Fair Value (Tables)

3 Months Ended

Mar. 30, 2012

Fair Value [Abstract]

Financial assets measured at fair value on a recurring basis

The following table sets forth the fair value of the Company’s financial assets and liabilities measured at fair value on a recurring basis as of March 30, 2012 and December 31, 2011, based on the three-tier fair value hierarchy:

	Total		Level 1		Level 2		Level 3
	(In thousands)
March 30, 2012
Assets
Money market funds	$	37,680	$	37,680	$	—	$	—
Certificate of deposit		1,325		—		1,325		—
State, municipal and local government agencies bonds		47,825		—		47,825		—
Corporate bonds		22,213		—		22,213		—
U.S. federal government bonds		5,896		5,896		—		—
Commercial paper		10,181		—		10,181		—
Foreign exchange forward contracts		169		—		169		—
Total assets measured and recorded at fair value	$	125,289	$	43,576	$	81,713	$	—
Liabilities
Foreign exchange forward contracts	$	660	$	—	$	660	$	—
Total liabilities measured and recorded at fair value	$	660	$	—	$	660	$	—
	Total		Level 1		Level 2		Level 3
	(In thousands)
December 31, 2011
Assets
Money market funds	$	62,131	$	62,131	$	—	$	—
State, municipal and local government agencies bonds		38,825		—		38,825		—
Corporate bonds		18,604		—		18,604		—
U.S. federal government bonds		9,230		9,230		—		—
Commercial paper		4,195		—		4,195		—
Foreign exchange forward contracts		373		—		373		—
Total assets measured and recorded at fair value	$	133,358	$	71,361	$	61,997	$	—
Liabilities
Foreign exchange forward contracts	$	159	$	—	$	159	$	—
Total liabilities measured and recorded at fair value	$	159	$	—	$	159	$	—

Maturities of short-term investments

At March 30, 2012 and December 31, 2011, maturities of short-term investments are as follows:

	March 30, 2012		December 31, 2011
	(In thousands)
Short-term investments:
Less than one year	$	69,085	$	43,470
Due in 1—2 years		18,355		27,384
Total short-term investments	$	87,440	$	70,854

Summary of available-for-sale securities

The following is a summary of available-for-sale securities at March 30, 2012 and December 31, 2011:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
			(In thousands)
March 30, 2012
Certificate of deposit	$	1,324	$	1	$	—		$	1,325
State, municipal and local government agencies bonds		47,758		67		—			47,825
Corporate bonds		22,208		12		(7	)		22,213
U.S. federal government bonds		5,895		1		—			5,896
Commercial paper		10,181		—		—			10,181
Total	$	87,366	$	81	$	(7	)	$	87,440
December 31, 2011
State, municipal and local government agencies bonds	$	38,785	$	46	$	(6	)	$	38,825
Corporate bonds		18,613		6		(15	)		18,604
U.S. federal government bonds		9,226		4		—			9,230
Commercial paper		4,195		—		—			4,195
Total	$	70,819	$	56	$	(21	)	$	70,854