4. Cash, Cash Equivalents and Investments

The Company's cash equivalents and short-term investments as of December 28, 2013 consisted of municipal bonds, money market funds, variable-rate demand notes, corporate bonds, certificates of deposit, commercial paper and asset backed securities. The Company's long-term investments consisted of auction-rate securities. In fiscal 2008, auctions for many of the Company's auction-rate securities failed because sell orders exceeded buy orders. As of December 28, 2013, the Company held $12.4 million par value auction-rate securities, all of which have experienced failed auctions. The underlying assets of the securities consisted of student loans and municipal bonds, of which $10.4 million were guaranteed by the U.S. government and the remaining $2.0 million were privately insured. As of December 28, 2013, $6.0 million had credit ratings of AA, $2.0 million had a credit rating of A and $4.4 million of the auction-rate securities had credit ratings of BBB. These securities have contractual maturity dates ranging from 2033 to 2046 at December 28, 2013. The Company is receiving the underlying cash flows on all of its auction-rate securities. The principal amounts associated with failed auctions are not expected to be accessible until a successful auction occurs, the issuer redeems the securities, a buyer is found outside of the auction process or the underlying securities mature. The Company is unable to predict if these funds will become available before their maturity dates.

The Company does not expect to need access to the capital represented by any of its auction-rate securities prior to their maturities. The Company does not intend to sell, and believes it is not more likely than not that it will be required to sell, its auction-rate securities before their anticipated recovery in market value or final settlement at the underlying par value. The Company believes that the credit ratings and credit support of the security issuers indicate that they have the ability to settle the securities at par value. As such, the Company has determined that no other-than-temporary impairment losses existed as of December 28, 2013.

The Company's cash, cash equivalents and investments consisted of the following (in thousands):

	December 28, 2013

	Cost		Gross Unrealized Losses			Gross Unrealized Gains		Fair Value
Cash and Cash Equivalents:
Cash on hand	$	45,544	$	—		$	—	$	45,544
Available-for-sale securities:
Money market funds		39,538		—			—		39,538
Certificates of deposit		7,768		—			—		7,768
Commercial paper		2,499		—			—		2,499
Municipal bonds		451		—			—		451

Total available-for-sale securities		50,256		—			—		50,256

Total cash and cash equivalents	$	95,800	$	—		$	—	$	95,800


Short-term Investments:
Available-for-sale securities:
Municipal bonds	$	119,289	$	(11	)	$	182	$	119,460
Variable-rate demand notes		38,025		—			—		38,025
Corporate bonds		17,788		(4	)		60		17,844
Commercial paper		3,748		—			—		3,748
Asset-backed securities		515		—			1		516

Total short-term investments	$	179,365	$	(15	)	$	243	$	179,593


Long-term Investments:
Available-for-sale securities:
Auction rate securities	$	12,425	$	(1,793	)	$	—	$	10,632

Total long-term investments	$	12,425	$	(1,793	)	$	—	$	10,632

	December 29, 2012

	Cost		Gross Unrealized Losses			Gross Unrealized Gains		Fair Value
Cash and Cash Equivalents:
Cash on hand	$	56,690	$	—		$	—	$	56,690
Available-for-sale securities:
U.S. Treasury bills		25,049		—			1		25,050
Money market funds		22,685		—			1		22,686
Municipal bonds		1,000		—			—		1,000

Total available-for-sale securities		48,734		—			2		48,736

Total cash and cash equivalents	$	105,424	$	—		$	2	$	105,426


Short-term Investments:
Available-for-sale securities:
Corporate bonds	$	59,089	$	(5	)	$	267	$	59,351
Municipal bonds		45,646		(7	)		50		45,689
Variable-rate demand notes		41,785		—			—		41,785
Asset-backed securities		15,058		—			11		15,069
U.S. government bonds		12,638		—			25		12,663
International government bonds		1,991		—			17		2,008

Total short-term investments	$	176,207	$	(12	)	$	370	$	176,565


Long-term Investments:
Available-for-sale securities:
Auction rate securities	$	12,525	$	(1,156	)	$	—	$	11,369

Total long-term investments	$	12,525	$	(1,156	)	$	—	$	11,369

The available-for-sale investments that were in a continuous unrealized loss position, aggregated by length of time that individual securities have been in a continuous loss position, were as follows (in thousands):

	Less Than 12 Months					12 Months or Greater					Total

As of December 28, 2013	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Municipal bonds	$	11,079	$	(11	)	$	—	$	—		$	11,079	$	(11	)
Auction rate securities		—		—			10,632		(1,793	)		10,632		(1,793	)
Corporate bonds		2,605		(4	)		—		—			2,605		(4	)

	$	13,684	$	(15	)	$	10,632	$	(1,793	)	$	24,316	$	(1,808	)

	Less Than 12 Months					12 Months or Greater					Total

As of December 29, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Municipal bonds	$	17,152	$	(7	)	$	—	$	—		$	17,152	$	(7	)
Auction rate securities		—		—			11,369		(1,156	)		11,369		(1,156	)
Corporate bonds		9,543		(5	)		—		—			9,543		(5	)

	$	26,695	$	(12	)	$	11,369	$	(1,156	)	$	38,064	$	(1,168	)

The gross unrealized losses as of December 28, 2013 and December 29, 2012 were due primarily to the illiquidity of the Company's auction-rate securities and, to a lesser extent, to changes in market interest rates.

The following summarizes the contractual underlying maturities of the Company's available-for-sale investments at December 28, 2013 (in thousands):

	Cost		Fair Value

Due in one year or less	$	115,109	$	115,177
Due after one year through ten years		80,987		81,147
Due after ten years		45,950		44,157

	$	242,046	$	240,481