Cash And Cash Equivalents And Investments (Tables)

3 Months Ended

Mar. 31, 2012

Cash And Cash Equivalents And Investments [Abstract]

Summary Of Cash And Cash Equivalents And Investments By Balance Sheet Classification


	March 31, 2012				December 31, 2011
	Amortized Cost		Fair Value ⁽¹⁾		Amortized Cost		Fair Value ⁽¹⁾
Cash and cash equivalents	$	220,006	$	220,006	$	192,165	$	192,165
Short-term investments		43,115		43,194		36,688		36,774
Long-term investments		19,014		19,166		24,964		24,832

Total cash and cash equivalents and investments	$	282,135	$	282,366	$	253,817	$	253,771

(1)	See Note 16 – Fair Value Measurements for details regarding fair value measurements.

Summary Of Investments By Investment Category


	March 31, 2012
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	9,496	$	—	$	(1	)	$	9,495
US agency securities		3,515		17		—			3,532
Corporate notes/bonds		47,397		231		(16	)		47,612
Certificates/term deposits		1,721		—		—			1,721

Total investments	$	62,129	$	248	$	(17	)	$	62,360


	December 31, 2011
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	6,920	$	1	$	—		$	6,921
US agency securities		5,526		25		—			5,551
Corporate notes/bonds		47,600		124		(196	)		47,528
Certificates/term deposits		1,606		—		—			1,606

Total investments	$	61,652	$	150	$	(196	)	$	61,606

- Definition

Tabular disclosure of investments in certain debt and equity securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Debt Security

-URI http://asc.fasb.org/extlink&oid=6509901

-Topic 320

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 3, 19, 20, 21, 22, 137

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

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+ Details