Balance Sheet Account Details (Tables)

3 Months Ended

Apr. 01, 2012

Balance Sheet Account Details [Abstract]

Short-term Investments

The following is a summary of short-term investments (in thousands):

	April 1, 2012									January 1, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-sale securities:
Debt securities in government sponsored entities	$	402,474	$	441	$	(216	)	$	402,699	$	393,759	$	428	$	(148	)	$	394,039
Corporate debt securities	504,116		1,692		(379		)	505,429		432,550		1,293		(461		)	433,382
U.S. Treasury securities	98,020		111		(90		)	98,041		58,955		214		—			59,169
Total available-for-sale securities	$	1,004,610	$	2,244	$	(685	)	$	1,006,169	$	885,264	$	1,935	$	(609	)	$	886,590

Available-for-sale securities in unrealized loss positions

The following table shows the fair values and the gross unrealized losses of the Company’s available-for-sale securities that were in an unrealized loss position for less than twelve months as of April 1, 2012 and January 1, 2012 aggregated by investment category (in thousands):

	April 1, 2012					January 1, 2012
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Debt securities in government sponsored entities	$	144,029	$	(216	)	$	133,904	$	(148	)
Corporate debt securities	156,430		(378		)	138,326		(461		)
U.S. Treasury securities	62,444		(90		)	—		—
Total	$	362,903	$	(684	)	$	272,230	$	(609	)

Contractual maturities of available-for-sale securities

Contractual maturities of available-for-sale debt securities as of April 1, 2012 were as follows (in thousands):

	Estimated Fair Value
Due within one year	$	346,009
After one but within five years	660,160
Total	$	1,006,169

Inventory

Inventory, net, consists of the following (in thousands):

	April 1, 2012		January 1, 2012
Raw materials	$	55,386	$	58,340
Work in process	55,599		53,412
Finished goods	17,699		17,029
Total inventory, net	$	128,684	$	128,781

Accrued liabilities

Accrued liabilities consist of the following (in thousands):

	April 1, 2012		January 1, 2012
Deferred revenue, current portion	$	59,572	$	52,573
Accrued compensation expenses	41,759		52,035
Accrued taxes payable	23,336		19,339
Customer deposits	19,362		17,958
Reserve for product warranties	11,871		11,966
Deferred rent, current portion	8,943		11,042
Acquisition related contingent consideration liability, current portion	8,375		2,335
Facility exit obligation, current portion	4,389		4,408
Accrued unsolicited tender offer related expenses	3,165		—
Accrued royalties	2,757		5,682
Other accrued expenses	14,511		10,436
Total accrued liabilities	$	198,040	$	187,774