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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 29, 2012
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Instruments
Fair Value of Financial Instruments (in thousands):

 
Fair value measurements as of
December 29, 2012
 
Fair value measurements as of
 December 31, 2011
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
Short-term marketable securities
$
64,865

 
$
64,865

 
$

 
$

 
$
68,711

 
$
68,711

 
$

 
$

Long-term marketable securities
4,717

 

 

 
4,717

 
6,946

 

 

 
6,946

Foreign currency forward exchange contracts
(5
)
 

 
(5
)
 

 
18

 

 
18

 

Total fair value of financial instruments
$
69,577

 
$
64,865

 
$
(5
)
 
$
4,717

 
$
75,675

 
$
68,711

 
$
18

 
$
6,946

Schedule of Changes In Level 3 Instruments
During the fiscal years ended December 29, 2012 and December 31, 2011, the following changes occurred in our Level 3 instruments (in thousands):
 
 
Year Ended
 
December 29,
2012
 
December 31,
2011
Beginning fair value of Long-term marketable securities
$
6,946

 
$
10,232

Fair value of securities sold or redeemed
(2,285
)
 
(2,843
)
Temporary fluctuations in fair value
56

 
(443
)
Ending fair value of Long-term marketable securities
$
4,717

 
$
6,946