AVAILABLE-FOR-SALE SECURITIES (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of amortized cost and estimated fair values for available-for-sale securities

	September 30, 2013
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government securities	$	42,169	$	60	$	—		$	42,229
U.S. government agencies	161,751		107		(1		)	161,857
U.S. corporate notes	103,773		43		(7		)	103,809
U.S. commercial paper	133,818		—		—			133,818
Money market funds	146,459		—		—			146,459
Total	$	587,970	$	210	$	(8	)	$	588,172

	December 31, 2012
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government securities	$	27,197	$	10	$	(2	)	$	27,205
U.S. government agencies	115,397		85		(16		)	115,466
U.S. corporate notes	91,544		32		(10		)	91,566
U.S. commercial paper	23,082		—		—			23,082
Money market funds	78,646		—		—			78,646
Total	$	335,866	$	127	$	(28	)	$	335,965

Summary of available-for-sale securities

(In thousands)	September 30, 2013		December 31, 2012
Cash and cash equivalents	$	164,745	$	86,298
Short-term investments	334,261		153,640
Marketable securities	88,333		95,194
Restricted cash	833		833
Total	$	588,172	$	335,965

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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