Investments (Tables)

12 Months Ended

Dec. 29, 2012

Available-For-Sale Investments

The amortized cost and fair values of available-for-sale investments are as follows at December 29, 2012 and December 31, 2011 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
December 29, 2012
Money market investments	$	2,865	$	—	$	—	$	2,865
Mortgage-backed securities		2,175		73		—		2,248
Corporate bonds and direct obligations of government agencies		69,173		1,294		6		70,461
U.S. Treasury obligations		16,782		47		1		16,828
Total	$	90,995	$	1,414	$	7	$	92,402
December 31, 2011
Money market investments	$	1,989	$	—	$	—	$	1,989
Mortgage-backed securities		3,017		61		18		3,060
Corporate bonds and direct obligations of government agencies		51,014		819		126		51,707
U.S. Treasury obligations		11,682		51		1		11,732
Total	$	67,702	$	931	$	145	$	68,488

Schedule of Unrealized Loss On Investments

For those available-for-sale investments with unrealized losses at December 29, 2012 and December 31, 2011, the following table summarizes the duration of the unrealized loss (in thousands):

	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
December 29, 2012
Corporate bonds and direct obligations of government agencies	$	3,387	$	6	$	—	$	—	$	3,387	$	6
U.S. Treasury obligations		770		1		—		—		770		1
Total	$	4,157	$	7	$	—	$	—	$	4,157	$	7
December 31, 2011
Mortgage-backed securities	$	468	$	18	$	—	$	—	$	468	$	18
Corporate bonds and direct obligations of government agencies		6,067		126		—		—		6,067		126
U.S. Treasury obligations		591		1		—		—		591		1
Total	$	7,126	$	145	$	—	$	—	$	7,126	$	145