Investments (Tables)

6 Months Ended

Jun. 25, 2011

Investments

Available For Sale Investments

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
June 25, 2011
Money market investments	$	1,536	$	—	$	—	$	1,536
Mortgage-backed securities		3,105		91		—		3,196
Corporate bonds and direct obligations of government agencies		53,717		1,107		8		54,816
U.S. Treasury obligations		13,008		24		—		13,032
Total	$	71,366	$	1,222	$	8	$	72,580
December 25, 2010
Money market investments	$	535	$	—	$	—	$	535
Mortgage-backed securities		3,458		64		8		3,514
Corporate bonds and direct obligations of government agencies		60,330		872		151		61,051
U.S. Treasury obligations		12,584		6		23		12,567
Total	$	76,907	$	942	$	182	$	77,667

Schedule Of Unrealized Loss On Investments

	Less than 12 months				12 months or longer				Total
	Fair Market Value		Unrealized Loss		Fair Market Value		Unrealized Loss		Fair Market Value		Unrealized Loss
June 25, 2011
Corporate bonds and direct obligations of government agencies	$	2,143	$	8	$	—	$	—	$	2,143	$	8
December 25, 2010
Mortgage-backed securities	$	225	$	8	$	—	$	—	$	225	$	8
Corporate bonds and direct obligations of government agencies		11,615		151		—		—		11,615		151
U.S. Treasury obligations		774		23		—		—		774		23
Total	$	12,614	$	182	$	—	$	—	$	12,614	$	182