Cash, Cash Equivalents and Investments (Tables)

9 Months Ended

Sep. 29, 2012

Cash, Cash Equivalents and Investments

Schedule of cash, cash equivalents, and investments

	September 29, 2012
	Cost		Gross Unrealized Losses			Gross Unrealized Gains		Fair Value
Cash and Cash Equivalents:
Cash on hand	$	54,887	$	—		$	—	$	54,887
Available-for-sale securities:
Money market funds	54,619		—			—		54,619
U.S. Treasury bills	15,999		—			—		15,999
Total available-for-sale securities	70,618		—			—		70,618
Total cash and cash equivalents	$	125,505	$	—		$	—	$	125,505
Short-term Investments:
Available-for-sale securities:
Corporate bonds	$	62,824	$	(1	)	$	326	$	63,149
Municipal bonds	29,952		(2		)	60		30,010
Variable-rate demand notes	19,280		—			1		19,281
U.S. government bonds	12,642		—			28		12,670
Asset-backed securities	11,978		—			19		11,997
U.S. Treasury bills	8,499		—			—		8,499
International government bonds	2,950		—			17		2,967
Total short-term investments	$	148,125	$	(3	)	$	451	$	148,573
Long-term Investments:
Available-for-sale securities:
Auction rate securities	$	12,525	$	(1,107	)	$	—	$	11,418
Total long-term investments	$	12,525	$	(1,107	)	$	—	$	11,418

	December 31, 2011
	Cost		Gross Unrealized Losses			Gross Unrealized Gains		Fair Value
Cash and Cash Equivalents:
Cash on hand	$	44,113	$	—		$	—	$	44,113
Available-for-sale securities:
Money market funds	50,851		—			—		50,851
Total cash and cash equivalents	$	94,964	$	—		$	—	$	94,964
Short-term Investments:
Available-for-sale securities:
Corporate bonds	$	75,189	$	(363	)	$	234	$	75,060
Municipal bonds	56,915		(12		)	81		56,984
Variable-rate demand notes	41,280		—			—		41,280
U.S. government agency	19,820		(12		)	28		19,836
U.S. Treasury bills	8,600		—			—		8,600
Asset-backed securities	5,743		(5		)	1		5,739
U.S. government bonds	2,507		—			—		2,507
Certificates of deposit	1,570		—			—		1,570
International government bonds	950		—			—		950
Total short-term investments	$	212,574	$	(392	)	$	344	$	212,526
Long-term Investments:
Available-for-sale securities:
Auction rate securities	$	19,225	$	(1,748	)	$	—	$	17,477
Total long-term investments	$	19,225	$	(1,748	)	$	—	$	17,477

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

	Less Than 12 Months					12 Months or Greater					Total
As of September 29, 2012	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Auction rate securities	$	—	$	—		$	11,418	$	(1,107	)	$	11,418	$	(1,107	)
Municipal bonds	5,217		(2		)	—		—			5,217		(2		)
Corporate bonds	1,119		(1		)	—		—			1,119		(1		)
	$	6,336	$	(3	)	$	11,418	$	(1,107	)	$	17,754	$	(1,110	)

	Less Than 12 Months					12 Months or Greater					Total
As of December 31, 2011	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate bonds	$	25,438	$	(363	)	$	—	$	—		$	25,438	$	(363	)
Auction rate securities	—		—			17,477		(1,748		)	17,477		(1,748		)
Municipal bonds	10,437		(12		)	—		—			10,437		(12		)
U.S. government agency	5,772		(12		)	—		—			5,772		(12		)
Asset-backed securities	4,539		(5		)	—		—			4,539		(5		)
	$	46,186	$	(392	)	$	17,477	$	(1,748	)	$	63,663	$	(2,140	)

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

	Cost		Fair Value
Due in one year or less	$	115,773	$	115,842
Due after one year through ten years	85,140		85,519
Due after ten years	30,355		29,248
	$	231,268	$	230,609