Organization and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Organization and Significant Accounting Policies

Schedule of property, plant and equipment at cost

	December 31,
	2011			2010
Equipment and computer software	$	42,422		$	38,685
Building and building systems	48,431			—
Land improvements	2,822			—
Leasehold improvements	34,839			25,147
Furniture and fixtures	5,323			2,550
	133,837			66,382
Less accumulated depreciation	(47,420		)	(40,826		)
	86,417			25,556
Land	10,198			10,147
	$	96,615		$	35,703

Schedule of property, plant and equipment estimated useful life

Computer software and hardware	3 years
Manufacturing Equipment	10 years
Other Equipment	5-7 years
Furniture and fixtures	5-10 years
Building	40 years
Building systems and improvements	10-25 years
Land improvements	20 years

Schedule of estimated amortization expense related to patents

Years Ending December 31,	Amortization
	(in millions)
2012	$	1.5
2013	$	1.0
2014	$	0.8
2015	$	0.6
2016	$	0.6

Schedule of assets measured at fair value on a recurring basis

	At December 31, 2011		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash equivalents (1)	$	58,892	$	55,893	$	2,999	$	—
Corporate debt securities (2)	166,922		—		166,922		—
Debt securities issued by U.S. government agencies (2)	80,440		—		80,440		—
Debt securities issued by the U.S. Treasury (2)	2,356		2,356		—		—
Debt securities issued by states of the United States and political subdivisions of the states (2)	28,469		—		28,469		—
Equity securities (3)	1,282		1,282		—		—
Total	$	338,361	$	59,531	$	278,830	$	—

	At December 31, 2010		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash equivalents (1)	$	68,618	$	50,379	$	18,239	$	—
Corporate debt securities (2)	244,228		—		244,228		—
Debt securities issued by U.S. government agencies (2)	127,041		—		127,041		—
Debt securities issued by the U.S. Treasury (2)	24,040		24,040		—		—
Debt securities issued by states of the United States and political subdivisions of the states (2)	6,992		—		6,992		—
Equity securities (3)	2,011		2,011		—		—
Total	$	472,930	$	76,430	$	396,500	$	—

(1)Included in cash and cash equivalents on our consolidated balance sheet.

(2)Included in short-term investments on our consolidated balance sheet.

(3)Included in other current assets on our consolidated balance sheet.