Fair Value Measurements (Tables)

3 Months Ended

Mar. 30, 2013

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following tables set forth by level within the fair value hierarchy, our financial assets that were accounted for at fair value on a recurring basis at March 30, 2013, and December 29, 2012, according to the valuation techniques we used to determine their fair value (in thousands):



	March 30, 2013
	Level 1		Level 2		Level 3		Total
Marketable debt securities – current
U.S. Treasury securities	$	17,524	$	—	$	—	$	17,524
Corporate bonds	—		27,745		—		27,745
U.S. Agency bonds	—		10,051		—		10,051
Municipal bonds	—		2,536		—		2,536
	17,524		40,332		—		57,856
Marketable debt securities – non-current
U.S. Treasury securities	15,008		—		—		15,008
Corporate bonds	—		10,466		—		10,466
U.S. Agency bonds	—		10,047		—		10,047
Municipal bonds	—		3,179		—		3,179
	15,008		23,692		—		38,700
	$	32,532	$	64,024	$	—	$	96,556



	December 29, 2012
	Level 1		Level 2		Level 3		Total
Marketable debt securities – current
U.S. Treasury securities	$	17,538	$	—	$	—	$	17,538
Corporate bonds	—		21,549		—		21,549
U.S. Agency bonds	—		7,586		—		7,586
Municipal bonds	—		4,591		—		4,591
	17,538		33,726		—		51,264
Marketable debt securities – non-current
U.S. Treasury securities	15,004		—		—		15,004
Corporate bonds	—		10,359		—		10,359
U.S. Agency bonds	—		10,056		—		10,056
Municipal bonds	—		3,223		—		3,223
	15,004		23,638		—		38,642
	$	32,542	$	57,364	$	—	$	89,906