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Cash and Investments in Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Cash and Investments in Marketable Securities, Including Cash Equivalents and Restricted Cash

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

		Estimated Fair Value at
		June 30, 2014				December 31, 2013
Cash and cash equivalents		$	30,699			$	39,067
Short-term investments			245,737				197,959
Restricted cash			25,000				25,000
Total cash and investments in marketable securities		$	301,436			$	262,026

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		June 30, 2014				December 31, 2013
Corporate notes and bonds		2		$	171,793			$	138,515
Corporate commercial paper		2			75,643				59,444
Available-for-sale investments					247,436				197,959
Money market funds		1			23,733				26,453
Cash, including restricted cash		N/A			30,267				37,614
Total cash and investments in marketable securities				$	301,436			$	262,026

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+ References

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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 1

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258



Reference 2: 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

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