Cash, Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 28, 2013

Cash, Cash Equivalents and Investments

Schedule of cash, cash equivalents, and investments

  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

Schedule of available-for-sale investments in continuous unrealized loss position by length of time

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	)

Summarization of contractual underlying maturities of available-for-sale investments

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