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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 29, 2012
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The fair value of these certain financial assets and liabilities was determined using the following inputs at September 29, 2012 and December 31, 2011, respectively:
 
 
Fair Value Measurements at September 29, 2012 Using
(In thousands)
Total
 
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Available-for-sale securities(1)
 
 
 
 
 
 
 
Commercial paper
$
17,997

 
$
—

 
$
17,997

 
$
—

Money market funds
5,318

 
5,318

 
—

 
—

U.S. treasury bills and notes
4,026

 
—

 
4,026

 
—

Securities and obligations of U.S. government agencies
198,547

 
—

 
198,547

 
—

 
225,888

 
5,318

 
220,570

 
—

Foreign currency derivatives(2)
8

 
—

 
8

 
—

Foreign currency derivatives(3)
(19
)
 
—

 
(19
)
 
—

 
$
225,877

 
$
5,318

 
$
220,559

 
$
—

 
 
 
 
 
 
 
 
 
Fair Value Measurements at December 31, 2011 Using
(In thousands)
Total
 
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Available-for-sale securities(1)
 
 
 
 
 
 
 
Commercial paper
$
9,996

 
$
—

 
$
9,996

 
$
—

Money market funds
6,706

 
6,706

 
—

 
—

 U.S. corporate debt securities
1,440

 
—

 
1,440

 
—

U.S. treasury bills and notes
3,913

 
—

 
3,913

 
—

Securities and obligations of U.S. government agencies
162,669

 
—

 
162,669

 
—

 
184,724

 
6,706

 
178,018

 
—

Foreign currency derivatives(2)
3

 
—

 
3

 
—

Foreign currency derivatives(3)
(1
)
 
—

 
(1
)
 
—

 
$
184,726

 
$
6,706

 
$
178,020

 
$
—

________________ 
(1)
Included in cash and cash equivalents and short-term investments on our condensed consolidated balance sheet. See “Investments” in Note 6 for further details.
(2)
Included in other current assets on our condensed consolidated balance sheet. Consisted of forward foreign exchange contracts for the Japanese yen. See “Derivative Instruments and Hedging” in Note 7 for further details.
(3)
Included in other current liabilities on our condensed consolidated balance sheet. Consisted of forward foreign exchange contracts for the Japanese yen. See “Derivative Instruments and Hedging” in Note 7 for further details.