Short-Term Investments (Tables)

3 Months Ended

Mar. 29, 2013

Cash And Cash Equivalents [Abstract]

Summary of Short-Term Investments

The following table summarizes the Company’s short-term investments (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
As of March 29, 2013
Certificates of deposit	$	1,605	$	—	$	—		$	1,605
State, municipal and local government agencies bonds		59,137		56		(2	)		59,191
Corporate bonds		31,062		7		(22	)		31,047
Commercial paper		9,944		—		—			9,944
U.S. federal government bonds		8,003		1		(1	)		8,003
Total short-term investments	$	109,751	$	64	$	(25	)	$	109,790
As of December 31, 2012
Certificates of deposit	$	1,603	$	—	$	—		$	1,603
State, municipal and local government agencies bonds		59,009		45		(4	)		59,050
Corporate bonds		31,568		4		(10	)		31,562
Commercial paper		10,287		1		—			10,288
U.S. federal government bonds		2,003		—		—			2,003
Total short-term investments	$	104,470	$	50	$	(14	)	$	104,506

Maturities of Short-Term Investments

The following table summarizes the maturities of the Company’s short-term investments (in thousands):

	March 29, 2013		December 31, 2012
Less than one year	$	84,402	$	76,779
Due in 1 - 2 years		25,388		27,727
Total short-term investments	$	109,790	$	104,506