Cash, Cash Equivalents, and Investments (Tables)

9 Months Ended

Oct. 04, 2015

Cash and Cash Equivalents [Abstract]

Components of Cash, Cash Equivalents, and Investments

Cash, cash equivalents, and investments consisted of the following (in thousands):

	October 4, 2015		December 31, 2014
Cash	$	47,146	$	54,917
Money market instruments	32,417		777
Cash and cash equivalents	79,563		55,694
Treasury bills	82,401		—
Euro liquidity fund	63,672		48,235
Asset-backed securities	60,992		1,311
Corporate bonds	45,170		30,889
Agency bonds	10,980		6,883
Sovereign bonds	7,568		—
Municipal bonds	1,801		1,237
Supranational bonds	—		1,901
Short-term investments	272,584		90,456
Corporate bonds	181,842		216,294
Asset-backed securities	28,254		62,556
Treasury bills	16,580		90,412
Municipal bonds	4,884		6,600
Sovereign bonds	4,702		13,461
Agency bonds	3,300		9,566
Limited partnership interest	942		1,956
Long-term investments	240,504		400,845
	$	592,651	$	546,995

Summary of Available-for-Sale Investments

The following table summarizes the Company’s available-for-sale investments as of October 4, 2015 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Treasury bills	$	82,334	$	67	$	—		$	82,401
Euro liquidity fund	63,667		5		—			63,672
Asset-backed securities	60,989		20		(17		)	60,992
Corporate bonds	45,182		56		(68		)	45,170
Agency bonds	10,979		1		—			10,980
Sovereign bonds	7,561		7		—			7,568
Municipal bonds	1,800		1		—			1,801
Long-term:
Corporate bonds	182,509		240		(907		)	181,842
Asset-backed securities	28,257		31		(34		)	28,254
Treasury bills	16,521		59		—			16,580
Municipal bonds	4,851		33		—			4,884
Sovereign bonds	4,696		6		—			4,702
Agency bonds	3,299		1		—			3,300
	$	512,645	$	527	$	(1,026	)	$	512,146

Gross Unrealized Losses and Fair Values for Available-for-Sale Investments

The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of October 4, 2015 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	118,452	$	(879	)	$	6,935	$	(96	)	$	125,387	$	(975	)
Asset-backed securities	48,781		(47		)	2,334		(4		)	51,115		(51		)
	$	167,233	$	(926	)	$	9,269	$	(100	)	$	176,502	$	(1,026	)

Effective Maturity Dates of Available-for-Sale Investments

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of October 4, 2015 (in thousands):

	1 Year or Less		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-8 Years		Total
Corporate bonds	$	45,170	$	95,528	$	65,060	$	17,922	$	3,332	$	—	$	227,012
Treasury bills	82,401		5,099		11,481		—		—		—		98,981
Asset-backed securities	60,992		5,675		9,768		5,717		6,618		476		89,246
Euro liquidity fund	63,672		—		—		—		—		—		63,672
Agency bonds	10,980		—		3,300		—		—		—		14,280
Sovereign bonds	7,568		4,702				—		—		—		12,270
Municipal bonds	1,801		4,884		—		—		—		—		6,685
	$	272,584	$	115,888	$	89,609	$	23,639	$	9,950	$	476	$	512,146