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Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2012

Balance Sheet Information

Schedule of available-for-sale securities

		March 31, 2012
		Amortized Cost			Gains in Accumulated Other Comprehensive Income			Losses in Accumulated Other Comprehensive Income			Estimated Fair Value
Government Agency Securities		$	54,782		$	44		$	—		$	54,826
FDIC insured corporate bonds		106,331			45			—			106,376
Treasury bills		86,626			—			(2		)	86,624
Total available-for-sale securities		$	247,739		$	89		$	(2	)	$	247,826

		December 31, 2011
		Amortized Cost			Gains in Accumulated Other Comprehensive Income			Losses in Accumulated Other Comprehensive Income			Estimated Fair Value
Government Agency Securities		$	88,585		$	119		$	—		$	88,704
FDIC insured corporate bonds		114,640			56			—			114,696
Treasury bills		70,147			44			—			70,191
Total available-for-sale securities		$	273,372		$	219		$	—		$	273,591

Schedule of contractual maturities of available-for-sale debt securities

		Estimated Fair Value
Due in one year or less		$	33,272
Due in 1—2 years		214,554
Total investments in debt securities		$	247,826

Schedule of inventories

		March 31,			December 31,
		2012			2011
Raw materials		$	60,786		$	57,169
Work in process		25,714			20,118
Finished goods		16,776			36,147
		$	103,276		$	113,434

Schedule of changes in warranty liability

		March 31,
		2012			2011
Balance as of the beginning of period		$	9,778		$	9,238
Warranties issued during the period		1,007			3,014
Settlements made during the period		(1,951		)	(2,121		)
Balance as of the end of period		$	8,834		$	10,131

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Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

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- Definition

Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

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- Definition

Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Topic

-SubTopic

-Publisher SEC

-Number 210

-Article 5

-Subparagraph a,b,c

-Name Regulation S-X (SX)

-Paragraph 6

-Section 2

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Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Topic 460

-SubTopic 10

-Publisher FASB

-Number

-Article

-Subparagraph

-Name Accounting Standards Codification

-Paragraph 8

-Section 50

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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