Marketable Debt Securities (Notes)

3 Months Ended

Mar. 30, 2013

Marketable Debt Securities

Investments in marketable debt securities were comprised of the following (in thousands):



	March 30, 2013
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value⁽¹⁾
U.S. Treasury securities	$	32,510	$	22	$	—		$	32,532
Corporate bonds	38,224		7		(20		)	38,211
U.S. Agency bonds	20,088		12		(2		)	20,098
Municipal bonds	5,713		3		(1		)	5,715
	$	96,535	$	44	$	(23	)	$	96,556



	December 29, 2012
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value⁽¹⁾
U.S. Treasury securities	$	32,518	$	24	$	—		$	32,542
Corporate bonds	31,929		2		(23		)	31,908
U.S. Agency bonds	17,632		11		(1		)	17,642
Municipal bonds	7,794		20		—			7,814
	$	89,873	$	57	$	(24	)	$	89,906

Maturities of marketable debt securities were as follows (in thousands):



	March 30, 2013				December 29, 2012
	Amortized Cost		Fair Value⁽¹⁾		Amortized Cost		Fair Value⁽¹⁾
Marketable debt securities – current (due in less than one year)	$	57,851	$	57,856	$	51,238	$	51,264
Marketable debt securities – non-current (due in one to two years)	38,684		38,700		38,635		38,642
	$	96,535	$	96,556	$	89,873	$	89,906

⁽¹⁾ See Note 2 for discussion of fair value measurements.

During three months ended March 30, 2013, $5.8 million of marketable debt securities matured and were redeemed at face value. During the three months ended March 31, 2012, there were no sales or maturities of marketable debt securities. During the three months ended March 30, 2013, there were no other-than-temporary declines in market value.