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Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2011

Balance Sheet Information

Schedule of available-for-sale securities

		December 31, 2011
		Amortized Cost			Gains in Accumulated Other Comprehensive Income			Losses in Accumulated Other Comprehensive Income			Estimated Fair Value
Commercial paper		$	15,889		$	6		$	—		$	15,895
FDIC insured corporate bonds			187,336			169			—			187,505
Treasury bills			70,147			44			—			70,191
Total available-for-sale securities		$	273,372		$	219		$	—		$	273,591

		December 31, 2010
		Amortized Cost			Gains in Accumulated Other Comprehensive Income			Losses in Accumulated Other Comprehensive Income			Estimated Fair Value
Commercial paper		$	128,527		$	61		$	—		$	128,588
FDIC insured corporate bonds			129,353			24			—			129,377
Treasury bills			136,203			12			—			136,215
Total available-for-sale securities		$	394,083		$	97		$	—		$	394,180

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

		Estimated Fair Value
Due in one year or less		$	37,088
Due in 1-2 years			236,503
Total investments in debt securities		$	273,591

Schedule of inventories

		December 31, 2011			December 31, 2010
Raw materials		$	57,169		$	49,953
Work in process			20,118			33,181
Finished goods			36,147			25,353
		$	113,434		$	108,487

Schedule of property, plant and equipment

		December 31,
								Estimated Useful Lives
		2011			2010
Land		$	12,535		$	7,274
Buildings and improvements			34,589			30,731		10-40 years
Machinery and equipment			102,241			73,173		3-10 years
Leasehold improvements			6,025			2,276		3-7 years
Gross property, plant, and equipment at cost			155,390			113,454
Less: accumulated depreciation and amortization			69,323			71,134
Net property, plant, and equipment at cost		$	86,067		$	42,320

Schedule of changes in goodwill

		Year ended December 31,
		2011			2010
Beginning Balance		$	52,003		$	52,003
Write-off (see Note 3)			(10,836	)		—
Acquisition (see Note 5)			14,661			—
Ending Balance		$	55,828		$	52,003

Schedule of intangible assets

		December 31, 2011									December 31, 2010
		Purchased technology			Other intangible assets			Total intangible assets			Purchased technology			Other intangible assets			Total intangible assets
Gross intangible assets		$	109,248		$	19,635		$	128,883		$	98,473		$	22,734		$	121,207
Less accumulated amortization			(89,620	)		(13,381	)		(103,001	)		(86,376	)		(17,938	)		(104,314	)
Intangible assets, net		$	19,628		$	6,254		$	25,882		$	12,097		$	4,796		$	16,893

Schedule of estimated aggregate amortization expense for intangible assets with definite useful lives

2012		$	4,538
2013			3,286
2014			2,961
2015			2,859
2016			2,671

Schedule of accrued expenses

		December 31,
		2011			2010
Payroll and related benefits		$	19,017		$	27,374
Sales, use, income and other taxes			6,315			4,914
Customer deposits and advanced billings			57,075			129,225
Warranty			9,778			9,238
Restructuring liability			956			714
Other			14,515			11,545
		$	107,656		$	183,010

Schedule of changes in warranty liability

		Year ended December 31,
		2011			2010
Balance as of the beginning of year		$	9,238		$	6,675
Warranties issued during the year			12,465			9,695
Settlements made during the year			(11,925	)		(7,132	)
Balance as of the end of year		$	9,778		$	9,238

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