Cash, Cash Equivalents, and Investments (Tables)

9 Months Ended

Sep. 29, 2013

Cash And Cash Equivalents [Abstract]

Components of Cash, Cash Equivalents, and Investments

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

	September 29, 2013		December 31, 2012
Cash	$	30,221	$	34,986
Cash equivalents		—		5,098
Money market instruments		225		5,076
Cash and cash equivalents		30,446		45,160
Corporate bonds		104,720		46,001
Asset-backed securities		41,269		17,666
Municipal bonds		17,013		16,224
Treasury bills		11,654		5,997
Sovereign bonds		8,553		3,986
Corporate stock		1,864		2,131
Agency bonds		1,499		7,482
Covered bonds		—		5,618
Short-term investments		186,572		105,105
Corporate bonds		105,621		100,072
Treasury bills		57,623		36,276
Asset-backed securities		28,659		34,710
Sovereign bonds		21,370		10,606
Municipal bonds		10,992		17,846
Agency bonds		—		29,441
Covered bonds		—		5,564
Limited partnership interest (accounted for using cost method)		2,455		3,740
Long-term investments		226,720		238,255
	$	443,738	$	388,520

Summary of Available-for-Sale Investments

The following tables summarize the Company’s available-for-sale investments as of September 29, 2013 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Corporate bonds	$	104,580	$	270	$	(130	)	$	104,720
Asset-backed securities		41,600		7		(338	)		41,269
Municipal bonds		16,969		44		—			17,013
Treasury bills		11,647		7		—			11,654
Sovereign bonds		8,554		9		(10	)		8,553
Agency bonds		1,500		—		(1	)		1,499
Long-term:
Corporate bonds		105,251		513		(143	)		105,621
Treasury bills		57,604		24		(5	)		57,623
Asset-backed securities		28,810		10		(161	)		28,659
Sovereign bonds		21,386		57		(73	)		21,370
Municipal bonds		10,957		45		(10	)		10,992
	$	408,858	$	986	$	(871	)	$	408,973

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

	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	$	62,910	$	(272	)	$	2,455	$	(1	)	$	65,365	$	(273	)
Asset- backed securities		41,848		(102	)		16,332		(397	)		58,180		(499	)
Sovereign bonds		9,300		(25	)		888		(58	)		10,188		(83	)
Treasury bills		7,614		(5	)		—		—			7,614		(5	)
Municipal bonds		4,374		(10	)		—		—			4,374		(10	)
Agency bonds		1,499		(1	)		—		—			1,499		(1	)
	$	127,545	$	(415	)	$	19,675	$	(456	)	$	147,220	$	(871	)

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 September 29, 2013 (in thousands):

	<1 Year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		Total
Corporate bonds	$	104,720	$	61,596	$	41,299	$	2,203	$	523	$	210,341
Asset-backed securities		41,269		28,659		—		—		—		69,928
Treasury bills		11,654		48,015		9,608		—		—		69,277
Sovereign bonds		8,553		9,571		10,911		—		888		29,923
Municipal bonds		17,013		4,576		4,531		1,385		500		28,005
Agency bonds		1,499		—		—		—		—		1,499
	$	184,708	$	152,417	$	66,349	$	3,588	$	1,911	$	408,973