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Cash and Investments in Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Cash and Investments in Marketable Securities, Including Cash Equivalents

Cash and investments in marketable securities, including cash equivalents, are as follows (in thousands).

		Estimated Fair Value at
		March 31, 2016				December 31, 2015
Cash and cash equivalents		$	72,549			$	55,570
Short-term investments			215,776				253,374
Total cash and investments in marketable securities		$	288,325			$	308,944

Portfolio of Cash and Investments in Marketable Securities

Our portfolio of cash and investments in marketable securities includes (in thousands):

						Estimated Fair Value at
		Fair Value Hierarchy Level				March 31, 2016				December 31, 2015
Corporate notes and bonds			2			$	132,824			$	181,969
Corporate commercial paper			2				63,114				61,150
Obligations of U.S. government agencies			2				16,908				7,325
Available-for-sale investments							212,846				250,444
Money market funds			1				69,484				53,728
Certificate of deposit		N/A					2,930				2,930
Cash		N/A					3,065				1,842
Total cash and investments in marketable securities						$	288,325			$	308,944

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- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258

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X

- Definition

Tabular disclosure of the components of cash, cash equivalents, and investments.

+ References

No definition available.

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