Investments (Tables)

12 Months Ended

Dec. 28, 2013

Investments [Abstract]

Investments of marketable debt securities

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

	December 28, 2013
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value(1)
U.S. Treasury securities	$	23,975	$	15	$	(1	)	$	23,989
Corporate bonds	35,804		3		(23		)	35,784
U.S. Agency bonds	19,517		10		(4		)	19,523
Municipal bonds	7,474		23		(2		)	7,495
	$	86,770	$	51	$	(30	)	$	86,791

	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

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

	December 28, 2013				December 29, 2012
	Amortized Cost		Fair Value(1)		Amortized Cost		Fair Value(1)
Marketable debt securities – current (due in less than one year)	$	52,122	$	52,159	$	51,238	$	51,264
Marketable debt securities – non-current (due in one to two years)	34,648		34,632		38,635		38,642
	$	86,770	$	86,791	$	89,873	$	89,906

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