 
4,717

 
4,717

 

 

 
4,717

Foreign currency forward exchange contracts
(17
)
 

 
(17
)
 

 
(5
)
 

 
(5
)
 

Total fair value of financial instruments
$
78,250

 
$
73,550

 
$
(17
)
 
$
4,717

 
$
69,577

 
$
64,865

 
$
(5
)
 
$
4,717

Schedule of Changes In Level 3 Instruments
During the three months ended March 30, 2013 and March 31, 2012, the following changes occurred in our Level 3 instruments (in thousands):

 
 
Three Months Ended
 
March 30,
2013
 
March 31,
2012
Beginning fair value of Long-term marketable securities
$
4,717

 
$
6,946

Fair value of securities sold or redeemed

 

Ending fair value of Long-term marketable securities
$
4,717

 
$
6,946